I discovered that I have been running on old kernel since upgrade to 14.10. Installing newest kernel+ headers and reinstalling nvidia drivers solved the case.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1401648 Title: Prime profiles stop working after upgrade to newer nvidia driver Status in xorg package in Ubuntu: New Bug description: Hi! Today I upgraded nvidia driver to nvidia 331.113 and nvidia does not seem to work anymore. I have optimus mode laptop, so my Intel works fine, but I cannot switch to NVidia using nvidia-settings. When I try, the application asks me to log out and in again. If I do this, the screen flickers and falls back to intel. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: xorg 1:7.7+7ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Thu Dec 11 20:38:27 2014 DistUpgraded: 2014-10-22 17:37:34,054 DEBUG enabling apt cron job DistroCodename: utopic DistroVariant: ubuntu DkmsStatus: bbswitch, 0.7: added nvidia-331, 331.113: added nvidia-331-uvm, 331.113: added virtualbox, 4.3.18, 3.13.0-24-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:3977] NVIDIA Corporation GK107M [GeForce GTX 660M] [10de:0fd4] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:3977] InstallationDate: Installed on 2014-04-05 (250 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140405) MachineType: LENOVO 20132 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=8a09eb42-b431-491c-8eb8-692d800ef5c6 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to utopic on 2014-10-22 (50 days ago) dmi.bios.date: 10/11/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 5DCN90WW(V8.01) dmi.board.asset.tag: No Asset Tag dmi.board.name: INVALID dmi.board.vendor: LENOVO dmi.board.version: 31900003WIN8 STD MLT dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo IdeaPad Y580 dmi.modalias: dmi:bvnLENOVO:bvr5DCN90WW(V8.01):bd10/11/2012:svnLENOVO:pn20132:pvrLenovoIdeaPadY580:rvnLENOVO:rnINVALID:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadY580: dmi.product.name: 20132 dmi.product.version: Lenovo IdeaPad Y580 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.56-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2 xserver.bootTime: Thu Dec 11 20:03:05 2014 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 826 vendor LGD xserver.version: 2:1.16.0-1ubuntu1.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1401648/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp