Troubleshooting • HDMI output resolution changes

Code:

karthik@raspberrypi:~ $ xrandrScreen 0: minimum 320 x 200, current 1920 x 1080, maximum 7680 x 7680HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 160mm x 90mm   1920x1080     60.00*+  50.00    59.94    30.00    25.00    24.00    29.97    23.98   1920x1080i    60.00    50.00    59.94   1600x1200     60.00   1680x1050     59.88   1280x1024     75.02    60.02   1440x900      74.98    59.90   1280x960      60.00   1280x800      59.91   1152x864      75.00   1280x720      60.00    50.00    59.94   1024x768      75.03    70.07    60.00   832x624       74.55   800x600       72.19    75.00    60.32    56.25   720x576       50.00   720x480       60.00    59.94   640x480       75.00    72.81    66.67    60.00    59.94   720x400       70.08

Code:

karthik@raspberrypi:~ $ cat /etc/os-releasePRETTY_NAME="Debian GNU/Linux 11 (bullseye)"NAME="Debian GNU/Linux"VERSION_ID="11"VERSION="11 (bullseye)"VERSION_CODENAME=bullseyeID=debianHOME_URL="https://www.debian.org/"SUPPORT_URL="https://www.debian.org/support"BUG_REPORT_URL="https://bugs.debian.org/"karthik@raspberrypi:~ $ uname -arLinux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST 2023 aarch64 GNU/Linux

Code:

karthik@raspberrypi:~ $ cat /boot/config.txt# For more options and information see# http://rpf.io/configtxt# Some settings may impact device functionality. See link above for details# uncomment if you get no picture on HDMI for a default "safe" mode#hdmi_safe=1# uncomment the following to adjust overscan. Use positive numbers if console# goes off screen, and negative if there is too much border#overscan_left=16#overscan_right=16#overscan_top=16#overscan_bottom=16# uncomment to force a console size. By default it will be display's size minus# overscan.#framebuffer_width=1280#framebuffer_height=720# uncomment if hdmi display is not detected and composite is being output#hdmi_force_hotplug=1# uncomment to force a specific HDMI mode (this will force VGA)#hdmi_group=1#hdmi_mode=66hdmi_force_hotplug=1hdmi_ignore_edid=0xa5000080config_hdmi_boost=4hdmi_group=1hdmi_mode=66disable_overscan=0overscan_left=24overscan_right=24overscan_top=24overscan_bottom=24# uncomment to force a HDMI mode rather than DVI. This can make audio work in# DMT (computer monitor) modes#hdmi_drive=2# uncomment to increase signal to HDMI, if you have interference, blanking, or# no display#config_hdmi_boost=4# uncomment for composite PAL#sdtv_mode=2#uncomment to overclock the arm. 700 MHz is the default.#arm_freq=800# Uncomment some or all of these to enable the optional hardware interfaces#dtparam=i2c_arm=on#dtparam=i2s=on#dtparam=spi=on# Uncomment this to enable infrared communication.#dtoverlay=gpio-ir,gpio_pin=17#dtoverlay=gpio-ir-tx,gpio_pin=18# Additional overlays and parameters are documented /boot/overlays/README# Enable audio (loads snd_bcm2835)dtparam=audio=on# Automatically load overlays for detected camerascamera_auto_detect=1# Automatically load overlays for detected DSI displaysdisplay_auto_detect=1# Enable DRM VC4 V3D driverdtoverlay=vc4-fkms-v3dmax_framebuffers=2# Run in 64-bit modearm_64bit=1# Disable compensation for displays with overscandisable_overscan=1[cm4]# Enable host mode on the 2711 built-in XHCI USB controller.# This line should be removed if the legacy DWC2 controller is required# (e.g. for USB device mode) or if USB support is not required.otg_mode=1[all][pi4]# Run as fast as firmware / board allowsarm_boost=1[all]