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[Geoff Williams <1438708@xxxxxxxxxxxxxxxxxx>]

** Attachment added: "log file showing crash - search for the word 'stack'"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1438708/+attachment/4362057/+files/kern.log

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https://bugs.launchpad.net/bugs/1438708

Title:
  frequent lockups asus g705js/GeForce GTX 870M

Status in linux package in Ubuntu:
  New

Bug description:
  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
  =========
  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.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-33-generic 3.16.0-33.44
  ProcVersionSignature: Ubuntu 3.16.0-33.44-generic 3.16.7-ckt7
  Uname: Linux 3.16.0-33-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu8.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  geoff      3257 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Wed Apr  1 01:05:31 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-09-23 (189 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  MachineType: ASUSTeK COMPUTER INC. G750JS
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-33-generic.efi.signed root=UUID=3fc94323-d40a-42ca-87c7-28a9e52ebcf4 ro recovery nomodeset
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-33-generic N/A
   linux-backports-modules-3.16.0-33-generic  N/A
   linux-firmware                             1.138.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2015-03-29 (2 days ago)
  dmi.bios.date: 07/17/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: G750JS.208
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: G750JS
  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.:bvrG750JS.208:bd07/17/2014:svnASUSTeKCOMPUTERINC.:pnG750JS:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG750JS:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: G750JS
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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