Comment 26 for bug 197153

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to be removed (liw) wrote :

I have this problem on my system as well. I use the radeonhd driver. It goes away if I set /apps/gnome-settings-daemon/plugins/xrandr/active and /apps/gnome_settings_daemon/plugins/xrandr/active both to false (perhaps one of the might have been enough).

Based on Bryce's instructions on IRC, I verified that the driver seems to have xrandr 1.2 support:

xrandr -q reports sensible stuff

xrandr --output VGA_1 --mode 1024x768 sets the mode correctly

xrandr --output VGA_1 --auto correctly resets the mode back to what it should be