[Nouveau] [Bug 26980] GT230M or GT218 with nouveau: X server hangs spontaneously

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=26980

--- Comment #29 from Marcin Kościelnicki <koriakin at 0x04.net> 2010-08-04 14:04:36 PDT ---
Can we please stop with the "me too"s and useless backtraces already? We
already know the bug affects anyone with NVA3+ cards and the backtraces only
show the fallout of the fallout of the fallout of the original problem...

Also: if you get a DMA_PUSHER, that's another bug. This bug happens with total
silence from the kernel - the card just hangs without telling us why.

Now, a status update. So far, I REd the instruction set and disaassembled a
good chunk of that microcode. Sure enough, it pokes PGRAPH and watches for
stuff on it. But the code doesn't yet fully make sense to me, and I'm
temporarily away from my NVA5 card, so... could someone dump some registers for
me?

I need a dump of the registers both before and after the hang. The interesting
stuff is in 10axxx range, and ideally I'd want output of "./peek 10a000 1000".
However, if the card doesn't like it and hangs or something upon that command,
dump registers individually instead by doing "./peek X" for X being 10a008,
10a6fc, 10a4fc, 10a4f4, 10a714, 10a700, 10a704, 10a4dc, 10a690, 10a688.

Repeating that 2 or 3 times may be useful, esp. across different chipsets. But
not TOO much, please.

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