[Nouveau] [Bug 49815] nouveau segfaults in p_atomic_dec_zero

Tue May 15 20:54:15 PDT 2012

https://bugs.freedesktop.org/show_bug.cgi?id=49815

--- Comment #2 from andrew.green.df at gmail.com 2012-05-15 20:54:15 PDT ---
Looks like I've been bitten by the same bug, or something similar. 
Everything was working fine until I pulled in the latest mesa from git 
and recompiled. Then gnome started going only into fallback mode. In 
dmesg I was getting:
gnome-session-c[3618]: segfault at 100010001 ip 00007f0419ae0570 sp 
00007fffd3204870 error 6 in nouveau_dri.so[7f0419a64000+495000]

When in fallback mode, if I ran glxinfo it would also segfault:
glxinfo[3729]: segfault at 100010001 ip 00007ffe31f49570 sp 
00007fff22a85df0 error 6 in nouveau_dri.so[7ffe31ecd000+495000]

Going back to commit b328949a37fee7b0f68ed3e068ffc4426c083042 fixed it.

I'm afraid I have no backtrace but if someone can point me to some quick 
instructions I should be able to try to get one in a few days.

Here is what lspci says my card is:
01:00.0 VGA compatible controller: NVIDIA Corporation G86M [Quadro NVS 
135M] (rev a1)

I'm using a very mixed Debian testing/unstable/experimental, kernel 
3.2.0-2, amd64, on a Dell Latitude D630 laptop.

(BTW, nouveau works moderately well on my box. I can run Gnome 3 but the 
zoom animations look like crap, maybe because the card stays in 
low-power mode. (I used to run the nvidia blob with Compiz, and I had to 
deactivate power saving to get good animations then.) After about 20-30 
hours of use I usually get some kind of memory corruption, or X locks 
up, and I have to reboot. However, the 2d acceleration rocks, much 
faster than the blob! Makes it worth it.)

Anyway, thanks to everyone for your great work! Greetings,
Andrew

El 11/05/12 08:10, bugzilla-daemon at freedesktop.org escribió:
> https://bugs.freedesktop.org/show_bug.cgi?id=49815
>
> --- Comment #1 from Alen Skondro<askondro at gmail.com>  2012-05-11 13:10:40 UTC ---
> Forgot to add the latest commit I'm using...
>
> 23c0d469e55b3cb79ad4b2fd0d961562a26234fd
>

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