I recently installed Lubuntu 20.04. I initially selected the option to install Lubuntu from the live usb; however, I found that the resolution was so bad (640x480) that I couldn’t run the installation (I couldn’t see enough of the installer window to select the installation options), and I could not change the resolution to my monitor’s native 1920x1080. So I rebooted and ran the “graphics safe” version. Oddly enough, this version got the resolution right up to 1920x1080, so I was able to do the installation no problem.
Now that 20.04 is installed and fully updated, I am again stuck at 640x480, which makes most tasks unmanageable. I’ve tried:
xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync xrandr --addmode DisplayPort-0 1920x1080_60.00 xrandr --output DisplayPort-0 --mode 1920x1080_60.00
which resulted in:
xrandr: Configure crtc 0 failed
My machine has an integrated AMD GX-420GI SOC: quad-core APU with R7E graphics (capable of dual 4K displays), plus the 1920x1080 worked fine in the “safe graphics” live usb version.
What can I do to set the resolution correctly?