I have a situation where unplugging an external monitor and running an xrandr sequence to return the screen to the internal display sometimes causes the i915 driver to wig out.
In perusing the intel-gfx archives, I see http://lists.freedesktop.org/archives/intel-gfx/2010-May/006957.html makes a reference to "commit 9f54107f866a25cf670f81f7c52b8c108728c6a5", but I do not see that commit in the drm-intel kernel. I am looking at git:// git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git. Is this not the right repo? The xrandr sequence to switch from external monitor to internal display is: xrandr --output LVDS1 --mode 1280x800 xrandr --output VGA1 --off xrandr --fb 1280x800 To switch back to the external monitor: xrandr --output LVDS1 --off xrandr --output VGA1 --mode 1920x1200 xrandr --fb 1920x1200 I have tried rearranging the order of commands, and this sequence reduces the likelihood of failure: xrandr --output VGA1 --off xrandr --output LVDS1 --mode 1280x800 xrandr --fb 1280x800 But I still occasionally see the failure. Stressing the driver a bit with "echo 7 > /sys/module/drm/parameters/debug" seems to exacerbate the situation (ie, increase the likelihood of failure). Any ideas? bryan.
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