[Bug 104498] New: GeminiLake/KabyLake video playback flicker on Chrome

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104498

            Bug ID: 104498
           Summary: GeminiLake/KabyLake video playback flicker on Chrome
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: chiu at endlessm.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 136562
  --> https://bugs.freedesktop.org/attachment.cgi?id=136562&action=edit
Flickering while playing videos on Chrome

I have 2 laptops from ASUS (X542UQ KabyLake + NVIDIA 940MX and X507MA
GemniLake) which will have the flickering problem while playing videos in
https://yandex.ru/video/search?text=%D1%84%D0%B8%D0%BB%D1%8C%D0%BC%D1%8B%20%D0%BF%D1%80%D0%BE%20%D0%BA%D0%BE%D1%81%D0%BC%D0%BE%D1%81&path=main&reqid=1513175428905465-1641906819282495832002859-man1-4483-V.
Please reference the attached file that I've recorded. It keeps showing the
while macroblock and the interesting thing is it won't happen while I play the
same video clips on youtube. And it won't be a problem playing with Firefox.
But why I'm so sure that it's about i915 driver is due to everything good after
I disable i915 while booting. It's good after I switch to NVIDIA drm on X542UQ
and disable i915 on X507MA.

I also tried the kernel 4.13+ and 4.15+ but nothing changed. Then tried to
build my own kernel from the current head of drm-intel-next-queued branch on
git://anongit.freedesktop.org/drm-intel, the problem still remains. And maybe
one thing worth mention even I don't know it causes confusion or does help.
When I compiled the kernel with CONFIG_DRM_I915_ALPHA_SUPPORT=y, things would
get worse. The white macroblock shows more frequently.

Any suggestions?

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