915gm/945gm/XAA lockup with gray blocks when switching video mode

[Bryce Harrington]

On Wed, Oct 10, 2007 at 09:29:58AM +0200, Michel D?nzer wrote:
> 
> On Wed, 2007-10-10 at 00:17 -0700, Bryce Harrington wrote:
> > 
> > When switching video mode (VT switch, restart, hibernate, suspend,
> > shutdown, etc.) on 915gm and 945gm laptops, occasionally the system
> > locks up, showing blinking gray blocks, as in this video:
> >   http://launchpadlibrarian.net/8783569/SSA43053.AVI
> > 
> > Steps to reproduce:
> >   1. Disable desktop effects (Compiz) and enable desktop effects again.
> >   2. Switch to VT1 and switch back to VT7.
> >   3. Repeat steps 1 and 2 several times.
> > 
> > Commonly, the following appears in the Xorg.0.log:
> >   (II) intel(0): [drm] removed 1 reserved context for kernel
> >   (II) intel(0): [drm] unmapping 8192 bytes of SAREA 0xf89c1000 at 0xb7b65000
> 
> These should only appear on server shutdown though, right?

That could be; certainly we don't see these two lines 100% of the time
when experiencing this bug, so they could be superfluous.
 
> >   (EE) intel(0): I830 Vblank Pipe Setup Failed 0
> 
> This is because the X driver calls the DRM_I915_SET_VBLANK_PIPE ioctl
> after de-initializing the DRM, as seen above. It should be harmless.

Okay, thanks.

Bryce