[Bug 23672] New: Nouveau KMS fails with error: Failed to fence channel 0

[Bug 23672] New: Nouveau KMS fails with error: Failed to fence channel 0

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=23672

           Summary: Nouveau KMS fails with error: Failed to fence channel 0
           Product: xorg
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: azverkan-/E1597aS9LQAvxtiuMwx3w@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


Created an attachment (id=29162)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=29162)
Kernel log of nouveau KMS failure with drm debug enabled

While loading the nouveau module with KMS enabled, I get an ton of unhandled
interrupt messages followed by the error "Failed to fence channel 0" at which
point the driver fails to setup the device.  This is with nouveau git at
c9071b39d2612ef3d5a634ce54cddb122def2fdf which incorporates the INIT_LIST_HEAD
fix which prevents the kernel from oopsing after the initialization failure.

Even with the oops fix from git, attempting to start xorg and
xf86-video-nouveau on the primary card after the secondary fails results in a
partial system lock.  The kernel still responds to Alt-SysRQ requests, but of
the rest of the operating system is unresponsive to network or keybaord events
at this point.



There are two cards in the system, the 9800 is the primary and the secondary
card is the 7800.  Modesetting appears to work for the 9800 device and then
fail on the 7800 device from looking in the log.

03:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce 9800 GTX]
(rev a2)
06:00.0 VGA compatible controller: nVidia Corporation G70 [GeForce 7800 GTX]
(rev a1)

Loading the nouveau module without modesetting enabled succeeds and
successfully sets up the 9800 as the primary card and is usable by
xf86-video-nouveau and xorg from git head.  I haven't yet attempted to see if
the secondary 7800 is also usable without modesetting enabled.


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[Bug 23672] Nouveau KMS fails with error: Failed to fence channel 0

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=23672


Brandon Ehle <azverkan-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #29162|application/octet-stream    |text/plain
          mime type|                            |




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[Bug 23672] Nouveau KMS fails with error: Failed to fence channel 0

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=23672





--- Comment #1 from Maarten Maathuis <madman2003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2009-09-03 05:09:39 PST ---
Problem 1: we don't recognize if the card is posted or not for your 7800, so it
doesn't even attempt to post it.

Not quite sure how to solve this.


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[Bug 23672] Nouveau KMS fails with error: Failed to fence channel 0

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=23672





--- Comment #2 from Ben Skeggs <skeggsb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2009-09-03 05:20:42 PST ---
I looked at kmmio traces, it looks like NVIDIA detect it the same way as on G8x
for NV4x.  I'll check the earlier cards too and detect this correctly for
earlier chips, but this detection will cause the drm to fail to initialise for
those chips, we can't currently POST them from scratch.


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[Bug 23672] Nouveau KMS fails with error: Failed to fence channel 0

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

[-- Attachment #1.1: Type: text/plain, Size: 1289 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=23672

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
It appears that this bug report has laid dormant for quite a while. Sorry we
haven't gotten to it. Since we fix bugs all the time, chances are pretty good
that your issue has been fixed with the latest software. Please give it a shot.
(Linux kernel 3.10.7, xf86-video-nouveau 1.0.9, mesa 9.1.6, or their git
versions.) If upgrading to the latest isn't an option for you, your distro's
bugzilla is probably the right destination for your bug report.

In an effort to clean up our bug list, we're pre-emptively closing all bugs
that haven't seen updates since 2011. If the original issue remains, please
make sure to provide fresh info, see http://nouveau.freedesktop.org/wiki/Bugs/
for what we need to see, and re-open this one.

Thanks,

The Nouveau Team

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