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

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Am Montag, 7. November 2016, 19:09:36 CET schrieb Jani Nikula:
> On Mon, 07 Nov 2016, Martin Steigerwald <martin@xxxxxxxxxxxx> 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 
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
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