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So I updated to Ubuntu 14.04 and found that the primusrun command no longer works, so ditched bumblebee in favour of nvidia-prime. This lets you switch video card from nvidia-settings rather than running through the command line (I prefer the old method, but want the primus performance).

The problem is that after switching to Intel from nvidia-settings, I can no longer open it up again to switch back to the nvidia card. When I open nvidia-settings I get a segmentation fault (according to the terminal).

Is there any way to open nvidia-settings switch back? I would like the ability to be able to switch between the two since having the nvidia card on all the time kills my battery and heats up the laptop a lot.

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up vote 20 down vote accepted

This is a bug (LP #1214508).

You can switch using:

sudo prime-select intel
sudo prime-select nvidia

Also, Bumblebee is still supported so you can install it if you prefer. You'll have to remove nvidia-prime then as you can't use both.

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Yes, that worked (after logging out and back in). Thank you! I do prefer using bumblebee, but after the update to 14.04, only optirun worked and not primusrun (everything I ran gave a segmentation fault). Ideally, I would like to return to using the primusrun command, but if this is the only way I can get the extra performance, then I'll use this. – user270340 May 2 '14 at 14:23

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