I just installed Ubuntu 14.04 but my screen resolution is set too low: I tried to add a new one but i keep getting
xrandr: Failed to get size of gamma for output default
I tried :
$ xrandr -q
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 primary 640x480+0+0 0mm x 0mm
640x480 73.0*
1024x768_60.00 (0x194) 63.5MHz
h: width 1024 start 1072 end 1176 total 1328 skew 0 clock 47.8KHz
v: height 768 start 771 end 775 total 798 clock 59.9Hz
(I didn't have this problem on Ubuntu 13.10 13.04 12.04)
$ xrandr --newmode "1024x768_60.00" 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync
xrandr: Failed to get size of gamma for output default
$ lspci | grep VGA
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 771/671 PCIE VGA Display Adapter (rev 10)
============================================================================
I did an update yesterday on my Ubuntu 12.04 and it ruined my screen resolution due to something about 1204_HWE_EOL
I'm back to Ubuntu 14.04 and the only way to get a nice screen resolution is to start from the recovery menu then resume boot.
Best Answer
I was having the same issue with the resolution. I'm using VirtualBox and the resolution only had one resolution option.
As soon as it booted back up the resolution was already fixed.