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Date:   Mon, 07 Nov 2016 19:09:36 +0200
From:   Jani Nikula <>
To:     Martin Steigerwald <>
Cc:     Linus Torvalds <>,
        Intel Gfx Mailing List <>,
        Linux Kernel Mailing List <>
Subject: Re: [Intel-gfx] [REGRESSION] Linux 4.9-rc4: gfx glitches on Intel      Sandybridge (was: Re: Linux 4.9-rc4)

On Mon, 07 Nov 2016, Martin Steigerwald <> wrote:
> It is also the same kind of corruptions as shown in
> [Bug 177701] warning in intel_dp_aux_transfer
> Just compare
> with 
> However that bug report links to
> 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

The fix has now been pushed to drm-intel-fixes branch of, which is -rc4 plus half a dozen
latest fixes. Please try that and report back.

> 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 bugzilla.


Jani Nikula, Intel Open Source Technology Center

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