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Troubleshooting • Raspberry Pi 3, vc4-kms blackscreen only with 32bit

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Hey folks,

I'm using a Raspberry Pi 3, Model B, V1.2 here and am experiencing a weird effect over HDMI:

64bit Trixie, using vc4-kms-v3d works fine.
32bit Trixie, using vc4-kms-v3d causes a black screen.
32bit Trixie, using vc4-fkms-v3d works fine.

Virtual console/fb always works fine, black screen occurs as soon as lightdm/Xorg starts and tries to output anything (and that also breaks all the VTYs from that point onwards, Ctrl+Alt+F2, etc. doesn't work)

Here's the output of kmsprint and xrandr:
32bit/armhf, using fkms, working fine

Code:

root@kioskpi:~# uname -aLinux kioskpi 6.12.47+rpt-rpi-v7 #1 SMP Raspbian 1:6.12.47-1+rpt1 (2025-09-16) armv7l GNU/Linuxroot@kioskpi:~# kmsprintConnector 0 (90) HDMI-A-1 (connected)  Encoder 0 (89) TMDS    Crtc 0 (88) 1920x1080@60.00 148.500 1920/88/44/148/+ 1080/4/5/36/+ 60 (60.00)      Plane 0 (32) fb-id: 99 (crtcs: 0) 0,0 1920x1080 -> 0,0 1920x1080 (XR24 AR24 XB24 AB24 RX24 BX24 RG16 RG24 BG24 YU16 YU12 YV12 NV12 NV21 P030)        FB 99 1920x1080 XR24root@kioskpi:~# kmsprint -mConnector 0 (90) HDMI-A-1 (connected)   0 1920x1080@60.00  148.500 1920/88/44/148/+   1080/4/5/36/+      60 (60.00) P|D   1 1920x1080@60.00  148.500 1920/88/44/148/+   1080/4/5/36/+      60 (60.00) D     16:9   2 1920x1080@59.94  148.352 1920/88/44/148/+   1080/4/5/36/+      60 (59.94) D     16:9   3 1920x1080@50.00  148.500 1920/528/44/148/+  1080/4/5/36/+      50 (50.00) D     16:9   4 1920x1080@30.00   74.250 1920/88/44/148/+   1080/4/5/36/+      30 (30.00) D     16:9   5 1920x1080@29.97   74.176 1920/88/44/148/+   1080/4/5/36/+      30 (29.97) D     16:9   6 1920x1080@25.00   74.250 1920/528/44/148/+  1080/4/5/36/+      25 (25.00) D     16:9   7 1920x1080@24.00   74.250 1920/638/44/148/+  1080/4/5/36/+      24 (24.00) D     16:9   8 1920x1080@23.98   74.176 1920/638/44/148/+  1080/4/5/36/+      24 (23.98) D     16:9   9 1600x1200@60.00  162.000 1600/64/192/304/+  1200/1/3/46/+      60 (60.00) D  10 1680x1050@59.95  146.250 1680/104/176/280/- 1050/3/6/30/+      60 (59.95) D  11 1680x1050@59.88  119.000 1680/48/32/80/+    1050/3/6/21/-      60 (59.88) D  12 1400x1050@59.98  121.750 1400/88/144/232/-  1050/3/4/32/+      60 (59.98) D  13 1400x1050@59.95  101.000 1400/48/32/80/+    1050/3/4/23/-      60 (59.95) D  14 1600x900@60.00   108.000 1600/24/80/96/+    900/1/3/96/+       60 (60.00) D  15 1280x1024@60.02  108.000 1280/48/112/248/+  1024/1/3/38/+      60 (60.02) D  16 1440x900@59.89   106.500 1440/80/152/232/-  900/3/6/25/+       60 (59.89) D  17 1440x900@59.90    88.750 1440/48/32/80/+    900/3/6/17/-       60 (59.90) D  18 1280x960@60.00   108.000 1280/96/112/312/+  960/1/3/36/+       60 (60.00) D  19 1360x768@60.02    85.500 1360/64/112/256/+  768/3/6/18/+       60 (60.02) D  20 1280x800@59.81    83.500 1280/72/128/200/-  800/3/6/22/+       60 (59.81) D  21 1152x864@59.97    81.768 1152/64/120/184/-  864/3/4/26/+       60 (59.97)  22 1280x768@60.35    80.140 1280/64/128/192/-  768/3/7/20/-       60 (60.35) D  23 1280x768@59.87    79.500 1280/64/128/192/-  768/3/7/20/+       60 (59.87) D  24 1280x720@60.00    74.250 1280/110/40/220/+  720/5/5/20/+       60 (60.00) D  25 1280x720@60.00    74.250 1280/110/40/220/+  720/5/5/20/+       60 (60.00) D     16:9  26 1280x720@59.94    74.176 1280/110/40/220/+  720/5/5/20/+       60 (59.94) D     16:9  27 1280x720@50.00    74.250 1280/440/40/220/+  720/5/5/20/+       50 (50.00) D     16:9  28 1280x720@30.00    74.250 1280/1760/40/220/+ 720/5/5/20/+       30 (30.00) D     16:9  29 1280x720@29.97    74.176 1280/1760/40/220/+ 720/5/5/20/+       30 (29.97) D     16:9  30 1280x720@25.00    74.250 1280/2420/40/220/+ 720/5/5/20/+       25 (25.00) D     16:9  31 1280x720@24.00    59.400 1280/1760/40/220/+ 720/5/5/20/+       24 (24.00) D     16:9  32 1280x720@23.98    59.341 1280/1760/40/220/+ 720/5/5/20/+       24 (23.98) D     16:9  33 1024x768@60.00    65.000 1024/24/136/160/-  768/3/6/29/-       60 (60.00) D  34 800x600@60.32     40.000 800/40/128/88/+    600/1/4/23/+       60 (60.32) D  35 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D  36 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D     4:3  37 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D     16:9  38 720x480@60.00     27.027 720/16/62/60/-     480/9/6/30/-       60 (60.00) D     4:3  39 720x480@60.00     27.027 720/16/62/60/-     480/9/6/30/-       60 (60.00) D     16:9  40 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D  41 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D     4:3  42 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D     16:9  43 640x480@60.00     25.200 640/16/96/48/-     480/10/2/33/-      60 (60.00) D     4:3  44 640x480@59.94     25.175 640/16/96/48/-     480/10/2/33/-      60 (59.94) D  45 640x480@59.94     25.175 640/16/96/48/-     480/10/2/33/-      60 (59.94) D     4:3pi@kioskpi:~ $ xrandr --verboseScreen 0: minimum 320 x 200, current 1920 x 1080, maximum 2048 x 2048HDMI-1 connected primary 1920x1080+0+0 (0x41) normal (normal left inverted right x axis y axis) 708mm x 398mm  Identifier: 0x3f  Timestamp:  17970  Subpixel:   unknown  Gamma:      1.0:1.0:1.0  Brightness: 1.0  Clones:  CRTC:       0  CRTCs:      0  Transform:  1.000000 0.000000 0.000000              0.000000 1.000000 0.000000              0.000000 0.000000 1.000000             filter:  EDID:    00ffffffffffff002157010001000000    011d0104824627782ad9b0a357499c25    11494b210800714081c0810081408180    9500a9c0b300023a801871382d40582c    4500c48e2100001e000000fd0017551e    641e0410000000000001000000f7000a    0040c6440000000000000000000000fc    00484420544f205553420a202020012a    02032cf151010203041112131f202122    3c3d3e905f6423090707830100006703    0c001000b83ce50e61606665011d0072    51d01e206e285500c48e2100001e8c0a    d08a20e02d10103e9600c48e21000018    8c0ad090204031200c405500c48e2100    00184e1f008051001e3040803700c48e    21000018000000000000000000000022  Broadcast RGB: Automatic    supported: Automatic, Full, Limited 16:235  bottom margin: 0    range: (0, 100)  top margin: 0    range: (0, 100)  right margin: 0    range: (0, 100)  left margin: 0    range: (0, 100)  link-status: Good    supported: Good, Bad  CONNECTOR_ID: 90    supported: 90  non-desktop: 0    range: (0, 1)  1920x1080 (0x41) 148.500MHz +HSync +VSync *current +preferred        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz  1920x1080 (0x42) 148.500MHz +HSync +VSync        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock  56.25KHz        v: height 1080 start 1084 end 1089 total 1125           clock  50.00Hz  1920x1080 (0x43) 148.352MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.43KHz        v: height 1080 start 1084 end 1089 total 1125           clock  59.94Hz  1920x1080 (0x44) 74.250MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  33.75KHz        v: height 1080 start 1084 end 1089 total 1125           clock  30.00Hz  1920x1080 (0x45) 74.250MHz +HSync +VSync        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock  28.12KHz        v: height 1080 start 1084 end 1089 total 1125           clock  25.00Hz  1920x1080 (0x46) 74.250MHz +HSync +VSync        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock  27.00KHz        v: height 1080 start 1084 end 1089 total 1125           clock  24.00Hz  1920x1080 (0x47) 74.176MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  33.72KHz        v: height 1080 start 1084 end 1089 total 1125           clock  29.97Hz  1920x1080 (0x48) 74.176MHz +HSync +VSync        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock  26.97KHz        v: height 1080 start 1084 end 1089 total 1125           clock  23.98Hz  1600x1200 (0x49) 162.000MHz +HSync +VSync        h: width  1600 start 1664 end 1856 total 2160 skew    0 clock  75.00KHz        v: height 1200 start 1201 end 1204 total 1250           clock  60.00Hz  1680x1050 (0x4a) 146.250MHz -HSync +VSync        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock  65.29KHz        v: height 1050 start 1053 end 1059 total 1089           clock  59.95Hz  1680x1050 (0x4b) 119.000MHz +HSync -VSync        h: width  1680 start 1728 end 1760 total 1840 skew    0 clock  64.67KHz        v: height 1050 start 1053 end 1059 total 1080           clock  59.88Hz  1400x1050 (0x4c) 121.750MHz -HSync +VSync        h: width  1400 start 1488 end 1632 total 1864 skew    0 clock  65.32KHz        v: height 1050 start 1053 end 1057 total 1089           clock  59.98Hz  1400x1050 (0x4d) 101.000MHz +HSync -VSync        h: width  1400 start 1448 end 1480 total 1560 skew    0 clock  64.74KHz        v: height 1050 start 1053 end 1057 total 1080           clock  59.95Hz  1600x900 (0x4e) 108.000MHz +HSync +VSync        h: width  1600 start 1624 end 1704 total 1800 skew    0 clock  60.00KHz        v: height  900 start  901 end  904 total 1000           clock  60.00Hz  1280x1024 (0x4f) 108.000MHz +HSync +VSync        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz  1440x900 (0x50) 106.500MHz -HSync +VSync        h: width  1440 start 1520 end 1672 total 1904 skew    0 clock  55.93KHz        v: height  900 start  903 end  909 total  934           clock  59.89Hz  1440x900 (0x51) 88.750MHz +HSync -VSync        h: width  1440 start 1488 end 1520 total 1600 skew    0 clock  55.47KHz        v: height  900 start  903 end  909 total  926           clock  59.90Hz  1280x960 (0x52) 108.000MHz +HSync +VSync        h: width  1280 start 1376 end 1488 total 1800 skew    0 clock  60.00KHz        v: height  960 start  961 end  964 total 1000           clock  60.00Hz  1360x768 (0x53) 85.500MHz +HSync +VSync        h: width  1360 start 1424 end 1536 total 1792 skew    0 clock  47.71KHz        v: height  768 start  771 end  777 total  795           clock  60.02Hz  1280x800 (0x54) 83.500MHz -HSync +VSync        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  49.70KHz        v: height  800 start  803 end  809 total  831           clock  59.81Hz  1152x864 (0x55) 81.768MHz -HSync +VSync        h: width  1152 start 1216 end 1336 total 1520 skew    0 clock  53.79KHz        v: height  864 start  867 end  871 total  897           clock  59.97Hz  1280x768 (0x56) 80.140MHz -HSync -VSync        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  48.16KHz        v: height  768 start  771 end  778 total  798           clock  60.35Hz  1280x768 (0x57) 79.500MHz -HSync +VSync        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  47.78KHz        v: height  768 start  771 end  778 total  798           clock  59.87Hz  1280x720 (0x58) 74.250MHz +HSync +VSync        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  45.00KHz        v: height  720 start  725 end  730 total  750           clock  60.00Hz  1280x720 (0x59) 74.250MHz +HSync +VSync        h: width  1280 start 1720 end 1760 total 1980 skew    0 clock  37.50KHz        v: height  720 start  725 end  730 total  750           clock  50.00Hz  1280x720 (0x5a) 74.250MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  22.50KHz        v: height  720 start  725 end  730 total  750           clock  30.00Hz  1280x720 (0x5b) 74.250MHz +HSync +VSync        h: width  1280 start 3700 end 3740 total 3960 skew    0 clock  18.75KHz        v: height  720 start  725 end  730 total  750           clock  25.00Hz  1280x720 (0x5c) 74.176MHz +HSync +VSync        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  44.96KHz        v: height  720 start  725 end  730 total  750           clock  59.94Hz  1280x720 (0x5d) 74.176MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  22.48KHz        v: height  720 start  725 end  730 total  750           clock  29.97Hz  1280x720 (0x5e) 59.400MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  18.00KHz        v: height  720 start  725 end  730 total  750           clock  24.00Hz  1280x720 (0x5f) 59.341MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  17.98KHz        v: height  720 start  725 end  730 total  750           clock  23.98Hz  1024x768 (0x60) 65.000MHz -HSync -VSync        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz        v: height  768 start  771 end  777 total  806           clock  60.00Hz  800x600 (0x61) 40.000MHz +HSync +VSync        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz        v: height  600 start  601 end  605 total  628           clock  60.32Hz  720x576 (0x62) 27.000MHz -HSync -VSync        h: width   720 start  732 end  796 total  864 skew    0 clock  31.25KHz        v: height  576 start  581 end  586 total  625           clock  50.00Hz  720x480 (0x63) 27.027MHz -HSync -VSync        h: width   720 start  736 end  798 total  858 skew    0 clock  31.50KHz        v: height  480 start  489 end  495 total  525           clock  60.00Hz  720x480 (0x64) 27.000MHz -HSync -VSync        h: width   720 start  736 end  798 total  858 skew    0 clock  31.47KHz        v: height  480 start  489 end  495 total  525           clock  59.94Hz  640x480 (0x65) 25.200MHz -HSync -VSync        h: width   640 start  656 end  752 total  800 skew    0 clock  31.50KHz        v: height  480 start  490 end  492 total  525           clock  60.00Hz  640x480 (0x66) 25.175MHz -HSync -VSync        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz        v: height  480 start  490 end  492 total  525           clock  59.94Hz
32bit/armhf, using kms, black screen

Code:

root@kioskpi:~# uname -aLinux kioskpi 6.12.47+rpt-rpi-v7 #1 SMP Raspbian 1:6.12.47-1+rpt1 (2025-09-16) armv7l GNU/Linuxroot@kioskpi:~# kmsprintConnector 0 (33) HDMI-A-1 (connected)  Encoder 0 (32) TMDS    Crtc 3 (95) 1920x1080@60.00 148.500 1920/88/44/148/+ 1080/4/5/36/+ 60 (60.00)      Plane 3 (84) fb-id: 674 (crtcs: 3) 0,0 1920x1080 -> 0,0 1920x1080 (XR24 AR24 AB24 XB24 RG16 BG16 AR15 XR15 RG24 BG24 YU16 YV16 YU24 YV24 YU12 YV12 NV12 NV21 NV16 NV61 RGB8 BGR8 XR12 AR12 XB12 AB12 BX12 BA12 RX12 RA12)        FB 674 1920x1080 XR24      Plane 55 (657) fb-id: 671 (crtcs: 3) 0,0 64x64 -> 61,261 64x64 (XR24 AR24 AB24 XB24 RG16 BG16 AR15 XR15 RG24 BG24 YU16 YV16 YU24 YV24 YU12 YV12 NV12 NV21 NV16 NV61 RGB8 BGR8 XR12 AR12 XB12 AB12 BX12 BA12 RX12 RA12)        FB 671 64x64 AR24root@kioskpi:~# kmsprint -mConnector 0 (33) HDMI-A-1 (connected)   0 1920x1080@60.00  148.500 1920/88/44/148/+   1080/4/5/36/+      60 (60.00) P|D   1 1920x1080@60.00  148.500 1920/88/44/148/+   1080/4/5/36/+      60 (60.00) D     16:9   2 1920x1080@59.94  148.352 1920/88/44/148/+   1080/4/5/36/+      60 (59.94) D     16:9   3 1920x1080@50.00  148.500 1920/528/44/148/+  1080/4/5/36/+      50 (50.00) D     16:9   4 1920x1080@30.00   74.250 1920/88/44/148/+   1080/4/5/36/+      30 (30.00) D     16:9   5 1920x1080@29.97   74.176 1920/88/44/148/+   1080/4/5/36/+      30 (29.97) D     16:9   6 1920x1080@25.00   74.250 1920/528/44/148/+  1080/4/5/36/+      25 (25.00) D     16:9   7 1920x1080@24.00   74.250 1920/638/44/148/+  1080/4/5/36/+      24 (24.00) D     16:9   8 1920x1080@23.98   74.176 1920/638/44/148/+  1080/4/5/36/+      24 (23.98) D     16:9   9 1600x1200@60.00  162.000 1600/64/192/304/+  1200/1/3/46/+      60 (60.00) D  10 1680x1050@59.95  146.250 1680/104/176/280/- 1050/3/6/30/+      60 (59.95) D  11 1680x1050@59.88  119.000 1680/48/32/80/+    1050/3/6/21/-      60 (59.88) D  12 1400x1050@59.98  121.750 1400/88/144/232/-  1050/3/4/32/+      60 (59.98) D  13 1400x1050@59.95  101.000 1400/48/32/80/+    1050/3/4/23/-      60 (59.95) D  14 1600x900@60.00   108.000 1600/24/80/96/+    900/1/3/96/+       60 (60.00) D  15 1280x1024@60.02  108.000 1280/48/112/248/+  1024/1/3/38/+      60 (60.02) D  16 1440x900@59.89   106.500 1440/80/152/232/-  900/3/6/25/+       60 (59.89) D  17 1440x900@59.90    88.750 1440/48/32/80/+    900/3/6/17/-       60 (59.90) D  18 1280x960@60.00   108.000 1280/96/112/312/+  960/1/3/36/+       60 (60.00) D  19 1360x768@60.02    85.500 1360/64/112/256/+  768/3/6/18/+       60 (60.02) D  20 1280x800@59.81    83.500 1280/72/128/200/-  800/3/6/22/+       60 (59.81) D  21 1152x864@59.97    81.768 1152/64/120/184/-  864/3/4/26/+       60 (59.97)  22 1280x768@60.35    80.140 1280/64/128/192/-  768/3/7/20/-       60 (60.35) D  23 1280x768@59.87    79.500 1280/64/128/192/-  768/3/7/20/+       60 (59.87) D  24 1280x720@60.00    74.250 1280/110/40/220/+  720/5/5/20/+       60 (60.00) D  25 1280x720@60.00    74.250 1280/110/40/220/+  720/5/5/20/+       60 (60.00) D     16:9  26 1280x720@59.94    74.176 1280/110/40/220/+  720/5/5/20/+       60 (59.94) D     16:9  27 1280x720@50.00    74.250 1280/440/40/220/+  720/5/5/20/+       50 (50.00) D     16:9  28 1280x720@30.00    74.250 1280/1760/40/220/+ 720/5/5/20/+       30 (30.00) D     16:9  29 1280x720@29.97    74.176 1280/1760/40/220/+ 720/5/5/20/+       30 (29.97) D     16:9  30 1280x720@25.00    74.250 1280/2420/40/220/+ 720/5/5/20/+       25 (25.00) D     16:9  31 1280x720@24.00    59.400 1280/1760/40/220/+ 720/5/5/20/+       24 (24.00) D     16:9  32 1280x720@23.98    59.341 1280/1760/40/220/+ 720/5/5/20/+       24 (23.98) D     16:9  33 1024x768@60.00    65.000 1024/24/136/160/-  768/3/6/29/-       60 (60.00) D  34 800x600@60.32     40.000 800/40/128/88/+    600/1/4/23/+       60 (60.32) D  35 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D  36 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D     4:3  37 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D     16:9  38 720x480@60.00     27.027 720/16/62/60/-     480/9/6/30/-       60 (60.00) D     4:3  39 720x480@60.00     27.027 720/16/62/60/-     480/9/6/30/-       60 (60.00) D     16:9  40 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D  41 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D     4:3  42 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D     16:9  43 640x480@60.00     25.200 640/16/96/48/-     480/10/2/33/-      60 (60.00) D     4:3  44 640x480@59.94     25.175 640/16/96/48/-     480/10/2/33/-      60 (59.94) D  45 640x480@59.94     25.175 640/16/96/48/-     480/10/2/33/-      60 (59.94) D     4:3root@kioskpi:~#Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 2048 x 2048HDMI-1 connected primary 1920x1080+0+0 (0x44) normal (normal left inverted right x axis y axis) 708mm x 398mm  Identifier: 0x42  Timestamp:  20980  Subpixel:   unknown  Gamma:      1.0:1.0:1.0  Brightness: 1.0  Clones:  CRTC:       0  CRTCs:      0  Transform:  1.000000 0.000000 0.000000              0.000000 1.000000 0.000000              0.000000 0.000000 1.000000             filter:  EDID:    00ffffffffffff002157010001000000    011d0104824627782ad9b0a357499c25    11494b210800714081c0810081408180    9500a9c0b300023a801871382d40582c    4500c48e2100001e000000fd0017551e    641e0410000000000001000000f7000a    0040c6440000000000000000000000fc    00484420544f205553420a202020012a    02032cf151010203041112131f202122    3c3d3e905f6423090707830100006703    0c001000b83ce50e61606665011d0072    51d01e206e285500c48e2100001e8c0a    d08a20e02d10103e9600c48e21000018    8c0ad090204031200c405500c48e2100    00184e1f008051001e3040803700c48e    21000018000000000000000000000022  Broadcast RGB: Automatic    supported: Automatic, Full, Limited 16:235  bottom margin: 0    range: (0, 100)  top margin: 0    range: (0, 100)  right margin: 0    range: (0, 100)  left margin: 0    range: (0, 100)  Colorspace: Default    supported: Default, SMPTE_170M_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, opRGB, BT2020_CYCC, BT2020_RGB, BT2020_YCC, DCI-P3_RGB_D65, DCI-P3_RGB_Theater  max bpc: 8    range: (8, 8)  link-status: Good    supported: Good, Bad  CTM:  0.000000 0.000000 0.000000    0.000000 0.000000 0.000000    0.000000 0.000000 0.000000  CONNECTOR_ID: 33    supported: 33  non-desktop: 0    range: (0, 1)  1920x1080 (0x44) 148.500MHz +HSync +VSync *current +preferred        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz  1920x1080 (0x45) 148.500MHz +HSync +VSync        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock  56.25KHz        v: height 1080 start 1084 end 1089 total 1125           clock  50.00Hz  1920x1080 (0x46) 148.352MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.43KHz        v: height 1080 start 1084 end 1089 total 1125           clock  59.94Hz  1920x1080 (0x47) 74.250MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  33.75KHz        v: height 1080 start 1084 end 1089 total 1125           clock  30.00Hz  1920x1080 (0x48) 74.250MHz +HSync +VSync        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock  28.12KHz        v: height 1080 start 1084 end 1089 total 1125           clock  25.00Hz  1920x1080 (0x49) 74.250MHz +HSync +VSync        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock  27.00KHz        v: height 1080 start 1084 end 1089 total 1125           clock  24.00Hz  1920x1080 (0x4a) 74.176MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  33.72KHz        v: height 1080 start 1084 end 1089 total 1125           clock  29.97Hz  1920x1080 (0x4b) 74.176MHz +HSync +VSync        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock  26.97KHz        v: height 1080 start 1084 end 1089 total 1125           clock  23.98Hz  1600x1200 (0x4c) 162.000MHz +HSync +VSync        h: width  1600 start 1664 end 1856 total 2160 skew    0 clock  75.00KHz        v: height 1200 start 1201 end 1204 total 1250           clock  60.00Hz  1680x1050 (0x4d) 146.250MHz -HSync +VSync        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock  65.29KHz        v: height 1050 start 1053 end 1059 total 1089           clock  59.95Hz  1680x1050 (0x4e) 119.000MHz +HSync -VSync        h: width  1680 start 1728 end 1760 total 1840 skew    0 clock  64.67KHz        v: height 1050 start 1053 end 1059 total 1080           clock  59.88Hz  1400x1050 (0x4f) 121.750MHz -HSync +VSync        h: width  1400 start 1488 end 1632 total 1864 skew    0 clock  65.32KHz        v: height 1050 start 1053 end 1057 total 1089           clock  59.98Hz  1400x1050 (0x50) 101.000MHz +HSync -VSync        h: width  1400 start 1448 end 1480 total 1560 skew    0 clock  64.74KHz        v: height 1050 start 1053 end 1057 total 1080           clock  59.95Hz  1600x900 (0x51) 108.000MHz +HSync +VSync        h: width  1600 start 1624 end 1704 total 1800 skew    0 clock  60.00KHz        v: height  900 start  901 end  904 total 1000           clock  60.00Hz  1280x1024 (0x52) 108.000MHz +HSync +VSync        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz  1440x900 (0x53) 106.500MHz -HSync +VSync        h: width  1440 start 1520 end 1672 total 1904 skew    0 clock  55.93KHz        v: height  900 start  903 end  909 total  934           clock  59.89Hz  1440x900 (0x54) 88.750MHz +HSync -VSync        h: width  1440 start 1488 end 1520 total 1600 skew    0 clock  55.47KHz        v: height  900 start  903 end  909 total  926           clock  59.90Hz  1280x960 (0x55) 108.000MHz +HSync +VSync        h: width  1280 start 1376 end 1488 total 1800 skew    0 clock  60.00KHz        v: height  960 start  961 end  964 total 1000           clock  60.00Hz  1360x768 (0x56) 85.500MHz +HSync +VSync        h: width  1360 start 1424 end 1536 total 1792 skew    0 clock  47.71KHz        v: height  768 start  771 end  777 total  795           clock  60.02Hz  1280x800 (0x57) 83.500MHz -HSync +VSync        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  49.70KHz        v: height  800 start  803 end  809 total  831           clock  59.81Hz  1152x864 (0x58) 81.768MHz -HSync +VSync        h: width  1152 start 1216 end 1336 total 1520 skew    0 clock  53.79KHz        v: height  864 start  867 end  871 total  897           clock  59.97Hz  1280x768 (0x59) 80.140MHz -HSync -VSync        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  48.16KHz        v: height  768 start  771 end  778 total  798           clock  60.35Hz  1280x768 (0x5a) 79.500MHz -HSync +VSync        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  47.78KHz        v: height  768 start  771 end  778 total  798           clock  59.87Hz  1280x720 (0x5b) 74.250MHz +HSync +VSync        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  45.00KHz        v: height  720 start  725 end  730 total  750           clock  60.00Hz  1280x720 (0x5c) 74.250MHz +HSync +VSync        h: width  1280 start 1720 end 1760 total 1980 skew    0 clock  37.50KHz        v: height  720 start  725 end  730 total  750           clock  50.00Hz  1280x720 (0x5d) 74.250MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  22.50KHz        v: height  720 start  725 end  730 total  750           clock  30.00Hz  1280x720 (0x5e) 74.250MHz +HSync +VSync        h: width  1280 start 3700 end 3740 total 3960 skew    0 clock  18.75KHz        v: height  720 start  725 end  730 total  750           clock  25.00Hz  1280x720 (0x5f) 74.176MHz +HSync +VSync        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  44.96KHz        v: height  720 start  725 end  730 total  750           clock  59.94Hz  1280x720 (0x60) 74.176MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  22.48KHz        v: height  720 start  725 end  730 total  750           clock  29.97Hz  1280x720 (0x61) 59.400MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  18.00KHz        v: height  720 start  725 end  730 total  750           clock  24.00Hz  1280x720 (0x62) 59.341MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  17.98KHz        v: height  720 start  725 end  730 total  750           clock  23.98Hz  1024x768 (0x63) 65.000MHz -HSync -VSync        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz        v: height  768 start  771 end  777 total  806           clock  60.00Hz  800x600 (0x64) 40.000MHz +HSync +VSync        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz        v: height  600 start  601 end  605 total  628           clock  60.32Hz  720x576 (0x65) 27.000MHz -HSync -VSync        h: width   720 start  732 end  796 total  864 skew    0 clock  31.25KHz        v: height  576 start  581 end  586 total  625           clock  50.00Hz  720x480 (0x66) 27.027MHz -HSync -VSync        h: width   720 start  736 end  798 total  858 skew    0 clock  31.50KHz        v: height  480 start  489 end  495 total  525           clock  60.00Hz  720x480 (0x67) 27.000MHz -HSync -VSync        h: width   720 start  736 end  798 total  858 skew    0 clock  31.47KHz        v: height  480 start  489 end  495 total  525           clock  59.94Hz  640x480 (0x68) 25.200MHz -HSync -VSync        h: width   640 start  656 end  752 total  800 skew    0 clock  31.50KHz        v: height  480 start  490 end  492 total  525           clock  60.00Hz  640x480 (0x69) 25.175MHz -HSync -VSync        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz        v: height  480 start  490 end  492 total  525           clock  59.94Hz
64bit/arm64, using kms, working fine

Code:

root@kioskpi:~# uname -aLinux kioskpi 6.12.47+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.12.47-1+rpt1 (2025-09-16) aarch64 GNU/Linuxroot@kioskpi:~# kmsprintConnector 0 (90) HDMI-A-1 (connected)  Encoder 0 (89) TMDS    Crtc 0 (88) 1920x1080@60.00 148.500 1920/88/44/148/+ 1080/4/5/36/+ 60 (60.00)      Plane 0 (32) fb-id: 99 (crtcs: 0) 0,0 1920x1080 -> 0,0 1920x1080 (XR24 AR24 XB24 AB24 RX24 BX24 RG16 RG24 BG24 YU16 YU12 YV12 NV12 NV21 P030)        FB 99 1920x1080 XR24root@kioskpi:~# kmsprint -mConnector 0 (90) HDMI-A-1 (connected)   0 1920x1080@60.00  148.500 1920/88/44/148/+   1080/4/5/36/+      60 (60.00) P|D   1 1920x1080@60.00  148.500 1920/88/44/148/+   1080/4/5/36/+      60 (60.00) D     16:9   2 1920x1080@59.94  148.352 1920/88/44/148/+   1080/4/5/36/+      60 (59.94) D     16:9   3 1920x1080@50.00  148.500 1920/528/44/148/+  1080/4/5/36/+      50 (50.00) D     16:9   4 1920x1080@30.00   74.250 1920/88/44/148/+   1080/4/5/36/+      30 (30.00) D     16:9   5 1920x1080@29.97   74.176 1920/88/44/148/+   1080/4/5/36/+      30 (29.97) D     16:9   6 1920x1080@25.00   74.250 1920/528/44/148/+  1080/4/5/36/+      25 (25.00) D     16:9   7 1920x1080@24.00   74.250 1920/638/44/148/+  1080/4/5/36/+      24 (24.00) D     16:9   8 1920x1080@23.98   74.176 1920/638/44/148/+  1080/4/5/36/+      24 (23.98) D     16:9   9 1600x1200@60.00  162.000 1600/64/192/304/+  1200/1/3/46/+      60 (60.00) D  10 1680x1050@59.95  146.250 1680/104/176/280/- 1050/3/6/30/+      60 (59.95) D  11 1680x1050@59.88  119.000 1680/48/32/80/+    1050/3/6/21/-      60 (59.88) D  12 1400x1050@59.98  121.750 1400/88/144/232/-  1050/3/4/32/+      60 (59.98) D  13 1400x1050@59.95  101.000 1400/48/32/80/+    1050/3/4/23/-      60 (59.95) D  14 1600x900@60.00   108.000 1600/24/80/96/+    900/1/3/96/+       60 (60.00) D  15 1280x1024@60.02  108.000 1280/48/112/248/+  1024/1/3/38/+      60 (60.02) D  16 1440x900@59.89   106.500 1440/80/152/232/-  900/3/6/25/+       60 (59.89) D  17 1440x900@59.90    88.750 1440/48/32/80/+    900/3/6/17/-       60 (59.90) D  18 1280x960@60.00   108.000 1280/96/112/312/+  960/1/3/36/+       60 (60.00) D  19 1360x768@60.02    85.500 1360/64/112/256/+  768/3/6/18/+       60 (60.02) D  20 1280x800@59.81    83.500 1280/72/128/200/-  800/3/6/22/+       60 (59.81) D  21 1152x864@59.97    81.768 1152/64/120/184/-  864/3/4/26/+       60 (59.97)  22 1280x768@60.35    80.140 1280/64/128/192/-  768/3/7/20/-       60 (60.35) D  23 1280x768@59.87    79.500 1280/64/128/192/-  768/3/7/20/+       60 (59.87) D  24 1280x720@60.00    74.250 1280/110/40/220/+  720/5/5/20/+       60 (60.00) D  25 1280x720@60.00    74.250 1280/110/40/220/+  720/5/5/20/+       60 (60.00) D     16:9  26 1280x720@59.94    74.176 1280/110/40/220/+  720/5/5/20/+       60 (59.94) D     16:9  27 1280x720@50.00    74.250 1280/440/40/220/+  720/5/5/20/+       50 (50.00) D     16:9  28 1280x720@30.00    74.250 1280/1760/40/220/+ 720/5/5/20/+       30 (30.00) D     16:9  29 1280x720@29.97    74.176 1280/1760/40/220/+ 720/5/5/20/+       30 (29.97) D     16:9  30 1280x720@25.00    74.250 1280/2420/40/220/+ 720/5/5/20/+       25 (25.00) D     16:9  31 1280x720@24.00    59.400 1280/1760/40/220/+ 720/5/5/20/+       24 (24.00) D     16:9  32 1280x720@23.98    59.341 1280/1760/40/220/+ 720/5/5/20/+       24 (23.98) D     16:9  33 1024x768@60.00    65.000 1024/24/136/160/-  768/3/6/29/-       60 (60.00) D  34 800x600@60.32     40.000 800/40/128/88/+    600/1/4/23/+       60 (60.32) D  35 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D  36 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D     4:3  37 720x576@50.00     27.000 720/12/64/68/-     576/5/5/39/-       50 (50.00) D     16:9  38 720x480@60.00     27.027 720/16/62/60/-     480/9/6/30/-       60 (60.00) D     4:3  39 720x480@60.00     27.027 720/16/62/60/-     480/9/6/30/-       60 (60.00) D     16:9  40 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D  41 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D     4:3  42 720x480@59.94     27.000 720/16/62/60/-     480/9/6/30/-       60 (59.94) D     16:9  43 640x480@60.00     25.200 640/16/96/48/-     480/10/2/33/-      60 (60.00) D     4:3  44 640x480@59.94     25.175 640/16/96/48/-     480/10/2/33/-      60 (59.94) D  45 640x480@59.94     25.175 640/16/96/48/-     480/10/2/33/-      60 (59.94) D     4:3pi@kioskpi:~ $ xrandr --verboseScreen 0: minimum 320 x 200, current 1920 x 1080, maximum 2048 x 2048HDMI-1 connected primary 1920x1080+0+0 (0x41) normal (normal left inverted right x axis y axis) 708mm x 398mm  Identifier: 0x3f  Timestamp:  19288  Subpixel:   unknown  Gamma:      1.0:1.0:1.0  Brightness: 1.0  Clones:  CRTC:       0  CRTCs:      0  Transform:  1.000000 0.000000 0.000000              0.000000 1.000000 0.000000              0.000000 0.000000 1.000000             filter:  EDID:    00ffffffffffff002157010001000000    011d0104824627782ad9b0a357499c25    11494b210800714081c0810081408180    9500a9c0b300023a801871382d40582c    4500c48e2100001e000000fd0017551e    641e0410000000000001000000f7000a    0040c6440000000000000000000000fc    00484420544f205553420a202020012a    02032cf151010203041112131f202122    3c3d3e905f6423090707830100006703    0c001000b83ce50e61606665011d0072    51d01e206e285500c48e2100001e8c0a    d08a20e02d10103e9600c48e21000018    8c0ad090204031200c405500c48e2100    00184e1f008051001e3040803700c48e    21000018000000000000000000000022  Broadcast RGB: Automatic    supported: Automatic, Full, Limited 16:235  bottom margin: 0    range: (0, 100)  top margin: 0    range: (0, 100)  right margin: 0    range: (0, 100)  left margin: 0    range: (0, 100)  link-status: Good    supported: Good, Bad  CONNECTOR_ID: 90    supported: 90  non-desktop: 0    range: (0, 1)  1920x1080 (0x41) 148.500MHz +HSync +VSync *current +preferred        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz  1920x1080 (0x42) 148.500MHz +HSync +VSync        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock  56.25KHz        v: height 1080 start 1084 end 1089 total 1125           clock  50.00Hz  1920x1080 (0x43) 148.352MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.43KHz        v: height 1080 start 1084 end 1089 total 1125           clock  59.94Hz  1920x1080 (0x44) 74.250MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  33.75KHz        v: height 1080 start 1084 end 1089 total 1125           clock  30.00Hz  1920x1080 (0x45) 74.250MHz +HSync +VSync        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock  28.12KHz        v: height 1080 start 1084 end 1089 total 1125           clock  25.00Hz  1920x1080 (0x46) 74.250MHz +HSync +VSync        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock  27.00KHz        v: height 1080 start 1084 end 1089 total 1125           clock  24.00Hz  1920x1080 (0x47) 74.176MHz +HSync +VSync        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  33.72KHz        v: height 1080 start 1084 end 1089 total 1125           clock  29.97Hz  1920x1080 (0x48) 74.176MHz +HSync +VSync        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock  26.97KHz        v: height 1080 start 1084 end 1089 total 1125           clock  23.98Hz  1600x1200 (0x49) 162.000MHz +HSync +VSync        h: width  1600 start 1664 end 1856 total 2160 skew    0 clock  75.00KHz        v: height 1200 start 1201 end 1204 total 1250           clock  60.00Hz  1680x1050 (0x4a) 146.250MHz -HSync +VSync        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock  65.29KHz        v: height 1050 start 1053 end 1059 total 1089           clock  59.95Hz  1680x1050 (0x4b) 119.000MHz +HSync -VSync        h: width  1680 start 1728 end 1760 total 1840 skew    0 clock  64.67KHz        v: height 1050 start 1053 end 1059 total 1080           clock  59.88Hz  1400x1050 (0x4c) 121.750MHz -HSync +VSync        h: width  1400 start 1488 end 1632 total 1864 skew    0 clock  65.32KHz        v: height 1050 start 1053 end 1057 total 1089           clock  59.98Hz  1400x1050 (0x4d) 101.000MHz +HSync -VSync        h: width  1400 start 1448 end 1480 total 1560 skew    0 clock  64.74KHz        v: height 1050 start 1053 end 1057 total 1080           clock  59.95Hz  1600x900 (0x4e) 108.000MHz +HSync +VSync        h: width  1600 start 1624 end 1704 total 1800 skew    0 clock  60.00KHz        v: height  900 start  901 end  904 total 1000           clock  60.00Hz  1280x1024 (0x4f) 108.000MHz +HSync +VSync        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz  1440x900 (0x50) 106.500MHz -HSync +VSync        h: width  1440 start 1520 end 1672 total 1904 skew    0 clock  55.93KHz        v: height  900 start  903 end  909 total  934           clock  59.89Hz  1440x900 (0x51) 88.750MHz +HSync -VSync        h: width  1440 start 1488 end 1520 total 1600 skew    0 clock  55.47KHz        v: height  900 start  903 end  909 total  926           clock  59.90Hz  1280x960 (0x52) 108.000MHz +HSync +VSync        h: width  1280 start 1376 end 1488 total 1800 skew    0 clock  60.00KHz        v: height  960 start  961 end  964 total 1000           clock  60.00Hz  1360x768 (0x53) 85.500MHz +HSync +VSync        h: width  1360 start 1424 end 1536 total 1792 skew    0 clock  47.71KHz        v: height  768 start  771 end  777 total  795           clock  60.02Hz  1280x800 (0x54) 83.500MHz -HSync +VSync        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  49.70KHz        v: height  800 start  803 end  809 total  831           clock  59.81Hz  1152x864 (0x55) 81.768MHz -HSync +VSync        h: width  1152 start 1216 end 1336 total 1520 skew    0 clock  53.79KHz        v: height  864 start  867 end  871 total  897           clock  59.97Hz  1280x768 (0x56) 80.140MHz -HSync -VSync        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  48.16KHz        v: height  768 start  771 end  778 total  798           clock  60.35Hz  1280x768 (0x57) 79.500MHz -HSync +VSync        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  47.78KHz        v: height  768 start  771 end  778 total  798           clock  59.87Hz  1280x720 (0x58) 74.250MHz +HSync +VSync        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  45.00KHz        v: height  720 start  725 end  730 total  750           clock  60.00Hz  1280x720 (0x59) 74.250MHz +HSync +VSync        h: width  1280 start 1720 end 1760 total 1980 skew    0 clock  37.50KHz        v: height  720 start  725 end  730 total  750           clock  50.00Hz  1280x720 (0x5a) 74.250MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  22.50KHz        v: height  720 start  725 end  730 total  750           clock  30.00Hz  1280x720 (0x5b) 74.250MHz +HSync +VSync        h: width  1280 start 3700 end 3740 total 3960 skew    0 clock  18.75KHz        v: height  720 start  725 end  730 total  750           clock  25.00Hz  1280x720 (0x5c) 74.176MHz +HSync +VSync        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  44.96KHz        v: height  720 start  725 end  730 total  750           clock  59.94Hz  1280x720 (0x5d) 74.176MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  22.48KHz        v: height  720 start  725 end  730 total  750           clock  29.97Hz  1280x720 (0x5e) 59.400MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  18.00KHz        v: height  720 start  725 end  730 total  750           clock  24.00Hz  1280x720 (0x5f) 59.341MHz +HSync +VSync        h: width  1280 start 3040 end 3080 total 3300 skew    0 clock  17.98KHz        v: height  720 start  725 end  730 total  750           clock  23.98Hz  1024x768 (0x60) 65.000MHz -HSync -VSync        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz        v: height  768 start  771 end  777 total  806           clock  60.00Hz  800x600 (0x61) 40.000MHz +HSync +VSync        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz        v: height  600 start  601 end  605 total  628           clock  60.32Hz  720x576 (0x62) 27.000MHz -HSync -VSync        h: width   720 start  732 end  796 total  864 skew    0 clock  31.25KHz        v: height  576 start  581 end  586 total  625           clock  50.00Hz  720x480 (0x63) 27.027MHz -HSync -VSync        h: width   720 start  736 end  798 total  858 skew    0 clock  31.50KHz        v: height  480 start  489 end  495 total  525           clock  60.00Hz  720x480 (0x64) 27.000MHz -HSync -VSync        h: width   720 start  736 end  798 total  858 skew    0 clock  31.47KHz        v: height  480 start  489 end  495 total  525           clock  59.94Hz  640x480 (0x65) 25.200MHz -HSync -VSync        h: width   640 start  656 end  752 total  800 skew    0 clock  31.50KHz        v: height  480 start  490 end  492 total  525           clock  60.00Hz  640x480 (0x66) 25.175MHz -HSync -VSync        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz        v: height  480 start  490 end  492 total  525           clock  59.94Hz
Both working configurations (32bit FKMS and 64bit KMS) have

Code:

Connector 0 (90) HDMI-A-1 (connected)  Encoder 0 (89) TMDS    Crtc 0 (88) 1920x1080@60.00 148.500 1920/88/44/148/+ 1080/4/5/36/+ 60 (60.00)
whereas the broken 32bit KMS tries to use:

Code:

Connector 0 (33) HDMI-A-1 (connected)  Encoder 0 (32) TMDS    Crtc 3 (95) 1920x1080@60.00 148.500 1920/88/44/148/+ 1080/4/5/36/+ 60 (60.00)      Plane 3 (84) fb-id: 674 (crtcs: 3) 0,0 1920x1080 -> 0,0 1920x1080 (XR24 AR24 AB24 XB24 RG16 BG16 AR15 XR15 RG24 BG24 YU16 YV16 YU24 YV24 YU12 YV12 NV12 NV21 NV16 NV61 RGB8 BGR8 XR12 AR12 XB12 AB12 BX12 BA12 RX12 RA12)
I'm guessing that this might be a software bug?
I've played around with the vc4.force_hotplug=1 parameter already, but it didn't change anything.
My "monitor" is a MacroSilicon MS2109 HDMI->USB dongle right now, but I can reproduce this with one of my HDMI monitors from Samsung as well.

Thanks
Manawyrm

Statistics: Posted by manawyrm — Sun Oct 19, 2025 4:29 am



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