The prime-select window becomes unresponsive during switch process

[Doug McMahon]

When using the prime profile window to switch profiles the window becomes unresponsive during that process.
This may take 10 -15 seconds or so to complete. If the user wonders what's going on & happens to click on the launcher icon a pop up appears stating window is unresponsive & offers to force quit it..
Doing so may leave the user's install in an inconsistent state & unable to subsequently boot up.
An example in screen where profile was switched to intel but prime-profile quit before the nvidia-blacklist.conf was created.
In this case prime-select intel won;t work & prime-select nvividia won't work either. Only way out is to either remove nvidia* or put a blacklist file in /etc/modeprobe.d/

During this new, extended switching process the user should be given some indication the process is ongoing..

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nvidia-prime 0.8.6
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
Date: Thu Mar 22 21:36:27 2018
Dependencies:

PackageArchitecture: all
SourcePackage: nvidia-prime
UpgradeStatus: No upgrade log present (probably fresh install)

[Doug McMahon (mc3man)]

Example of unresponsive window

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alberto Milone (albertomilone)]

That is a known issue. I had code to add a progress bar, but it was unfinished, so I preferred to simply restore the old behaviour for now. The prime-select tool takes a while to complete.

[Vasyl (exposight)]

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