Comment 49 for bug 946899

Same here, but the couple of working/non-working kernel is 3.5.0-25/3.5.0-26.

My hardware is a Dell Inspiron N7110 with a i7-2670QM CPU and a NVIDIA
GeForce GT 540M disabled using bbswitch :

[ 46.492299] bbswitch: version 0.6
[ 46.492305] bbswitch: Found integrated VGA device 0000:00:02.0:
\_SB_.PCI0.GFX0
[ 46.492309] bbswitch: Found discrete VGA device 0000:01:00.0:
\_SB_.PCI0.PEG0.PEGP
[ 46.492508] bbswitch: detected an Optimus _DSM function
[ 46.492513] bbswitch: disabling discrete graphics
[ 46.610983] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is off

2013/4/3 Niklas Edmundsson <email address hidden>:
> Same here on precise amd64. Booting with 3.2.0-39 X hangs shortly after
> login with the earlier mentioned hangcheck messages in the kernel log
> (machine is remotely login:able). Reverting to 3.2.0-38 yields a stable
> machine.
>
> This is on a machine with an Intel i5 CPU on an ASUS P8H67-V
> motherboard, with the latest&greatest BIOS (upgrading the BIOS made no
> difference).
>
> ** Tags added: regression-update
>
> --
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> report.
> https://bugs.launchpad.net/bugs/946899
>
> Title:
> [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU
> hung
>
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