I have this Ubuntu (12.04.4) netbook hooked up to a 55" screen to display slides and info. It was running fine for quite a while and was set up not to go to screen saver or anything. I think there was a power outage last night so I came in and pressed the power button to turn it on. Now when I turn the computer on, the screen is black. Here's the state of things...
user@computer:~$ xrandr Screen 0: minimum 320 x 240, current 320 x 240, maximum 8192 x 8192 VGA1 disconnected (normal left inverted right x axis y axis) LVDS1 connected (normal left inverted right x axis y axis) 1024x768 60.0 + 60.0 800x600 60.3 56.2 640x480 59.9 DVI1 connected (normal left inverted right x axis y axis) 1920x1080 60.0 + 1600x900 60.0 1440x900 59.9 1360x768 59.8 60.0 1280x800 59.8 1280x720 60.0 1024x768 60.0 800x600 60.3 640x480 60.0 DP1 disconnected (normal left inverted right x axis y axis)
I SSH in tried to do something like:
xrandr --output DVI1 --mode 1920x1080
That didn't throw an error but didn't make the screen stop being black. I read that using "--off" might help ( http://www.linuxine.com/story/xrandr-cannot-find-crtc-output-vga1 ) so I did something like this:
xrandr --output DVI1 --off xrandr --output LVDS1 --off xrandr --output DVI1 --mode 1920x1080
That worked! Then I kept sitting there for a few minutes and after maybe 5 or 10 minutes. The screen went black again! What is going on here...? Is there some sort of corruption I can resolve? Why would the screen go black again after it has already been initialized with xrandr?
EDIT: I forgot to mention... when I reboot, it shows the BIOS on the monitor. It's only after Ubuntu starts up that it goes black. This is what makes me thing it is a software or configuration problem.