Re: Corrupted files after suspend to disk

[Andreas Hartmann <andihartmann@01019freenet.de>]

Dave Jones wrote:
> On Mon, Mar 12, 2012 at 02:24:00PM +0100, Andreas Hartmann wrote:
>  
>  > >>>>> This is happening to me as well. Something like 1 resume out of 5 goes
>  > >>>>> wrong this very same way.
>  > >>>>>
>  > >>>>> This is thinkpad x200s.
>  > >>>>>
>  > >>>>> All the userspace is segfaulting all over the place (most frequently in
>  > >>>>> libselinux for some reason).
>  > >>>>>
>  > >>>>> I am not able to verify the 'drop_caches' theory, as I can't invoke a
>  > >>>>> single command that wouldn't crash.
>  > >>>>
>  > >>>> The question is how should we proceed?
>  > >>>> I've reported this issue one year (!!!) ago.
>  > >>>
>  > >>> Hmm, 3.3-rcX seems to be the first version when it started to happen to
>  > >>> me. I take it that you have seen this also with 3.2? 3.1?
>  > >>
>  > >> Quote from my very first email:
>  > >> "I'm facing a very strange problem on my netbook (Lenovo Ideapad S10)
>  > >> running Linux 2.6.37.4."
>  > > 
>  > > So we both seem to have Lenovos at least. I thus wanted to verify whether 
>  > > the problem will trigger with thinkpad_acpi removed, but it oopsed while 
>  > > rmmoding :) I will start looking into this right away.
>  > > 
>  > > Is your system using thinkpad_acpi as well?
>  > 
>  > I dont't think, that it is lenovo related as I'm having a MSI machine.
>  > 
>  > https://bugzilla.novell.com/show_bug.cgi?id=732908
>  > 
>  > Following the link, you are able to compare the used chips - maybe there
>  > are some equal components?
> 
> This looks like the i915 corruption problem mentioned in a few other threads.
> 
> if you compare the hexdump of the good/bad files, you find that the corruption
> happens in 8x 4 byte writes of either 0x00000000 or 0x00aaaaaa.
> 
> KeithP clued me in last week that that looks like an ARGB pixel quad, so these
> writes are likely 8 pixel strips.

Thanks Dave. I disabled i915 (with nomodeset) and voila, the problem
disappears. As I already know, that the problem isn't X-related (I saw
it even without any X involved, only with runlevel 3 and nothing more),
the problem seems to be now narrowed down to the relevant component.


Hoping to get a fix soon,
regards,
Andreas