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[Geoff Williams <1371401@xxxxxxxxxxxxxxxxxx>]

Summary
=======
I think I am affected by this same bug, I have all the above systems and get hard lockups with Linux kernel 3.16 every 5 - 15 minutes.

Attempted upgrading to (x)ubuntu 14.10 to see if this improved stability
and laptop crashed so badly during the upgrade that it broke grub and
had to be recovered with ubuntu boot-repair.  This alowed the system to
boot and I was able to complete configuration with dkpg --configure -a
--pending

System still crashes every few minutes when running (x)ubuntu 14.10 and
about 50% of the time crashes before even reaching the login screen.  If
I'm lucky attempting to swich VCs will resolve things but the system
always crashes eventually and has to be powered off by holiding the
power button for 10 seconds or via the magic sysreq key.  No other key
cominations work.

Hardware
========
I also have an Asus laptop with an Nvida card which is what led me to this bug report, the following hardware is present:
* Laptop model Asus G750JS (ASUS-NotebookSKU)
* GK104M [GeForce GTX 870M]
* 4th Gen Core Processor Integrated Graphics Controller (i915 - not used)
* BCM4352 802.11ac Wireless Network Adapter
* QCA8171 Gigabit Ethernet

BIOS/DMI information
==================
I tried flashing the latest BIOS from (http://www.asus.com/Notebooks_Ultrabooks/ASUS_ROG_G750JS/HelpDesk_Download/) but it didn't fix anything.

Running the commands listed above gives:
$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
G750JS.208
07/17/2014

Driver info
========
This problem occurs with both the nouveau and nvidia drivers:
rc  nvidia-331-updates                          331.113-0ubuntu0.0.4 (removed by "additional drivers" application)
ii  xserver-xorg-video-nouveau                  1:1.0.11-1ubuntu2 

Workaround
==========
This configuration is rock solid on kernel 3.13.  I was able to boot to a previously installed kernel (3.13.0-44-generic) and the system performs as expected and is stable.

Debug info
=========
I was able to take a photo after the ubuntu system upgrade crashed (attached).  The system has been generating a bunch of problem reports too so I've been clicking the submit button.  Happy to rovide futher info or try a few experiments to get this resolved.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1371401

Title:
  randomly freezing

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Seems to be related to https://bugs.launchpad.net/ubuntu/+source
  /nvidia-prime/+bug/1220426

  ASUS N550JK 
  Touchscreen
  nVidia 343 graphics on Geforce GTX 850M
  Latest Linux kernel 3.16, Ubuntu 14.04 with xfce
  Screen can be unfrozen by doing ctrl+alt+f6 and then back with ctrl+alt+f6.
  Sometimes the touch screen and keyboard will continue to work but the touchpad will not.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  Uname: Linux 3.16.0-031600-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  343.13  Thu Jul 31 19:06:44 PDT 2014
   GCC version:  gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
  ApportVersion: 2.14.1-0ubuntu3.4
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Thu Sep 18 23:12:46 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.13.0-35-generic, x86_64: installed
   bbswitch, 0.7, 3.16.0-031600-generic, x86_64: installed
   nvidia-343, 343.13, 3.16.0-031600-generic, x86_64: installed
   psmouse, elantech-x551c, 3.13.0-35-generic, x86_64: installed
   psmouse, elantech-x551c, 3.16.0-031600-generic, x86_64: installed
  GraphicsCard:
   Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:11cd]
     Subsystem: ASUSTeK Computer Inc. Device [1043:11cd]
  InstallationDate: Installed on 2014-09-17 (1 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: ASUSTeK COMPUTER INC. N550JK
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-031600-generic root=UUID=31b12bbb-0095-44fd-b6e6-6964171a74b2 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/23/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: N550JK.204
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: N550JK
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN550JK.204:bd01/23/2014:svnASUSTeKCOMPUTERINC.:pnN550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: N550JK
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Thu Sep 18 22:30:52 2014
  xserver.configfile: /etc/X11/xorg.conf
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.1-0ubuntu2.1

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