That was most likely caused by initramfs update in the background that is no more performed after https://bugs.launchpad.net/ubuntu/+source /nvidia-prime/+bug/1778011 fixed, released in version 0.8.8.1
** Changed in: nvidia-prime (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1758214 Title: The prime-select window becomes unresponsive during switch process To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1758214/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs