[Bug 62681] New: [sna 865g] Adobe flash corruption

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62681

          Priority: medium
            Bug ID: 62681
          Assignee: chris at chris-wilson.co.uk
           Summary: [sna 865g] Adobe flash corruption
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: timo at kamph.org
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Created attachment 76953
  --> https://bugs.freedesktop.org/attachment.cgi?id=76953&action=edit
backtrace of the failed assertion

The output of Adobe's flash player is heavily corrupted with versions 2.21.4
and 2.21.5 of xf86-video-intel. Flash videos are distorted and shown with wrong
colors. Version 2.21.3 is ok.

Bisecting the changes between 2.21.3 and 2.21.4 revealed commit
4174c7bb14ea3428d86dc327950e76d0589e0cc4 (sna: Use depth-15 rather than
depth-16 for reduced bw devices) to be the cause of the corruption. Reverting
that change on top of the current HEAD
(f6582387e7d601272a92c3aaeb656de5ce1ffe75) resolves the issue.

Furthermore, trying to grab a screenshot with a corrupted youtube-video
triggered an assertion in kgem_create_buffer_2d (width > 0 && height > 0; see
attached backtrace).

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