[Nouveau] [Bug 27574] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27574

--- Comment #9 from Alexander <alex.vizor at gmail.com> 2010-05-02 14:50:54 PDT ---
I still can't reproduce exactly this bug with proposed debugging but I have
following error or something like this after which system or just X completely
freeze and doesn't respond


May  3 00:37:40 loki kernel: [47292.941614] video LNXVIDEO:01: Restoring
backlight state
May  3 00:37:40 loki kernel: [47293.171676] [TTM] mem->mem_type 2
May  3 00:37:40 loki kernel: [47293.185220] [drm] nouveau 0000:01:00.0:
PFIFO_DMA_PUSHER - Ch 2
May  3 00:37:40 loki kernel: [47293.186640] [drm] nouveau 0000:01:00.0:
PFIFO_CACHE_ERROR - Ch 2/0 Mthd 0x0000 Data 0x0f000000
May  3 00:37:40 loki kernel: [47293.186651] [drm] nouveau 0000:01:00.0:
PFIFO_DMA_PUSHER - Ch 2

it happens on resume from ram also

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