Re: [Intel-gfx] [REGRESSION] Linux 4.9-rc4: gfx glitches on Intel Sandybridge (was: Re: Linux 4.9-rc4)

Martin Steigerwald
2016-11-08T15:18:03Z

Am Dienstag, 8. November 2016, 16:11:31 CET schrieb Martin Steigerwald:
> Am Montag, 7. November 2016, 19:09:36 CET schrieb Jani Nikula:
> > On Mon, 07 Nov 2016, Martin Steigerwald <martin@lichtvoll.de> wrote:
> > > It is also the same kind of corruptions as shown in
> > >
> > > [Bug 177701] warning in intel_dp_aux_transfer
> > > https://bugzilla.kernel.org/show_bug.cgi?id=177701
> > >
> > > Just compare
> > >
> > > https://bugzilla.kernel.org/attachment.cgi?id=241801
> > >
> > > with
> > >
> > > https://martin-steigerwald.de/tmp/display-issues-with-kernel-4.9-rc4.png
> > >
> > >
> > > However that bug report links to
> > >
> > > https://bugs.freedesktop.org/show_bug.cgi?id=97344
> > >
> > > yet the patch mentioned in there does not fix the issue. So I wonder
> > > whether bug #97344 and bug #177701 are really the same.
> >
> > They are the same, it's just that #177701 conflates two issues, a
> > warning (tracked at fdo #973449) and a graphics corruption. The latter
> > appears to be https://bugs.freedesktop.org/show_bug.cgi?id=98402.
> >
> > The fix has now been pushed to drm-intel-fixes branch of
> > http://cgit.freedesktop.org/drm-intel, which is -rc4 plus half a dozen
> > latest fixes. Please try that and report back.
>
> For now commit 54905ab5fe7aa453610e31cec640e528aaedb2e2 of drm-intel-fixes

I ment not exactly this commit, but this is the last commit in the branch as I
compiled the kernel.

> branch seems to work okay. I can only test with laptop display at the
> moment. But I will test with external display this evening – in case the
> issue at hand is DisplayPort related.
>
> I will add this information to fdo bug 98402 as well.
>
> Thanks,
> Martin
>
> > > Of course I can report a bug at fdo as well, but I am a bit confused
> > > whether it may not already have been reported. Well I hope I get a
> > > chance to report it there as well and you get to decide.
> >
> > If drm-intel-fixes doesn't fix the issue for you, please file a *new*
> > bug over at the freedesktop.org bugzilla.
> >
> > BR,
> > Jani.

--
Martin