Bug#572880: video-radeon: frequent lockups on suspend to disk/resume with KMS

[Michal Suchanek <michal.suchanek@ruk.cuni.cz>]

On 03/09/2010 03:41 PM, Nix wrote:
> On 7 Mar 2010, Hramrach verbalised:
>
>    
> > I have upgraded the system to get KMS working and now the system would
> > lockup about once in three tries when doing suspend to disk/resume.
> >
> > I suspect this is related to KMS but I had to upgrade quite a bit of
> > stuff to get it working so I cannot be sure.
> >      
> Bug<https://bugs.freedesktop.org/show_bug.cgi?id=26872>  is a bisection
> of a 100%-reproducible (for me) lockup in KMS suspension in 2.6.33. It
> may be related. (Then again it may not: your lockup is not consistently
> reproducible. I'm not sure how we can get useful debugging info out at
> freeze time. Will even a netconsole work?)
>    
Mine does not seem to be caused by KMS, the same kernel locks up on 
suspend without KMS.

Also I see a pattern with the lockups: when I test if suspend/resume is 
working it does not lockup most of the time but when I am finished with 
testing and start normal applications (most notably Firefox) the system 
locks up on suspend most of the time.

I do not see any messages at the point when the sytem locks up.

The only message on the screen is

s2disk: Snapshotting system.

Normally I get additional messages before and after this message but in 
this case it stays indefinitely with the fan running at top speed.

Thanks

Michal