I have the same bug on mint 17.2 cinnamon 64 bit, ver. 2.6.13, kernel: 3.19.0-22-generic, card nvidia GTF108M (GeForce GT 635M).
After fresh install it all worked well, but system asked for updates in next days so I did. Because my card was running rather hot (60-70 degrees of Celsius) and depleted batter in 20 minutes (1-1,5 hour work time on windows 8.1), I updated kernel to the newest one from update manager. After I rebooted system, nvidia shows that default driver in power saving mode is turned on. Attempt to switch back to nvidia results in some empty cloud message and nothing happens (default generic driver is again marked as on). However I noticed that computers is not heating any more and my battery life extended to 50 minutes. Graphic seems to be fine as far I can tell at the moment so I decided to let this problem go + I'm newbie in linux and I'm afraid that any attempts to fix it would only mess my installation. However it would be nice to be able to choose the drivers/card - at the moment I can't. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1310023 Title: 14.04: Nvidia Prime is unable to switch to the Nvidia card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1310023/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
