Bug 14961

Summary: NV30: random dma queue hang
Product: xorg Reporter: Patrice Mandin <patmandin>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED NOTABUG QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.3 (2007.09)   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description Patrice Mandin 2008-03-11 14:11:45 UTC 
Sometimes I got this in the kernel logs:

[drm] PGRAPH_ERROR - nSource: LIMIT_ZETA, nStatus: PROTECTION_FAULT
[drm] PGRAPH_ERROR - Ch 2/2 Class 0x009f Mthd 0x0308 Data 0x00000007:0x011c0130

I checked every calls in DDX driver that set data to method 0x308 for class 0x9f (NV12_IMAGE_BLIT), and did not find anything that may cause the error. It happens either at start time (heavy bus usage, to load everything from disk), when I move a big window (opaque mode), or sometimes more randomly.

I notice some big lags just before it triggers, and X crashes with DMA queue hang error. It's like the fifo data has been overwritten. Enabling NOUVEAU_DMA_DEBUG in DDX did not show anything wrong.

Card is 0x10de:0x0309, NV30GL
Comment 1 Stuart Bennett 2009-01-13 15:20:55 UTC 
Still seeing this?
Comment 2 Patrice Mandin 2009-01-17 02:45:52 UTC 
It does not happen anymore since I bought a new PC to use the NV30.

Maybe it was simply the old motherboard that could not handle it, but I suppose the Nvidia blob driver has some checks to avoid this.

I think you can close this bug now, but it may still happen on old boxes.
Comment 3 Pekka Paalanen 2009-11-19 13:42:46 UTC 
You could have closed this as a hardware failure yourself ;-)

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