I am experiencing the same problem on a Dell XPS 9550 with a GTX 960M. I just upgraded from 16.04 where prime-select was able to power the graphics card down with bbswitch.
Strangely enough even nouveau is perfectly capable of powering down the card if it does not have nouveau.run-pm=0 which disables the power management feature. Sadly this is in the grub config generated by prime-select intel. For now i have removed the nvidia proprietary drivers to get back decent battery life. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1765363 Title: prime-select intel is not powering off the nvidia card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1765363/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
