Public bug reported:

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)

** Affects: nvidia-graphics-drivers-331 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug utopic

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https://bugs.launchpad.net/bugs/1363408

Title:
  nvidia proprietary drivers are broken

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