I recently installed Ubuntu Studio. It worked fine the other night, then I shut down my PC and went to bed. When I booted it up the next day, the resolution was stuck at 640x480 and it won't give me any options for aspect ratio or refresh rate.
I ran xrandr and got this message:
xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 640 x 480, maximum 640 x 480 default connected 640x480+0+0 0mm x 0mm 640x480 73.00*
I'm running Ubuntu 19.10 on an HP Z400 workstation. My monitor is quite old, a Samsung 932BW LCD monitor with a native resolution of 1440x900 and a refresh rate of 75hz, an aspect ratio of 16:10, with a contrast ratio of 1000.1/3000.1 (dynamic).
I don't know if it makes a difference, but it's VGA1 hookup is running through a Display Port converter into my PC. It worked fine last night, I don't know what happened, and this tiny resolution has basically rendered the OS unusable for the purposes I need (audio/video editing). Please help, I'm a total n00b.
Update: I reinstalled Ubuntu Studio and things worked fine. Then it asked me if I wanted to install software updates. I did so and then restarted the workstation and now the resolution problem has cropped up again, so it's something to do with one of those updates.
51 Answer
Resolve (for me) Open applications menu and go to Settings -> Additional Drivers -> select xserver-xorg-video-nouveau -> apply -> reboot
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