[Nouveau] [Bug 64774] New: nouveau GF108 kernel crash in optimus mode when enabling external display output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=64774

          Priority: medium
            Bug ID: 64774
          Assignee: nouveau at lists.freedesktop.org
           Summary: nouveau GF108 kernel crash in optimus mode when
                    enabling external display output
        QA Contact: xorg-team at lists.x.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: pasik at iki.fi
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 79549
  --> https://bugs.freedesktop.org/attachment.cgi?id=79549&action=edit
dmesg Linux 3.8.11 nouveau optimus before the kernel crash

I'm using Lenovo T430 laptop with intel+nvidia hybrid graphics, optimus is
enabled in BIOS:

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [Quadro NVS 5400M]
(rev a1)

$ uname -a
Linux localhost.localdomain 3.8.11-200.fc18.x86_64 #1 SMP Wed May 1 19:44:27
UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

I boot up the system with only laptop internal LVDS active on intel gpu, and
when in X session, I enable the second display on nouveau gpu connected to the
dock DP2/DVI connector. 
At this point the kernel crashes immediately.

Screenshots of the kernel crash/stacktrace here:
http://pasik.reaktio.net/nouveau/debug/nouveau-kernel-crash01.jpg
http://pasik.reaktio.net/nouveau/debug/nouveau-kernel-crash02.jpg

hand-written bits from the kernel crash:

Pid: 1208, comm: Xorg Not tainted 3.8.11-200.fc18.x86_64 #1 LENOVO
2349H2G/2349H2G
RIP: 0010:[<ffffffffa01abb7e>] [<ffffffffa01abb7e>] nvc0_vm_map_sg+0x8e/0x110
[nouveau]
RSP: 0018:ffff8803298357c8 EFLAGS: 00010206
..
Process Xorg (pid: 1208,..)
..
Call Trace:
.. nouveau_vm_map_sg+0xc2/0x130 [nouveau]
.. nouveau_vma_getmap.isra.11+0x68/0xa0 [nouveau]
.. nouveau_bo_move_m2mf.isra.12+0x85/0x140 [nouveau]
.. ? nouveau_vm_map_at+0x153/0x1c0 [nouveau]
.. nouveau_bo_move+0xa5/0x400 [nouveau]
.. ttm_bo_handle_move_mem+0x245/0x610 [ttm]

More info from the screenshots above (also attached)..

Kernel dmesg from before the crash attached.
I also tried with Linux kernel 3.9.2 and there the system crashes hard aswell.

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