X.org crashes on xrandr (assertion failure in intel video driver)

[Marius Gedminas]

Binary package hint: xserver-xorg-video-intel

xrandr started crashing my X server occasionally, after the upgrade to Intrepid.

I've a Lenovo T61 laptop with Intel GMA X3100 (965GM) video. Sometimes I connect an external monitor and use xrandr to resize the desktop over both monitors. When I disconnect it later and use xrandr to turn off the extra monitor, my X server sometimes crashes and I'm presented with the GDM login screen. In those occasions I see this error message at the very end of /var/log/gdm/:0.log.1:

  X: intel_context.c:1020: UNLOCK_HARDWARE: Assertion `intel->batch->cliprect_mode != REFERENCES_CLIPRECTS' failed.

xserver-xorg-video-intel is version 2:2.4.1-1ubuntu10.1. I use compiz, which may or may not be relevant.

[Marius Gedminas (mgedmin)]

This looks like a straight duplicate of bug 298226. Sorry I missed it when I initially filed the report.