Installing the nvidia driver from the nvidia installer can break your system.
Also, nvidia-persistenced failed because (for some reason) the driver failed to load. There's no way to see what went wrong now, since you used the installer. If you feel like reinstalling Ubuntu and trying the driver that we provide again, I will help you diagnose the problem. In the meantime I'm marking the bug report as incomplete as no relevant logs are attached. Next time you might want to file the bug report using the following command so that the relevant logs are automatically attached for you: ubuntu-bug nvidia-331 ** Changed in: nvidia-graphics-drivers-331 (Ubuntu) Status: Confirmed => Incomplete -- 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/1363408 Title: nvidia proprietary drivers are broken Status in “nvidia-graphics-drivers-331” package in Ubuntu: Incomplete Bug description: I upgrade Kubuntu 14.04 to 14.10 and noticed that all desktop effects became slow. In my dmesg I have these lines [ 17.039854] init: Failed to spawn nvidia-persistenced main process: unable to execute: No such file or directory [ 17.040940] init: nvidia-prime main process (2139) terminated with status 1 And it seems that something wrong with path/directories where scripts perform search for nvidia binaries. For example, in /etc/init/nvidia-persistenced.conf we can find this: exec /usr/bin/nvidia-persistenced --user nvidia-persistenced but, I really have not nvidia-persistenced binary in /usr/bin/, it is in /usr/lib/nvidia-331/bin/ Also, after installing nvidia-331 I have not nvidia-xconfig command in shell, but I have /usr/lib/nvidia-331/bin/nvidia-xconfig ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: nvidia-331 331.89-0ubuntu2 ProcVersionSignature: Ubuntu 3.16.0-11.16-generic 3.16.1 Uname: Linux 3.16.0-11-generic x86_64 ApportVersion: 2.14.7-0ubuntu1 Architecture: amd64 CurrentDesktop: KDE Date: Sat Aug 30 15:53:02 2014 InstallationDate: Installed on 2014-07-05 (55 days ago) InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1) SourcePackage: nvidia-graphics-drivers-331 UpgradeStatus: Upgraded to utopic on 2014-08-30 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1363408/+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