Thanks for reading this. I have a Khadas Vim. My telvision does not support the standard high resolution of Ubuntu (1920x1080), so I am trying to lower the resolution on another screen in order to get to an acceptable resolution.
When I go to “Configure display settings” it says " Monitor unknown".
I tries xrandr in the following fashion: https://askubuntu.com/questions/377937/how-to-set-a-custom-resolution
But i kep gettin errors like: Failed to get size of gamma for output default
Is there a solution for this? I am new to Ubuntu.