[Bug 19140] New: Xorg hang [drm:radeon_cp_idle] *ERROR* radeon_cp_idle called without lock held [1002:5961]

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=19140

           Summary: Xorg hang [drm:radeon_cp_idle] *ERROR* radeon_cp_idle
                    called without lock held [1002:5961]
           Product: xorg
           Version: 7.3
          Platform: x86 (IA32)
               URL: https://bugs.edge.launchpad.net/ubuntu/+bug/305458
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: bryce at canonical.com
         QAContact: xorg-team at lists.x.org


Forwarding this bug from a Ubuntu reporter:
https://bugs.edge.launchpad.net/ubuntu/+bug/305458

[Problem]
X gets stuck in a loop, reporting the following error to dmesg:

 [drm:radeon_cp_idle] *ERROR* radeon_cp_idle called without lock held, held 0
owner ed9589c0 ee2e0880

[lspci]
01:05.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200]
0300: 1002:5961 (rev 01)
        Subsystem: C.P. Technology Co. Ltd Device 2063
        Subsystem: 148c:2063

[Original Report]
When attempting to run a 3d game such as Enemy Territory or a game via wine X
crashes and locks up. I am still able to ssh into the system but unable to kill
X in any way. Exactly the same thing happens using the kernel from Hardy so I'm
inclined to believe this not a kernel issue.

dmesg is entirely filled with:
Dec 5 11:23:39 smithers kernel: [ 126.311404] [drm:radeon_cp_idle] *ERROR*
radeon_cp_idle called without lock held, held 0 owner ed9589c0 ee2e0880
Dec 5 11:23:39 smithers kernel: [ 126.313311] [drm:radeon_cp_reset] *ERROR*
radeon_cp_reset called without lock held, held 0 owner ed9589c0 ee2e0880
Dec 5 11:23:39 smithers kernel: [ 126.316425] [drm:radeon_cp_start] *ERROR*
radeon_cp_start called without lock held, held 0 owner ed9589c0 ee2e0880

01:05.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200]
(rev 01)
        Subsystem: C.P. Technology Co. Ltd Device 2063

$ lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10

$ apt-cache policy linux-image-generic
linux-image-generic:
  Installed: 2.6.27.9.13
  Candidate: 2.6.27.9.13
  Version table:
 *** 2.6.27.9.13 0
        500 http://ubuntu.virginmedia.com intrepid-updates/main Packages
        500 http://ubuntu.virginmedia.com intrepid-security/main Packages
        100 /var/lib/dpkg/status
     2.6.27.7.11 0
        500 http://ubuntu.virginmedia.com intrepid/main Packages


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