Bug 22786

Summary: NV30: X hangs with KMS enabled in certain cases
Product: xorg Reporter: Patrice Mandin <patmandin>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.4 (2008.09)   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description Patrice Mandin 2009-07-15 12:24:42 UTC 
- With Option "EXAPixmaps" "on"

When enabled, X simply hangs at startup, just get a black screen with visible mouse cursor.

- With Mesa/gallium nv30 backend (I know, unsupported, just in case it is the same issue):

progs/trivial/tri hangs X somewhere in libdrm. gdb show me it is when nouveau_pushbuf_flush() is called. The specific instruction seems to be drmCommandWrite(..., DRM_NOUVEAU_GEM_PUSHBUF, ...). Not the first time it is called, but the 3rd or 4th.

In both cases, disabling agp (nouveau.noagp=1) makes no change, X still hangs.
Comment 1 Patrice Mandin 2009-07-30 10:46:32 UTC 
- No more X hang when running some Mesa application, with latest git (20090730) for everything. Will try a bit later EXAPixmaps option.
Comment 2 Patrice Mandin 2009-08-16 05:11:38 UTC 
Enabling Option "EXAPixmaps" "on" in xorg.conf does not hang X anymore. So I suppose it is fixed (or else it is disabled for hardware that may cause problems?).

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