Bug#689268: [wheezy] Intel HD 4000 (Ivy Bridge) graphics freeze

[Jonathan Nieder <jrnieder@gmail.com>]

Per Foreby wrote:

> However my computer has been running without any problems for 11 days, so
> whatever caused this bug seems to be fixed in the 3.5.5 kernel.

Drat.  Ok.

To recap:

 * Asus P8Z77-V LE.

 * Newish system.  Works fine under load (e.g., Folding@Home) but when
   you started normal interactive use it started to freeze a few times
   a day while you were interacting with it (in particular, the freeze
   happens around the same time as a keyboard or mouse action).

 * The freeze is a bad one --- the fan spins down, the NIC stops
   responding, caps lock doesn't light up, ctrl+alt+del and magic
   sysrq have no effect.  No messages about it in netconsole.

 * Happens reliably (how reliably?  >80% of the time?) after a few
   hours of sustained use (?)

 * Logs available in the bug log.  No obvious smoking guns. ;-)

 * Changing the amount of memory allocated to the integrated GPU in
   BIOS doesn't change anything.

 * The above describes 3.2.23-1.  Based on a week and a half of running
   3.5.5-1~experimental.1 it doesn't seem to be affected.

None of the changes from 3.2 to 3.5.5 are jumping out as likely
candidates for the fix, but that's a pretty wide range.  How reliably
can you reproduce the hang on a known-bad kernel?  If you have time to
try 3.2.30-1 from sid, 3.4.4-1~experimental.1 from
http://snapshot.debian.org/package/linux/ and 3.3.6-1~experimental.1
from http://snapshot.debian.org/package/linux-2.6/ then that could
help narrow down the search.

Thanks again for your help and patience.

Regards,
Jonathan