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

Michel Dänzer michel at tungstengraphics.com
Wed Oct 10 00:29:58 PDT 2007

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?

>   (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.

Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer

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