[Nouveau] [Bug 59069] New: nouveau E[ DRM] fail ttm_validate

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59069

          Priority: medium
            Bug ID: 59069
          Assignee: nouveau at lists.freedesktop.org
           Summary: nouveau E[     DRM] fail ttm_validate
        QA Contact: xorg-team at lists.x.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kees.bakker at xs4all.nl
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 72569
  --> https://bugs.freedesktop.org/attachment.cgi?id=72569&action=edit
/var/log/kern.log

After upgrading from Ubuntu precise to quantal there are lots of messages like
these
(attachment has /var/log/kern.log of the time when that happened)

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

and there is graphics corruption. After a while it gets really bad so that I
have to stop X. After restarting
X the graphics adapter is still unusable, graphics remain distorted.

By that time the following messages can be seen in /var/log/kern.log

Jan  4 15:08:23 koli kernel: [13917.531124] nouveau  [  PGRAPH][0000:01:00.0] 
ERROR nsource: LIMIT_COLOR nstatus: PROTECTION_FAULT
Jan  4 15:08:23 koli kernel: [13917.531137] nouveau E[  PGRAPH][0000:01:00.0]
ch 3 [0x0013c000] subc 7 class 0x4097 mthd 0x0204 data 0x00180000
Jan  4 15:08:26 koli kernel: [13920.488008] nouveau E[     DRM] reloc wait_idle
failed: -16
Jan  4 15:08:26 koli kernel: [13920.488013] nouveau E[     DRM] reloc apply:
-16
Jan  4 15:08:26 koli kernel: [13920.492005] [sched_delayed] sched: RT
throttling activated
Jan  4 15:08:29 koli kernel: [13923.600790] nouveau E[     DRM] fail
ttm_validate
Jan  4 15:08:29 koli kernel: [13923.600796] nouveau E[     DRM] validate
vram_list
Jan  4 15:08:29 koli kernel: [13923.600803] nouveau E[     DRM] validate: -16
Jan  4 15:08:35 koli kernel: [13929.600009] nouveau E[     DRM] reloc wait_idle
failed: -16
Jan  4 15:08:35 koli kernel: [13929.600014] nouveau E[     DRM] reloc apply:
-16
Jan  4 15:09:42 koli kernel: [13993.332007] nouveau E[    1701] failed to idle
channel 0xcccc0001
Jan  4 15:09:42 koli kernel: [13996.332006] nouveau E[    1701] failed to idle
channel 0xcccc0000
Jan  4 15:09:59 koli kernel: [14010.792008] nouveau E[  PGRAPH][0000:01:00.0]
idle timed out with status 0x0be80001
Jan  4 15:10:01 koli kernel: [14013.614181] nouveau E[  PGRAPH][0000:01:00.0]
idle timed out with status 0x0be80001
Jan  4 15:10:03 koli kernel: [14016.824509] [TTM] Failed to expire sync object
before buffer eviction

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