[Nouveau] [Bug 56692] New: Xorg freezes with vblank enabled on nouveau nvc8

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56692

          Priority: medium
            Bug ID: 56692
          Assignee: nouveau at lists.freedesktop.org
           Summary: Xorg freezes with vblank enabled on nouveau nvc8
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kel.p.doran at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Created attachment 69458
  --> https://bugs.freedesktop.org/attachment.cgi?id=69458&action=edit
Kernel log

I am using the latest nouveau git kernel sources on top of 3.7.0-rc3,
xf86-video-nouveau 1.0.3, mesa 9.0, and xorg-server 1.13.0 and a gtx580.  The
main issue is that X freezes when the GLXVBlank option is enabled.

The screen freezes up seemingly when any OpenGL stuff gets rendered.  Even
running glxinfo can freeze it up, but just starting a basic twm session or i3wm
will not freeze it.  Attempting to play movies via xvmc also freezes it, so I
guess it it not purely OpenGL related.  It runs fine when vblank is disabled
doing the previously mentioned things.  I tried using proprietary firmware as
suggested in IRC but that did not help.

As for the freeze: the mouse starts slowing down and then freezes, and then it
can be moved again but X is completely frozen.  I can switch to a different tty
without using SysRq+R.  The tty only appears in a small box in the upper left
hand corner and the rest of the screen is what it was when X froze.  The tty is
all corrupted too... but you can see text changes when you type, and I can copy
logs and reboot so the system is still mostly working, the graphics are just
completely messed up.

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