[Nouveau] [Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #18 from Ilia Mirkin <imirkin at alum.mit.edu> ---
An alternative to bisecting: you know where the crash is, it's at

[   360.877] (EE) 3: /usr/local/lib/xorg/modules/drivers/nouveau_drv.so
(0x7f24ae751000+0x255c0) [0x7f24ae7765c0]
[   360.877] (EE) 4: /usr/bin/X (xf86CrtcSetModeTransform+0x12a) [0x4aad4a]

So load up nouveau_drv.so in gdb (gdb
/usr/local/lib/xorg/modules/drivers/nouveau_drv.so)

And inside gdb, run

disassemble 0x255c0

That should tell you what function it's dying in, and the exact instructions
it's dying on. This is what I did for bug 63263 (see my initial comment there),
and that was able to pinpoint the crash exactly. (Of course figuring out the
circumstances that lead to that condition can be trickier to work out.)

You can also compile the whole thing with -g, e.g. ./configure CFLAGS=-g or
something like that. And make sure that the final thing isn't stripped. That
might make gdb more cooperative if you're having trouble.

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