Hi, I'm running a dummy X11 server (Xorg 1.15.1 on Ubuntu 14.04), using the configuration attached.
I am able to change resolution using xrandr, as long as I use the ones that are setup when the server is started (either the default ones, or the ones I add in the Monitor section). I'd like to be able to add new arbitrary resolutions using output from gtf, but this fails: # xrandr --newmode 800x632_60.00 40.24 800 832 912 1024 632 633 636 655 -HSync +Vsync # xrandr --addmode default 800x632_60.00 xrandr: Failed to get size of gamma for output default (I guess this is harmless: the mode is added) # xrandr --output default --mode 800x632_60.00 --verbose xrandr: Failed to get size of gamma for output default crtc 0: disable screen 0: 800x632 211x167 mm 96.09dpi crtc 0: 800x632_60.00 60.0 +0+0 "default" xrandr: Configure crtc 0 failed crtc 0: disable screen 0: revert crtc 0: revert A similar method works fine with intel drivers. Any idea if this is supposed to work, or if I am doing something wrong? Or is this something that the dummy driver does not support? Thanks a lot for your help, Best regards, Nicolas
xorg.conf
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