Re: [BUG][REGRESSION] mangled display since -rc1

From: Jani Nikula
Date: Mon Nov 07 2016 - 12:38:13 EST

On Mon, 07 Nov 2016, Martin Kepplinger <martink@xxxxxxxxx> 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:
>> 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)

That bug conflates two issues, with the main issue being unrelated to

>> In my case it looks like this:
>> I have a busy week, so I wonÂt 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 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 bugzilla.


Jani Nikula, Intel Open Source Technology Center