[Bug 79517] New: Corruption in Firefox 30 or later

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79517

          Priority: medium
            Bug ID: 79517
          Assignee: chris at chris-wilson.co.uk
           Summary: Corruption in Firefox 30 or later
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jan.steffens at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

Arch Linux x86_64
Thinkpad X220t (SNB)
xf86-video-intel ffbe0aa (TearFree enabled)
xorg-server 1.15.1
linux 3.14.5

Reproduced with Firefox 30.0b9 or 31.0a2. Does not happen in 29.0.

1. Navigate to a large image, like
http://upload.wikimedia.org/wikipedia/commons/4/4b/Chicago_-_skyline.JPG

2. Wait for the image to load completely
3. Click the image to zoom 1:1
4. Hit Ctrl++ (Control Plus) to zoom in once
5. Hit Ctrl+0 to reset zoom
6. Scroll vertically, quickly
7. Observe the image corrupting

Corruption does not happen if gfx.xrender.enabled is disabled.

Might be related to bug #79516.

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