[Nouveau] [Bug 23593] nouveau hangs after a few minutes

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=23593





--- Comment #14 from Francisco Jerez <currojerez at riseup.net>  2009-09-04 10:26:37 PST ---
(In reply to comment #12)
> lspci says:
> 01:00.0 VGA compatible controller: nVidia Corporation NV5 [RIVA TNT2/TNT2 Pro]
> (rev 15)
> but the nouveay and/or drm code speaks of nv04 on probing...? I'll attach an
> Xorg log too.
> 
> 

I've been trying to reproduce this for a while on another nv05 without success,
I'm using master though. You said you were on master-compat but later that you
were using a 2.6.31 release candidate so, which branch are you using exactly?

There might be an specific acceleration request deterministically triggering
the lockup. Have you tried e.g. "$ x11perf -all"? It would be interesting to
know if any of the tests it does makes your system hang.

> [...]
> As a newbie to nouveau, I made one interesting observation: The X screen when
> starting X (even after warm-reboot) is initially painted with the contents of
> the last X screen. If I bog down the cpu with a cpu bound task (such as drm
> logging to syslog) I can watch the old contents for ca 5 seconds before it's
> cleared and the WM starts. That smells like a BIG security issue for public
> terminals. Shouldn't the GPU/fb memory be clearedbefore handed to the process
> (as RAM is when provided to a process?)
> 

That could be easily done. In fact it's already done for the non-KMS case. I
guess patches are welcome.


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