[Bug 76957] New: Pixel artifacts and corruption plus system freeze and instabilities with the free radeon driver (AMD HD 6570)

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=76957

          Priority: medium
            Bug ID: 76957
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Pixel artifacts and corruption plus system freeze and
                    instabilities with the free radeon driver (AMD HD
                    6570)
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: benjamin.menant+debian@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 96797
  --> https://bugs.freedesktop.org/attachment.cgi?id=96797&action=edit
Screenshot

Hello,

Each time I tried to use the free radeon drivers with my desktop computer, I
got those corrupted pixels when X starts. The issue effects increase as the
session time grows: more and more artifacts, more and more character
alterations (for instance, Thunderbird is displaying blocks instead of
characters), more and more instabilities (programs ends up by a segmentation
fault, and could eventually lead to a system freeze).

Otherwise, Gnome Shell starts without error. `glxgears` works and returns good
FPS. And the virtual consoles remain safe & clean; switching between them and X
has no effect.

The system was stable, without screen corruption when I used the AMD’s FGLRX
drivers.

How could I fix this issue? Any idea?
This ticket seems quite similar, should I try the proposed patch?
<https://bugs.freedesktop.org/show_bug.cgi?id=66932>

Chipset: AMD Radeon HD 6570 (Turks family) with 512MB dedicated RAM (AFAIR).
CPU: Intel DualCore E6300 with 4GB RAM.
Kernel: Linux 3.13-1-amd64.
And I use the defaut Xorg configuration (i.e. no configuration files).

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