[xorg-bugzilla-noise] [Bug 473] New: endless loop in MGAWaitForIdleDMA

[bugzilla-daemon at pdx.freedesktop.org]

http://pdx.freedesktop.org/cgi-bin/bugzilla/show_bug.cgi?id=473

           Summary: endless loop in MGAWaitForIdleDMA
           Product: xorg
           Version: 6.7.0
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Driver/mga
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: kenan.esau at conan.de


After starting a program which uses DRI (eg glxgears) the screen freezes. I can 
still move the mouse-cursor but nothing else happens. I can still log in to the 
machine using ssh. There is no chance to revive the graphics card but rebooting 
the whole system. 
 
The Xorg.0.log is full of messages like this: 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
(EE) MGA(0): [dri] Idle timed out, resetting engine... 
 
 
This Bug seems to be there quite a while -- I also saw it on Xfree 4.3.0 
(Debian/unstable). 
 
I am currently using a 2.6.5 Linux-Kernel (vanilla) and I've used the 
DRM-kernel modules which are provided with the kernel and the ones provided 
with the X sources -- no effect.



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