Subject: Re: [BUG][REGRESSION] mangled display since -rc1
To: Jani Nikula <jani.nikula@linux.intel.com>,
        Martin Steigerwald <martin@lichtvoll.de>
References: <da26da99edcd68c05ef63a28749eff37@posteo.de>
 <87zilb8zp9.fsf@intel.com> <d70acadc-ef21-0752-0502-feeaf1d25987@posteo.de>
 <1950398.JsbNW0lAGz@merkaba> <0e7529fa-6f48-fc31-8d25-18a836171d8c@posteo.de>
 <87h97j8a4q.fsf@intel.com>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>,
        Joerg Roedel <jroedel@suse.de>,
        Linux kernel <linux-kernel@vger.kernel.org>,
        torvalds@linux-foundation.org, daniel.vetter@intel.com
From: Martin Kepplinger <martink@posteo.de>
Message-ID: <8d84af52-489b-508f-d87d-52702713a164@posteo.de>
Date: Sun, 13 Nov 2016 22:32:53 +0100
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Am 2016-11-07 um 18:36 schrieb Jani Nikula:
> On Mon, 07 Nov 2016, Martin Kepplinger <martink@posteo.de> wrote:
>> Am 2016-11-07 um 17:01 schrieb Martin Steigerwald:
>>> Hello.
>>>
>>> Am Montag, 7. November 2016, 16:34:35 CET schrieb Martin Kepplinger:
>>>> Chris Clayton wrote off list and the mentioned patch fixes the problem
>>>> for me too, as it does for others. I hope it make it's way into the tree
>>>> soon:
>>>
>>> With 4.9-rc4 I have corruptions that look like the ones reported in this 
>>> thread.
>>>
>>> I reported my finding on LKML thread about 3.9-rc4. And in Bugzilla in a bug 
>>> report with an attachment that shows the same type of corruptions as here in 
>>> this thread:
>>>
>>> https://patchwork.freedesktop.org/patch/116808/
>>>
>>> mentioned in the other bug report and the following LKML thread does not fix 
>>> the issue for me:
>>>
>>> Re: [REGRESSION] Linux 4.9-rc4: gfx glitches on Intel Sandybridge (was: Re: 
>>> Linux 4.9-rc4)
>>> https://lkml.org/lkml/2016/11/6/70
>>>
>>> https://bugzilla.kernel.org/show_bug.cgi?id=177701#c4
> 
> That bug conflates two issues, with the main issue being unrelated to
> corruption.
> 
>>> In my case it looks like this:
>>>
>>> https://martin-steigerwald.de/tmp/display-issues-with-kernel-4.9-rc4.png
>>>
>>>
>>>  I have a busy week, so I won´t to any bisecting at the moment. I am
>>> happy to test another patch during breaks between holding the
>>> training, but please point me specifically to what patch to
>>> test. Thank you.
>>
>> this one: I just replaced max with roundup manually:
> 
> As I wrote in another thread, the fix has now been pushed to
> drm-intel-fixes branch of http://cgit.freedesktop.org/drm-intel. It's
> -rc4 plus half a dozen fixes, including "drm/i915: Round tile chunks up
> for constructing partial VMAs" which should fix the corruption.
> 
> Please try that, and report back. If it doesn't fix the issue, please
> file a bug at the freedesktop.org bugzilla.
> 
> BR,
> Jani.
> 
Fixed in -rc5, thanks!

                       martin