[Nouveau] [Bug 43323] New: GPU lockup - X does not start on MacMini4, 1 on 3.2.0-rc3-gf2d092a

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43323

             Bug #: 43323
           Summary: GPU lockup - X does not start on MacMini4,1 on
                    3.2.0-rc3-gf2d092a
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: nico-freedesktop.org at schottelius.org
         QAContact: xorg-team at lists.x.org


Hello!

After seeing the errors described in 

http://home.schottelius.org/~nico/unix/progs/xf86-video-nouveau/dmesg

(I was also unable to start xorg there)

I upgrade to the kernel sources found in
git://anongit.freedesktop.org/git/nouveau/linux-2.6.

I've used the .config from Archlinux.

Now I get


[   41.306679] [drm] nouveau 0000:05:00.0: PFIFO still angry after 101 spins,
halt
[   47.165540] mtrr: no MTRR for d1000000,e00000 found
[   67.250247] [drm] nouveau 0000:05:00.0: GPU lockup - switching to software
fbcon
[   70.263372] [drm] nouveau 0000:05:00.0: Failed to idle channel 2.

and in Xorg.0.log I get


[    67.070] (EE) NOUVEAU(0): failed to set mode: Device or resource busy


Full logs are at

http://home.schottelius.org/~nico/unix/progs/xf86-video-nouveau/Xorg.0.log-3.2.0-rc3-ARCH-gf2d092a

and 

http://home.schottelius.org/~nico/unix/progs/xf86-video-nouveau/get-sysinfo.sh.kalamaris.log-3.2.0-rc3-ARCH-gf2d092a

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