I have just installed Ubuntu 14.04. I have two monitors and the monitor on the left has a different resolution and I can't change it. (See: screen shot)
Output of xrandr:
Screen 0: minimum 8 x 8, current 2560 x 1080, maximum 16384 x 16384
DVI-I-0 connected primary 640x480+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
640x480 59.9*+
320x240 60.1
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected 1920x1080+640+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.0*+
1680x1050 60.0
1440x900 75.0 59.9
1280x1024 75.0 60.0
1280x720 60.0
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 72.8 59.9
DP-1 disconnected (normal left inverted right x axis y axis)
Thanks in advance.