Bug#689268: linux-image-3.2.0-3-amd64: Intel HD 4000 (Ivy Bridge) graphics freeze

[Ingo <ingo.steiner@gmx.net>]

Am 10.01.2013 09:39, schrieb Riku Voipio:

> getting hangs on anything other than the Debian 3.2.32-1 has
> been challenging. If if's just timing based, I might just have
> been lucky during my bisects.

Here vanilla 3.4.24 from kernel.org runs absolutely stable since a few
weeks. But me came up another idea:

'modinfo i916' list an option which appears to be a watchdog function:

"parm:           enable_hangcheck:Periodically check GPU activity for
detecting hangs. WARNING: Disabling this can cause system wide hangs.
(default: true) (bool)"

which actually describes the symptoms. Could it be that in the
Debian-kernel either the hangs are not detected securely, or that it
just fails to reset the module?

/Ingo