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[PorkCharSui <1424013@xxxxxxxxxxxxxxxxxx>]

Hello everybody,

This bug still exists. It happens on several of my systems (sysop @
university).

My test system:
 HP Compaq 8200 Elite CMT (hardware spec: http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c02779501)
with an extra video-card:
 Geforce 7300 GS

I've tried nouveau and proprietary drivers.

I'm running Ubuntu 14.04.2. Packages are as up-2-date as they're going
to get.

uname -a:
 Linux HOSTNAME 3.13.0-55-generic #92-Ubuntu SMP Sun Jun 14 18:32:20 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

We use lightdm, but light-locker is removed, because it causes trouble
on other fronts. We also offer a multitude of WM's to our users, with
all the trouble that causes :(. We've installed ubuntu-desktop, xubuntu-
desktop, kde-workspace, gnome(classic), i3-wm, XMonad, Openbox.

Most of our systems have very similar hardware, they're all HP Compaq
systems (some a bit older, some newer). The trouble seems to be with the
older NVIDIA card, because that's the same on all the troublesome
systems.

The fix Eloy Paris mentioned in comment #14 is the only thing so far
that resolves the issue. Thankfully we use Puppet to manage our
workstations, so implementing it wasn't too difficult, but I would very
much like to see a more permanent solution.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/1424013

Title:
  Compiz high CPU and UI freeze on NVIDIA after fix for #269904 in
  trusty-updates

Status in Compiz:
  Fix Committed
Status in Compiz 0.9.11 series:
  Fix Committed
Status in compiz package in Ubuntu:
  Fix Released
Status in compiz source package in Trusty:
  Fix Released

Bug description:
  [ Impact ]

  Immediately after the fix for #269904 landed in trusty-updates via
  compiz 1:0.9.11.3+14.04.20150122-0ubuntu1, my 14.04 machine with an
  NVIDIA card and using the nvidia-304 driver became unusable -- symtoms
  include compiz process high CPU (100%), UI freeze right after logging
  in (machine still up, reachable via SSH from the network), and a flood
  of these messages on the system log.

  [ Test Case ]

  Requires a GeForce 6150SE or similar integrated GPU from nVidia.
  Problem manifests immediately on login.

  [ Regression Potential ]

  The fix involves a specific hardware blacklist.  Anticipated
  regressions include fixed support for the specific hard in future
  nVidia driver releases and potentially additional unidentified
  hardware affected by this bug needing to be added to the blacklist.

  Note that there is a manual workaround to the problem consisting of
  disabling the X11 Sync feature through CCSM.

  [ Other Info ]

  This fix was cherry-picked from the Ubuntu "Vivid Vervet" development
  release where it has been in regular use for some weeks.

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