[Bug 37785] New: [r600g Evergreen] GPU lockup on Blender 2.57 when moving objects

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=37785

           Summary: [r600g Evergreen] GPU lockup on Blender 2.57 when
                    moving objects
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: ahlaht at gmail.com


Created an attachment (id=47353)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=47353)
dmesg with errors

GPU lockup (waiting for 0x00004E51 last fence id 0x00004E50)

Using the latest git:
Linux 2.6.39, drm 61be940, mesa 29ceeeb, xorg 1.10.2, ati 6.14.2

Hardware:
HP laptop, Core i5-450M + Radeon HD 5650 REDWOOD (68C1)

Steps to reproduce:

1. Start Blender 2.57 normally:
$ blender-2.5 --factory-startup

2. On the default scene with the cube press 'g' to move the cube

3. Use mouse to continuously move the cube on screen on random directions

4. After about 5 seconds Blender freezes but mouse cursor keeps moving

5. A GPU lockup occurs and the provided errors appear on dmesg

The bug is very easy to reproduce on my system. I can keep using the system
normally after the bug, but sometimes I have to reset the video mode by
switching to text console and then back to Xorg.

Also there is an alternative way to trigger the bug: Instead of moving the
cube keep resizing any of the side panels continuously.

The problem disappears if I gpu-switcheroo to i965 so I assume this is
something r600g related. Also I was not able to reproduce it on r600c.

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