2009/4/14 Alex Deucher <alexdeuc...@gmail.com>: > Both heads are probably using the same crtc, but xrandr isn't smart > enough to assign a different one. You can see what crtc is in use by > running xrandr --verbose. You can assign a different crtc to the > other head like so: > xrandr --output DVI-1 --crtc 1 --mode 1280x1024 --left-of DVI-0
Thanks for the suggestion. Unfortunately, it doesn't solve my problem. Here are the results of some tests obtained using the following minimal xorg.conf file: Section "Screen" Identifier "screen" SubSection "Display" Depth 24 Virtual 2600 1024 EndSubSection EndSection The output of xrandr --verbose at each step is given in the attached file. 1/ startx (window manager e16) results in monitors in clone mode as expected. DVI-0 and DVI-1 do indeed use the same crtc (0). 2/ xrandr --output DVI-0 --crtc 0 --mode 1280x1024 nothing happens (as expected) 3/ xrandr --output DVI-1 --crtc 1 --mode 1280x1024 The monitor connected to DVI-0 enter power save mode. 4/ xrandr --output DVI-0 --off nothing happens except that the following command wouldn't change anything without it. 5/ xrandr --output DVI-0 --crtc 0 --mode 1280x1024 DVI-0 monitor goes on, DVI-1 monitor goes into power save mode Another "funny" issue is that after running startx and without "playing" with xrandr, if I switch off the monitor connected to DVI-1 then the mouse pointer doesn't move on the other monitor. This problem doesn't exist when the monitor connected to DVI-1 is on and the other one off.
log.radeon
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