"PRIME Profiles" option no longer available in Nvidia Settings

[Alin Andrei]

After a recent update, the "Prime Profiles" option disappeared from Nvidia Settings. I'm not sure if this is a bug in Nvidia-Settings or something else though... because prime-select doesn't work either:
$ sudo prime-select intel
Error: alternatives are not set up properly
Error: intel mode can't be enabled

Let me know any info you may need...

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: nvidia-settings 331.20-0ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-21.43-generic 3.13.8
Uname: Linux 3.13.0-21-generic x86_64
ApportVersion: 2.14-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Apr 2 19:51:01 2014
InstallationDate: Installed on 2012-12-30 (458 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
SourcePackage: nvidia-settings
UpgradeStatus: Upgraded to trusty on 2013-01-12 (445 days ago)

[Alin Andrei (nilarimogard)]

I've managed to fix this by blacklisting nouveau:

$ cat /etc/modprobe.d/blacklist-nouveau.conf
blacklist nouveau
blacklist lbm-nouveau
alias nouveau off
alias lbm-nouveau off

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Luis Colunga (lccolunga91)]

Helllo, I tried blacklisting noveau by the way Alin suggested but I am still having the same issue. This is a fresh install on 14.04

[Sam Gonvor (iacovosd)]

I cannot perform the fix suggested. One moment prime was working fine and the next it wasn't an option any more.

[Sam Gonvor (iacovosd)]

Interestingly enough after purging everything and reinstalling a few times (I even tried bumblebee again) it stated to work miraculously.

[Jason D. (tronman)]

Blacklisting the nouveau driver worked for me. Thanks!