jkugler

I recently installed Ubuntu server on a laptop with a 4K display. While the installer appears to be in text, it apparently uses a graphical mode, and setting vga=799 in the kernl boot parameters did not work.

To decrease the resolution, you have to pass a kernel boot parameter with the monitor "name" as seen by edid.

You can do this to list monitors without xrandr

find /sys/devices -name "edid"

That will produce a listing like this: