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[Anonymous Linux User <1405489@xxxxxxxxxxxxxxxxxx>]

Upgraded to Kubuntu 15.04 and with that came nvidia 346.59

 (  346.59-0ubuntu1 )

$ uname -a
Linux redacted 3.19.0-16-generic #16-Ubuntu SMP Thu Apr 30 16:09:58 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ dpkg --list | grep 346.59
ii  libcuda1-346                                  346.59-0ubuntu1                            amd64        NVIDIA CUDA runtime library
ii  libxnvctrl0                                   346.59-0ubuntu1                            amd64        NV-CONTROL X extension (runtime library)
ii  nvidia-346                                    346.59-0ubuntu1                            amd64        NVIDIA binary driver - version 346.59
ii  nvidia-opencl-icd-346                         346.59-0ubuntu1                            amd64        NVIDIA OpenCL ICD
ii  nvidia-settings                               346.59-0ubuntu1                            amd64        Tool for configuring the NVIDIA graphics driver


You can specify which GPU to use with the program nvidia-settings.
Using: the GPU  "PRIME Profiles" set for "Intel (Power Saving Mode)" which sets:
$cat /proc/acpi/bbswitch 
0000:01:00.0 OFF

After a few days of this setting I can report that the issue of the
dimming screen and random lock-ups seems to have disappeared.

----

I've just now run nvidia-settings to change back to use the GPU that's
labeled "NVIDIA (Performance Mode)"  and will update in later if this
also no-longer has the issue.

Tentatively reporting as fixed pending further testing .

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-331 in Ubuntu.
https://bugs.launchpad.net/bugs/1405489

Title:
   [HP ZBook 15 Mobile Workstation] Ubuntu 14.10 random freeze and lock
  up with NVIDIA

Status in nvidia-graphics-drivers-331 package in Ubuntu:
  Expired

Bug description:
  Ubuntu 14.10 has random freezes and lock ups while using NVIDIA
  331.113.

  WORKAROUND: Use nouveau.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-28-generic 3.16.0-28.38
  ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
  Uname: Linux 3.16.0-28-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  afan       9511 F.... pulseaudio
   /dev/snd/controlC0:  afan       9511 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Wed Dec 24 16:49:50 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-12-23 (1 days ago)
  InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: Hewlett-Packard HP ZBook 15
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic root=UUID=31ffafeb-d84a-4173-81a4-99a3bde628f3 ro quiet splash rcutree.rcu_idle_gp_delay=1
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-28-generic N/A
   linux-backports-modules-3.16.0-28-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/13/2014
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L70 Ver. 01.21
  dmi.board.name: 1909
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 94.53
  dmi.chassis.asset.tag: USH446L1YV
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrL70Ver.01.21:bd08/13/2014:svnHewlett-Packard:pnHPZBook15:pvrA3009DD10203:rvnHewlett-Packard:rn1909:rvrKBCVersion94.53:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ZBook 15
  dmi.product.version: A3009DD10203
  dmi.sys.vendor: Hewlett-Packard

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