Bug 75813

Summary: [NV40] X hangs, system unresponsive
Product: xorg Reporter: Marco van Hulten <marco>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: NEW --- QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: medium    
Version: 7.7 (2012.06)   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
i915 platform: i915 features:
Description Flags
xorg log (does not contain errors, but X became unusable) none

Description Marco van Hulten 2014-03-05 20:10:42 UTC
Once every day or so my system practically hangs (gets extremely unresponsive; X unusable; only SysRq magic working) while using Xorg with the nouveau driver (version 1.0.10).

I am running Debian GNU/Linux testing (jessie) with

$ uname -r
$ lspci | grep VGA
05:00.0 VGA compatible controller: NVIDIA Corporation NV40 [GeForce 6800 GT/GTO/Ultra] (rev a2)

This problem did not occur when I ran Debian stable (with nouveau).

When the system (practically) hangs, I get messages like this:

... GPU lockup - switching to software fbcon
nouveau E [Xorg] failed to idle channel 0xcccc0000 [ ...
Comment 1 Ilia Mirkin 2014-03-05 20:48:40 UTC
Full dmesg would be great, esp the messages that led up to the GPU lockup. If you have libvdpau_nouveau.so installed, try removing it, that has been reported to cause issues on nv4x's.
Comment 2 Marco van Hulten 2014-03-08 19:13:26 UTC
I am afraid that I have not saved the Xorg log with these messages (of the crash).  Moreover, I have not experienced crashes since my bug report.

I had not installed libvdpau_nouveau.so, but I did have libvdpau.so as a dependency of the mplayer2 package.  Is this the same thing?  I removed it and after that reinstalled it.  Possibly the library is different from before, since before I used the debian-multimedia repository which may have contained this library, but not anymore since that repo has become obsolete for Debian.

I will report again when the problem returns.  If I will not report within two weeks or so, we should close this bug report.
Comment 3 Marco van Hulten 2014-03-08 19:36:43 UTC
Forget most of my previous message.  It now appears to be the case that I have crashes in combination with certain kernel:

3.2.0-3-amd64    CRASH
3.7-trunk-amd64  no problem
3.12-1-amd64     CRASH
3.13-1-amd64     CRASH

As soon as I have an Xorg log with the error, I will post it here.
Comment 4 Marco van Hulten 2014-03-09 17:19:53 UTC
Created attachment 95420 [details]
xorg log (does not contain errors, but X became unusable)

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