drm/nouveau E[ DRM] fail ttm_validate

[Kees Bakker]

Hi,

Right after I upgraded to Ubuntu quantal I started seeing these
messages:
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
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.

xserver-xorg-video-nouveau
  precise 1:1.0.2-0ubuntu3
  quantal 1:0.0.16+git20111201+b5534a1-1build2

Some more details
/var/log/syslog:Jan  4 11:16:42 koli kernel: [    0.000000] Linux version 3.7.0-7-generic (root@koli) (gcc version 4.7.2 (Ubuntu/Lin
/var/log/syslog:Jan  4 11:16:44 koli kernel: [   18.081288] [drm] Initialized drm 1.1.0 20060810
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.615246] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x04b300b1
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.615251] nouveau  [  DEVICE][0000:01:00.0] Chipset: G73 (NV4B)
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.615254] nouveau  [  DEVICE][0000:01:00.0] Family : NV40
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.616802] nouveau  [   VBIOS][0000:01:00.0] checking PRAMIN for image...
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.655315] nouveau  [   VBIOS][0000:01:00.0] ... appears to be valid
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.655320] nouveau  [   VBIOS][0000:01:00.0] using image from PRAMIN
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.655505] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.655509] nouveau  [   VBIOS][0000:01:00.0] version 05.73.22.67
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.660805] nouveau  [     PFB][0000:01:00.0] RAM type: DDR2
/var/log/syslog:Jan  4 11:16:45 koli kernel: [   18.660811] nouveau  [     PFB][0000:01:00.0] RAM size: 256 MiB

--
Kees Bakker

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