Dual monitor with ATI Radeon HD 3870
I have got 12.04 on my Desktop machine. I have also two dell monitors 24" and 22". My graphics card is "04:00.0 VGA compatible controller: ATI Technologies Inc R680 [Radeon HD 3870 x2]". I have searched and tried proposed solutions here and none work. I also tried xrandr but it behaves strangely. With xrandr, I cannot get the resolution right and the Fluxbox bottom bar is in the extended monitor (22"). Is there an easy way to get the extended desktop working correctly with Radeon HD 3870?
1 Answer
To fix it:
monitor 1 (24",1920x1080): monitor 2 (22",1680x1050):
info about the monitors:
$ xrandr
Screen 0: minimum 320 x 200, current 3600 x 1080, maximum 8192 x 8192
DVI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm 1920x1080 60.0*+ 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1
DIN disconnected (normal left inverted right x axis y axis)
DVI-1 connected 1680x1050+1920+0 (normal left inverted right x axis y axis) 473mm x 296mm 1680x1050 60.0*+ 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 Command that actually sets the monitor:
$ xrandr --auto --output DVI-0 --mode 1920x1080
$ xrandr --auto --output DVI-1 --mode 1680x1050 --right-of DVI-0
