Dieter Maurer:
>"It may take a bit of time before I can make the tests with the current Ubuntu 

If the problem is reproducible in a live environment, then testing that
would be fine.

>"And, I fear that such tests might not be reliable: after the temporary
use of the NVidia driver I could use the "nouveau" driver for some time
even without the special boot parameter "nouveau.config=NvMSI=0" - only
after some months, new freezes occurred."

Such test is reliable, in that it provides additional data points with
later versions of various related packages. This is required in order to
upstream an issue for upstream developers to address.

Despite this, if one notices different environment behavior with nouveau
after such maneuvering, the proprietary driver may be twiddling some
bits that luckily improve stability after removal. It could also be a

>"I have the feeling that the problem (now) arises non-deterministically
-- likely dependent on environment factors such as temperature and/or

Evidence and data are helpful, guesses/feelings/hunches aren't. One may
monitor internal temperatures via in order to prove a

>"While freezes are now rather rare for me, I often observe that the top
bars of my windows (usually black) are drawn in an irregular black/white
pattern (similar to the freeze pattern) when I move the mouse pointer
over the bar."

This report is scoped to freezing/crashing. If you are having graphical
issues without freezing/crashing that's a different problem for a new
report. Feel free to file a new one scoped to that and subscribe me to

You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to xorg in Ubuntu.

  [GeForce 7025 / nForce 630a] System freeze

Status in xorg package in Ubuntu:

Bug description:
  Yesterday, I upgraded from Ubuntu 12.04 via 14.04 to 16.04. From 14.04
  on, I was unable to graphically log in. A few seconds after the login
  (varying between 1 and 10 s), the screen changed to a pattern with
  dense white stripes on the violet/red background, and X froze (no
  reaction to mouse or keyboard). The latest messages in
  "/var/log/syslog" each time showed varying "nouveau E" problems, e.g.
  "unrecognized interupt", "PFIFO", or "PBUS" problems such as e.g.:
  "nouveau E[    PBUS][0000:00:0d.0] MMIO write of 0x01f70001 FAULT at
  0x00b010" (values and addresses varying).

  Usually, the freeze happens when e.g. "firefox" is started (which
  happens in my context automatically after a graphical login). In my
  case, the NVidia driver could not be started (I did not investigate
  why). Using boot parameter "nouveau.config=NvMSI=0" made the graphical
  login successful again.

  Today, I wanted to report the bug with "ubuntu-bug". However, during
  the collection of the system information, the error happened again
  (despite the "nouveau.config" boot parameter).

  Syslog gives:
  Dec 13 11:12:01 localhost CRON[5230]: (root) CMD (   test -x 
/etc/cron.daily/popularity-contest && /etc/cron.daily/popularity-contest 
  Dec 13 11:14:16 localhost kernel: [ 6889.138599] nouveau E[    
PBUS][0000:00:0d.0] MMIO write of 0x07920001 FAULT at 0x00b020
  Dec 13 11:14:16 localhost kernel: [ 6889.140532] nouveau E[    
PBUS][0000:00:0d.0] MMIO write of 0x07920001 FAULT at 0x00b020
  Dec 13 11:14:59 localhost dbus[795]: [system] Activating service 
name='com.ubuntu.SoftwareProperties' (using servicehelper)
  Dec 13 11:14:59 localhost dbus[795]: [system] Successfully activated service 
  Dec 13 11:15:01 localhost CRON[5285]: (root) CMD (command -v debian-sa1 > 
/dev/null && debian-sa1 1 1)
  Dec 13 11:17:01 localhost CRON[5303]: (root) CMD (   cd / && run-parts 
--report /etc/cron.hourly)
  Dec 13 11:20:01 localhost CRON[5327]: (smmsp) CMD (test -x 
/etc/init.d/sendmail && test -x /usr/share/sendmail/sendmail && test -x 
/usr/lib/sm.bin/sendmail && /usr/share/sendmail/sendmail cron-msp)
  Dec 13 11:22:20 localhost kernel: [ 7372.621357] nouveau E[    
PBUS][0000:00:0d.0] MMIO write of 0x00000000 FAULT at 0x00b020
  Dec 13 11:25:01 localhost CRON[5580]: (root) CMD (command -v debian-sa1 > 
/dev/null && debian-sa1 1 1)
  Dec 13 11:35:01 localhost CRON[5651]: (root) CMD (command -v debian-sa1 > 
/dev/null && debian-sa1 1 1)
  Dec 13 11:38:02 localhost gnome-session[2248]: Gtk-Message: GtkDialog mapped 
without a transient parent. This is discouraged.
  Dec 13 11:39:01 localhost CRON[5723]: (root) CMD (  [ -x 
/usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d 
/var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 
  Dec 13 11:39:01 localhost CRON[5722]: (root) CMD (  [ -x 
/usr/lib/php/sessionclean ] && /usr/lib/php/sessionclean)
  Dec 13 11:39:46 localhost gnome-session[2248]: Gtk-Message: GtkDialog mapped 
without a transient parent. This is discouraged.

  At this point, I had to reset the computer.

  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: i386
  DistUpgraded: 2016-12-12 17:25:47,166 DEBUG Running PostInstallScript: 
  DistroCodename: xenial
  DistroRelease: Ubuntu 16.04
  DistroVariant: ubuntu

  ExtraDebuggingInterest: Yes
   NVIDIA Corporation C61 [GeForce 7025 / nForce 630a] [10de:03d6] (rev a2) 
(prog-if 00 [VGA controller])
     Subsystem: ASRock Incorporation C61 [GeForce 7025 / nForce 630a] 
  InstallationDate: Installed on 2013-01-21 (1838 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  Package: xorg 1:7.7+13ubuntu3
  PackageArchitecture: i386
   PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-112-generic 
root=UUID=9c03cebc-9cba-47bc-9974-5c236a34906e ro nouveau.config=NvMSI=0
  ProcVersionSignature: Ubuntu 4.4.0-112.135-generic 4.4.98
  Tags:  xenial ubuntu
  Uname: Linux 4.4.0-112-generic i686
  UpgradeStatus: Upgraded to xenial on 2016-12-12 (416 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True 05/27/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.30 N68-S3 UCC
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
dmi:bvnAmericanMegatrendsInc.:bvrP1.30:bd05/27/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68-S3UCC:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.
  version.compiz: compiz 1:
  version.libdrm2: libdrm2 2.4.83-1~16.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu1~16.04.4
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu1~16.04.4
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.7
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 

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