[Nouveau] [Bug 67315] System lockup with X consuming all CPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67315

--- Comment #6 from Emil Velikov <emil.l.velikov at gmail.com> ---
Now this is interesting

[19.600630]
Initially the kernel "drm" seems to pass NULL pointer to the card, while doing
nv50_fbcon_imageblit()

ch 1 [0x0007cb0000 DRM] subc 3 class 0x502d mthd 0x0860 data 0x00000000

The way I see it, after this point we're on the mercy of the hardware

[19.627513]
X/the ddx
MP is still funny and fails to execute/set EDGEFLAG_ENABLE to 1 (which for the
sake of me I cannot find in the ddx code?) 

[55.041877]
At this point the GPU is completely stuffed fails to execute/set
NV50_2D_BLIT_SRC_Y_INT, (coming from X).

After that hell breaks loose :P


Rick a few interesting notes
In the last attachment Xorg.log claims that it's starts at ~81.456, whereas
dmesg states that X was running ~19.627541.
* Are those logs matching (ie. captured from the same boot/system startup)
I'm assuming that you've started your screensaver ~55.041877. Is that correct ?
* Do you recall when did your nouveau started started reporting errors (nouveau
E) ?

Note: the following messages are harmless
nouveau E[    PBUS][0000:02:00.0] MMIO read of * FAULT at 0x1002**

Cheers
Emil

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