Created attachment 9120 [details]
Xorg log with NV_DMA_DEBUG enabled

the Xorg log

Created attachment 9121 [details]
the kernel log for the crash

the kernel log

Created attachment 9122 [details]
the lspci output

the lspci output

it doesn't work even if the binary driver wasn't loaded before
it works with this patch:

--- sane-nouveau/xf86-video-nouveau/src/nv_driver.c     2007-03-05
14:26:05.000000000 +0100
+++ xf86-video-nouveau/src/nv_driver.c  2007-03-06 15:36:56.000000000 +0100
@@ -1702,8 +1702,7 @@
                else
                        gart_scratch_size = pNv->AGPSize;

-               pNv->AGPScratch = NVAllocateMemory(pNv, NOUVEAU_MEM_AGP,
-                                                       gart_scratch_size);
+               pNv->AGPScratch = NULL;
                if (!pNv->AGPScratch)
                        xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
                                        "Unable to allocate AGP memory\n");

I think I've seen this particular bug before, does this patch also fix the problem?

diff --git a/src/nv_exa.c b/src/nv_exa.c
index ed6901b..9eaaa20 100644
--- a/src/nv_exa.c
+++ b/src/nv_exa.c
@@ -331,6 +331,9 @@ static Bool NVUploadToScreen(PixmapPtr pDst,
        h = pDst->drawable.height;
 #endif
 
+       if (src_pitch == 0)
+               return FALSE;
+
        pitch_out = exaGetPixmapPitch(pDst);
        offset_out = NVAccelGetPixmapOffset(pNv, pDst);
        offset_out += y*pitch_out;

this patch fixes the SIGFPE but now i sometimes get an SIGSEV (Xorg.log attached) or X hangs (maybe related to #10199)

Created attachment 9140 [details]
Xorg log for SIGSEV crash

the SIGSEV seems to be related to the Xserver not to nouveau.
I reinstalled the Xorg Xserver shipped with Ubuntu Feisty fawn instead of using a self compiled git one. After i applied the patch suggested in comment #5 nouevau is working now. But it is very slow

Problem disappeared after an Xorg update.
Thatswhy I assume it was related to Xorg not to nouveau.
I mark it as resolved with resolution NOTOURBUG

I am hitting the same bug on debian sid (last tested Xorg = 1:7.2-3).
This happen since an update that happen 1 or 2 month ago.

Like comment #2, there nothing special in kernel log.
I have got trace like comment #1, but there not always a X stack trace.

If I try to attach gdb to Xorg, when X crash, I see garbage in the stack trace.

I could trigger the bug under gdm, if I open a menu (for choosing another desktop, ...) an put the mouse on it.


Comment #4 seems the avoid the bug, but comment #5 doesn't.

reasing

Should be fixed in latest git.