[Nouveau] [Bug 52509] New: System hangs completely after loading nouveau kernel module

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=52509

             Bug #: 52509
           Summary: System hangs completely after loading nouveau kernel
                    module
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: eugene at shatsky.net
         QAContact: xorg-team at lists.x.org


Created attachment 64686
  --> https://bugs.freedesktop.org/attachment.cgi?id=64686
Kernel messages after loading noveau module

GT 240 card (10de:0ca3), works nice with proprietary driver
Gentoo kernels 3.2.12 and 3.3.8 Fedora 16, 17 with 3.4.4 - same behavior, even
same last messages.
Almost immediately after loading nouveau kernel module the system hangs
completely, even Alt+SysRq keys don't work. Few times it looked like panic -
keyboard LEDs started blinking, but usually it just hangs.
I used systemd.unit=emergency.target to isolate the situation - boot to minimal
system and run modprobe nouveau manually, netconsole to extract messages -
strangely, it got nothing more than I can see on the screen. I'm afraid nothing
useful is there, last one being "[drm] No driver support for vblank timestamp
query.", but I attached log of all messages which appear after executing
modprobe. Maybe, I can get more debug output somehow?

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