[Bug 94475] New: Texture flickering when render with Chrome

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94475

            Bug ID: 94475
           Summary: Texture flickering when render with Chrome
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: renegart at gmx.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 122198
  --> https://bugs.freedesktop.org/attachment.cgi?id=122198&action=edit
video showing flickering

We have written a pepper-plugin for chrome using the (internal) API to render
with EGL our video content.

On a Intel-GPU we see flickering and corrupted textures.
This effect is seen with the "current" Intel driver on Debian Stretch but not
on Ubuntu 15.10.

Starting with this information I could identify via 'git bisect' the first
"bad" commit which introduces the issue:

commit b86974ffd435b2339cd873131e0f90aedc9c4a42
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Aug 18 11:36:46 2015 +0100

    sna/dri2: Do full exchanges of back/pending around deferred swaps

    References: https://bugs.freedesktop.org/show_bug.cgi?id=91658
    References: https://bugs.freedesktop.org/show_bug.cgi?id=70461
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Since the environment is a little bit complex to provide a reproducer easily,
I've added some videos showing the issue

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