[Intel-gfx] Suspend/resume problems on Broadwell

[phoebe at quasiparticle.net]

On Fri, 27 Feb 2015 18:59:07 +0100, Daniel Vetter wrote:
> Smells like something is wrong in bdw-land.
> 
> Can you please retest with latest drm-intel-nightly from
> http://cgit.freedesktop.org/drm-intel or alternatively 4.0-rc kernels?
> Starting with 4.0 we're using the execlist cmd submission support,
> which might help.

I've just tested with 4cf8e7747f184a0616b547b307d63b65298c88a7,
drm-intel-nightly. I could not reproduce the suspend/resume
problems with that kernel, and the "timed out trying to stop ring"
error is also gone. I still see loads of unclaimed register warnings
while running GL programs, though.

> Thanks, Daniel
> 
> 
> On Fri, Feb 27, 2015 at 6:27 PM,  <phoebe at quasiparticle.net> wrote:
> > On Fri, 27 Feb 2015 00:07:41 +0100, phoebe at quasiparticle.net wrote:
> >> Hi,
> >>
> >> I'm having a few problems with i915 on my Broadwell Thinkpad
> >> (T450s, i7-5600U) with kernel 3.19, apparently suspend/resume
> >> related.
> > […]
> >> Also, it seems that running or having run a GL application has some
> >> impact on this. With an instance of glxgears running during
> >> suspend/resume, this doesn't seem to happen. Moreover, running a GL
> >> app seems to fix the problem.
> >
> > Correction: running a GL app during suspend/resume prevents bad
> > things (and the "timed out trying to stop ring" error, apparently).
> > Running GL after resume only partly restores original state,
> > sometimes font rendering is broken for random characters - they
> > just don't display anymore. It also seems that only one font and
> > only one size of that one font is affected. I'm guessing that's a
> > problem in X, perhaps?
> >
> >> Is this known already, or can I somehow help to fix this?
> >>
> >>
> >> Greetings,
> >> Phoebe
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch