On 9 February 2011 09:40, Chris Wilson <chris@chris-wilson.co.uk> wrote:

> On Wed, 9 Feb 2011 00:27:52 +0000, Pedro Ribeiro <pedrib@gmail.com> wrote:
> > Hi,
> >
> > I've been having unreliable operation when hibernating ever since
> 2.6.37-rc5
> > (the first 2.6.37 I tried).
> > With 2.6.36 I never had a problem.
>
> Wrong, you just never saw it.
>
> commit 9334ef755f060e251f3f395caeda1a58b6834ea3
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date:   Fri Jan 28 11:53:03 2011 +0000
>
>    drm: Don't switch fb when disabling an output
>
>    In drm_crtc_helper_set_config, we call drm_crtc_helper_set_mode which
>    may return early and do no operation if the crtc is to be disabled. In
>    this case we merrily swap to the new fb, discarding the old_fb believing
>    that it has been cleaned up. However, due to the early return, the
>    old_fb was not presented to the backend for correct reaping, and nor was
>    the new one - which is about to be reaped via the
>    drm_helper_disable_unused_functions(), leading to incorrect refcounting
>    of the pinned objects.
>
>    Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=27722
>    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29857
>    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29230
>    Tested-by: Takashi Iwai <tiwai@suse.de>
>    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
>
> --
> Chris Wilson, Intel Open Source Technology Centre
>

Thanks for the prompt reply.

I assume this will be included in stable?

For the moment I'll just apply the patch to my build.

Regards,
Pedro