[Bug 28405] New: X server locks up with Radeon HD4200 IGP (RS880)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28405

           Summary: X server locks up with Radeon HD4200 IGP (RS880)
           Product: xorg
           Version: 7.5
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: himek_imp at o2.pl
         QAContact: xorg-team at lists.x.org


When i start some OpenGL apps the screen starts to turn on and off in a loop
and after some time the PC either reboots or locks completely.

I'm running Ubuntu Lucid with xorg-edgers PPA, but same happened on stock Lucid
installation. KMS and KWin effects enabled (default).
The radeon driver verion is
1:6.13.99+git20100604.f64bf0de-0ubuntu0sarvatt~lucid.

It also happens when running some games (Yo frankie!), but not 100%
reproducible.
Seems more likely when on full screen. I can play nexuiz just fine in windowed
mode (at 4-10 FPS but runs).
Once it locked on glxgears when I maximized the window.

A reliable way (100%) to reproduce is:
 *install chromium (i have 6.0.426.0 daily build)
 *run chromium-browser --enable-webgl
 *go to http://www.iquilezles.org/apps/shadertoy/ and choose the Radial Blur
preset from the combo on top right
In this case it locked up but didn't reboot.

I'm attaching some log from the WebGL case above, hope I took the right ones.

Cheers.

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