nvidia-prime-boot.service: Main process exited, code=exited, status=2/INVALIDARGUMENT

[Giraffe]

Since this week (i believe April 9th) Nvidia-prime isn't working for me.

Running:
Distributor ID: Ubuntu
Description: Ubuntu Bionic Beaver (development branch)
Release: 18.04
Codename: bionic

Nvidia-prime version:

Nvidia-prime version:
  Installed: 0.8.7
  Candidate: 0.8.7
  Version table:
 *** 0.8.7 500

Error code:
apr 14 11:56:33 Precision-7510 systemd[1]: nvidia-prime-boot.service: Main process exited, code=exited, status=2/INVALIDARGUMENT

apr 14 11:56:33 Precision-7510 systemd[1]: nvidia-prime-boot.service: Failed with result 'exit-code'.

[op3ntrap (op3ntrap)]

Hi,
I too had the same problem and after some digging I found out that the file from which the service runs is:
/etc/systemd/system/display-manager.service.wants/nvidia-prime-boot.service

the service used vgaswitcheroo module to switch off the dGPU. However I think most of use i915 or modesetting driver which doesn't give the "vgaswitcheroo" module.

I changed my file to the attached copy.

Basically instead of using vgaswitcheroo, you can use
   "echo 'auto' > '/sys/bus/pci/devices/0000:01:00.0/power/control'" to switch off your dGPU.

[Giraffe (dodger-forum)]

@op3ntrap
Thanks for responding, since this problem also affects you would you mind clicking "this bug also affects me (top left). This will give the bug a higher priority.

Thanks

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "Modified service file" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Launchpad Janitor (janitor)]

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

[Edward (arkticpanda)]

Hi,
I also seem to have this problem:
Ubuntu 18.04
nvidia-prime 0.8.8

output of `journalctl -u nvidia-prime-boot.service`

```
-- Logs begin at Tue 2018-05-15 21:22:38 BST, end at Sun 2018-05-20 15:49:46 BST. --
May 16 20:50:32 erebus systemd[1]: Starting dGPU off during boot...
May 16 20:50:32 erebus sh[1273]: /bin/sh: 1: cannot create /sys/kernel/debug/vgaswitcheroo/switch: Directory nonexistent
May 16 20:50:32 erebus systemd[1]: nvidia-prime-boot.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
May 16 20:50:32 erebus systemd[1]: nvidia-prime-boot.service: Failed with result 'exit-code'.
May 16 20:50:32 erebus systemd[1]: Failed to start dGPU off during boot.

```

[Marco Corsi (marco999)]

Hi, any solution? Same problem with kernel 4.15.0-30-generic

[Dylan Borg (borgdylan)]

I get the same thing with kernel 4.18.x. The current implementation of the service fails on muxless optimus. Also if one turns off the GPU using /sys/bus/pci, GDM will still not boot up even if the prime boot service would succeed.

[Serhiy (xintx-ua)]

/etc/systemd/system/display-manager.service.wants/nvidia-prime-boot.service was just a symlink to /lib/systemd/system/nvidia-prime-boot.service and it's gone in the latest nvidia-prime package version, 0.8.8.1 that is in bionic-proposed.

[Manavjeet Singh (singhji31)]

The bug is fixed after Nvidia pushed an update on 08/10/2018.

[Vasyl (exposight)]

The service causing the issue was removed as part of the https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1778011 fix, released in 0.8.8.1 version.