Raspberry Pi 4 Ubuntu Desktop 4k Rerolution problem fix
Adding the following lines to /boot/firmware/usercfg.txt solved it for me:
disable_overscan=1
hdmi_force_hotplug=1
hdmi_enable_4kp60=1
Raspberry Pi 4 Ubuntu Desktop 4k Rerolution problem fix
Adding the following lines to /boot/firmware/usercfg.txt solved it for me:
disable_overscan=1
hdmi_force_hotplug=1
hdmi_enable_4kp60=1