On Fri, Jan 04, 2013 at 01:21:14PM +0100, Kees Bakker wrote:Sorry about that. That was a typo. I meant to say:Hi,This is userspace bug. See below.
Right after I upgraded to Ubuntu quantal I started seeing these
Jan 4 12:18:12 koli kernel: [ 3705.970720] nouveau E[ DRM] fail ttm_validate
Jan 4 12:18:12 koli kernel: [ 3705.970726] nouveau E[ DRM] validate vram_list
Jan 4 12:18:12 koli kernel: [ 3705.970760] nouveau E[ DRM] validate: -12
A few times I had corrupted graphics, and I had to stop X. Restarting didn't(Please do not use distro codenames when reporting bugs upstream)
help and I had to reboot.
I'm running my own 3.7.1 kernel, so I also installed the 3.7.0 development kernel
from Ubuntu (3.7.0-7). And that kernel shows these messages too.
With the Ubuntu kernel the graphics corruption is milder. I can continue to work. Sometimes
I get a burst of the messages, but I have no clue how it is triggered.
Now the strange thing is that I was running my 3.7.1 kernel on Ubuntu precise
and I have never seen these messages before. What could be the case is that
xorg is doing something new and that is causing the errors.
Quantal, being newer release than Precise, ships much older Nouveau DDX, WTF?
You used some PPA with Precise?
0.0.16 is known to behave like that - you need to upgrade to >= 1.0.