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enter image description hereI'm having an issue with my nvidia-331 driver. I can't seem to switch between Intel and Nvida via nvidia-settings. The option is there but when I click 'nvidia' a blank error window pops up. It's very weird because I've been using the Ubuntu daily for a while on 14.04, and it was not until yesterday's update that I've had this issue. Same driver. Does anyone know how to fix this? Thanks. I've tried a clean install and have the same issue.

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The same issue I also have. Even when I have my external monitor connected the mouse pointer flickering. From my point of view Ubuntu 14.04 Alpha and Beta was more stable than the final release. Strange! –  vasiauvi Apr 19 at 10:52
    
did you try sudo prime-switch nvidia? –  Gant Apr 20 at 12:36
    
I resolved the issue by re-installing Ubuntu. Thanks for the suggestion though. @vasiauvi –  Brandex Apr 21 at 20:49
    
Same issue here as well, still no way found to fix it. By the way, from the time that nvidia-prime has stopped working, Bumblebee has started to work (while when nvidia-prime worked, bumblebee was not). –  user273314 Apr 23 at 21:43
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5 Answers 5

up vote 3 down vote accepted

I also had the same problem but only after I made some modification on compiz.

For the fix, I just reinstalled the nvidia drivers and nvidia prime with

sudo apt-get purge libvdpau-va-gl1 bumblebee* nvidia*
sudo apt-get install nvidia-331 nvidia-settings nvidia-prime
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For me I actually just went into my bios changed it to use discrete only, boot back into ubuntu, and then made sure nvidia x server was running properly, rebooted again and changed it back to optimus and it fixed the error.

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This isn't an option in the bios of my UX32VD but that makes sense for other laptops. Thanks though. –  Brandex Apr 26 at 19:43
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is it normal that you only have tha Application Profiles and the nvidia-settings configuration panels alongside prime? There should be a lot more stuff, or it works okay?

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It seems that, when put into intel mode, the nvidia options disappear. When i put the laptop into nvidia mode, they reappear. –  Brandex Apr 26 at 19:40
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Im using Lenovo Ideapad S410p with Nvidia GT 720M with Ubuntu 14.04 64bits after the same problem and expend many days trying to fix all and I try all since xorg-edgers install nvidia drivers and a lot of etc...., I can fix the problem making a new clean installation, so for me some config files, installations and residual info was wrong with my previous trys to fix.

Now Nvidia settings works too and dont show me the bug reported here and in launchpad (Bug 1310023) If someone have the same dont forget report it too in Launchpad.

Hope this helps.

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If you encounter the problem with prime like an empty popup error in nvidia-settings panel you can see the bug in Launch Pad 1310023. I have encounter a similar problem and I can correct them with that:

sudo update-alternatives --config x86_64-linux-gnu_gl_conf
sudo ldconfig -n
sudo update-initramfs -u

then reboot and see if it works

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