Re: [Intel-gfx] Bad flicker on skylake HQD due to code in the 4.7 merge window

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On Fri, 17 Jun 2016, Daniel Vetter <daniel@xxxxxxxx> wrote:
> On Thu, Jun 16, 2016 at 03:42:12PM -0700, James Bottomley wrote:
>> On Thu, 2016-06-16 at 14:29 -0700, James Bottomley wrote:
>> > On Thu, 2016-06-16 at 23:24 +0200, Daniel Vetter wrote:
>> > > I guess we'll need the bisect on this one to make progress.
>> > 
>> > Sigh, I was afraid that might be the next step.
>> 
>> OK, I have a curious data point.  I assumed the problem would be
>> somewhere in the drm update, so I started bisecting that at the top. 
>>  However, the top most commit:
>> 
>> commit 1d6da87a3241deb13d073c4125d19ed0e5a0c62c
>> Merge: 1f40c49 a39ed68
>> Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
>> Date:   Mon May 23 11:48:48 2016 -0700
>> 
>>     Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
>> 
>> Isn't actually bad.  There's no flicker here, so whatever caused the
>> problem came from some update after this.
>
> There was a fixes pull after this. Might be worth it to restrict to just
> the i915 changes, which are just 5b4fd5b1111b1230cd037..157d2c7fad0863222
>
> Looking at those nothing seems to stick out which might explain what's
> happening for you.

This should be easy enough to try before bisecting:
http://patchwork.freedesktop.org/patch/msgid/1466162081-12042-1-git-send-email-mika.kahola@xxxxxxxxx

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Technology Center
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