I have a system built using the 7 inch touchscreen and a Raspberry Pi 5 using the latest bookworm lite OS. The application runs as a service on boot and writes a touch menu directly to the framebuffer (/dev/fb0) and then acts on the touch commands.
The application is the Portsdown 5, a development of the Portsdown 4 and Portsdown 2020 Amateur Television transceivers which have used this same technique for the last 8 years.
In recent builds ( I had not seen the problem using earlier builds of bookworm lite) the touch menu gets over-written in the displayed framebuffer by the initial logon screen with an updated IPV4 or IPV6 address every time that the IP address changes. This leaves the user without the touch menu that I want to display to them.
I recognise that, usually, this refresh would be seen as a really useful feature; I just want to disable it for my application. Is there a way to disable this IP-address-change-induced refresh of the logon screen?
Thanks
Dave
The application is the Portsdown 5, a development of the Portsdown 4 and Portsdown 2020 Amateur Television transceivers which have used this same technique for the last 8 years.
In recent builds ( I had not seen the problem using earlier builds of bookworm lite) the touch menu gets over-written in the displayed framebuffer by the initial logon screen with an updated IPV4 or IPV6 address every time that the IP address changes. This leaves the user without the touch menu that I want to display to them.
I recognise that, usually, this refresh would be seen as a really useful feature; I just want to disable it for my application. Is there a way to disable this IP-address-change-induced refresh of the logon screen?
Thanks
Dave
Statistics: Posted by g8gkq — Wed Jun 04, 2025 8:46 am