Nouveau - Oct 2010 - [Bug 30865] New: Segfault after upgrading xorg-edgers Nouveau a couple of commits

https://bugs.freedesktop.org/show_bug.cgi?id=30865

           Summary: Segfault after upgrading xorg-edgers Nouveau a couple
                    of commits
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: nigel at nigel.suspend2.net
         QAContact: xorg-team at lists.x.org


After upgrading xorg-edgers to the latest release, I'm unable to use...

Old versions:
libdrm2 2.4.22+git20100929.624e58e3-0ubuntu0sarvatt~lucid
libdrm-nouveau1 2.4.22+git20100929.624e58e3-0ubuntu0sarvatt~lucid
libkms1 2.4.22+git20100929.624e58e3-0ubuntu0sarvatt~lucid
xserver-xorg-video-nouveau 1:0.0.16+git20101003.9a5142fa-0ubuntu0sarvatt~lucid

New versions:
libdrm2 2.4.22+git20101012.09b10626-0ubuntu0sarvatt~lucid
libdrm-nouveau1 2.4.22+git20101012.09b10626-0ubuntu0sarvatt~lucid
libkms1 2.4.22+git20101012.09b10626-0ubuntu0sarvatt~lucid
xserver-xorg-video-nouveau 1:0.0.16+git20101003.9a5142fa-0ubuntu0sarvatt~lucid

Xorg's error log contains

[    11.642] (II) Initializing built-in extension COMPOSITE
[    11.642] (II) Initializing built-in extension DAMAGE
[    11.733] 
Backtrace:
[    11.733] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80ad18b]
[    11.733] 1: /usr/bin/X (0x8048000+0x60685) [0x80a8685]
[    11.733] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb785640c]
[    11.733] 3: /usr/lib/dri/nouveau_dri.so (0xb618b000+0x15e291) [0xb62e9291]
[    11.734] Segmentation fault at address 0xa0
[    11.734] 
Fatal server error:
[    11.734] Caught signal 11 (Segmentation fault). Server aborting

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https://bugs.freedesktop.org/show_bug.cgi?id=30865

--- Comment #1 from Xavier <shiningxc at gmail.com> 2010-10-14 05:01:21
PDT ---
Invalid.

You need to upgrade xserver-xorg-video-nouveau to latest git, up to this commit
: 4f42708c26fa57bac7854701a6e757958c8d0654

See steps 8 and 9 here http://nouveau.freedesktop.org/wiki/InstallNouveau if
you cannot find up-to-date packages.

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--- Comment #2 from Xavier <shiningxc at gmail.com> 2010-10-14 05:08:39
PDT ---
Btw the segfault is in nouveau_dri.so but you didn't show mesa version..
Just like the ddx, you need latest git for mesa too if you want it to work with
the new libdrm API.

Also 3d is completely unsupported, developers don't look at bugs reports
related to 3d. It's also recommended to not install 3d system-wide as you
did.
This is all on the wiki, if only people would bother to read it :
http://nouveau.freedesktop.org/wiki/GalliumHowto

So if 3d causes a segfault and you cannot fix it, you just remove the broken 3d
driver, and problem is solved.

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Nigel Cunningham <nigel at tuxonice.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #3 from Nigel Cunningham <nigel at tuxonice.net> 2010-10-14
14:04:04 PDT ---
Thanks for the reply.

Sorry for missing mesa out - I didn't notice it when I looked at what had
been
upgraded in the dpkg log.

I do realise 3d is unsupported. This bug report wasn't intended as a
complaint,
but more as a FYI. I know, too, that you can't fix bugs if you don't
know they
exist, and I had searched but not seen any indication that anyone knew this one
exists. The Nouveau page doesn't say how do you want bugs reported. Do you
just
want an email sent to the list?

Regards,

Nigel

(Marking invalid, since you said it is)

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--- Comment #4 from Sven Joachim <svenjoac at gmx.de> 2010-10-14 14:21:03
PDT ---
The proper solution would have been to bump libdrm-nouveau's soname, since
not
only the API but also the ABI has changed.

But I guess nouveau is still in "not released yet, only the latest git of
everything is supported at all" state, and distributions which ship it
anyway
have to find their way around that (e.g. by changing package names when the ABI
breaks).

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