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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1405489/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp