[Bug 80235] New: Artifacts in kernel 3.16-rc1 and HD 7750

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80235

          Priority: medium
            Bug ID: 80235
          Assignee: dri-devel at lists.freedesktop.org
           Summary: Artifacts in kernel 3.16-rc1 and HD 7750
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: rgfernandes at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 101360
  --> https://bugs.freedesktop.org/attachment.cgi?id=101360&action=edit
Image showing the artifact

I have updated the kernel to 3.16-rc1 and got some screen artifacts.
I have bisected the problem and found that the commit
1aab5514ca9604e0263f658a067da0189c86a35b (drm/radeon: rework page flip handling
v3) is causing these artifacts.
I am attaching some images to show these artifacts.
There is also a artifact in steam logo inside Portal 2 (the background texture
seems to disapear) that does not happen in commit just before
(1a0e79184132c5dc0e03a4047eacecc52c24deae).
I got 2 freezes too. The computer does not respond anymore, I can't switch to
console and after some seconds the computer reboots.
But I not sure if this problem is in this commit
(1aab5514ca9604e0263f658a067da0189c86a35b).

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