[Intel-gfx] nasty suspend resume problem with sandybridge

[Daniel Vetter]

On Mon, Feb 13, 2012 at 17:53, Oleksij Rempel (fishor)
<bug-track at fisher-privat.net> wrote:
> Am 13.02.2012 17:41, schrieb Daniel Vetter:
>> On Mon, Feb 13, 2012 at 11:44:00AM +0100, Oleksij Rempel (Alexey Fisher) wrote:
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA1
>>>
>>> Am 13.02.2012 11:18, schrieb Daniel Vetter:
>>>> On Sat, Feb 04, 2012 at 07:17:01PM +0100, Oleksij Rempel (fishor)
>>>> wrote:
>>>>> i do not know if this is really graphic related problem, so i
>>>>> need your help. even excluding some thing will help.
>>>>>
>>>>> Please take look at this bug:
>>>>> https://bugzilla.kernel.org/show_bug.cgi?id=42728
>>>>
>>>> Judging from your ehci workaround I think your suspend/resume issue
>>>> is not i915 related. You mention though somewhere that you also
>>>> experience memory corruption issues after hibernat (assuming I've
>>>> read the comments correctly). We are aware of memory corruptions
>>>> issues due to i915.ko when hibernating, unfortunately no one has
>>>> yet root-caused this. See e.g.
>>>>
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=35648
>>>
>>> thx, for the response.
>>>
>>> unfortunately this memory corruption appears not in S4, but after
>>> filed S3.
>>> Looks like some part entered S3 state and never come back, even after
>>> poweroff. I think it, because in some cases power-led blinking after
>>> poweroff - which indicate S3 state. Are there any thing to check to
>>> see what is misconfigured?
>>>
>>> I agree, that i915 is not the reason of this problem, but i915 make it
>>> impossible to get oops trace! Any chance to get it work?
>>
>> As already mentioned by Jesse in the bugzilla, just blacklist it. We don't
>> really support nomodeset (because for things like suspend/resume it's
>> actually impossible to properly support).
>> -Daniel
>
> I did response on the bugzilla - blacklisting the module do not help. i
> get just black screen, no oops trace. Are there any way to get trace
> with modeset?

Well, if you've checked that none of the i915, drm and intel-agp
modules are loaded with lsmod there really shouldn't be any difference
cause by modeset or nomodeset. I.e. if that's the case, your black
screen is cause by a suspend/resume failure caused by another driver.
-Daniel
-- 
Daniel Vetter
daniel.vetter at ffwll.ch - +41 (0) 79 364 57 48 - http://blog.ffwll.ch