gnome-control-center / Ubuntu settings takes 1 minute+ 100% CPU first time loading

[Tom]

First time starting gnome-control-center after login, it takes ~70seconds to load and 100%CPU. Only first time starting I get "nvc0_screen_create:906 - Error allocating PGRAPH context for M2MF: -16".

In terminal "top" shows "gst-plugin-scan" is the offender. I installed two extensions initially but now all are switched off with same effect.

Second and other times starting, all is normal

Dell XPS 15, BIOS v1.9, Ubuntu 18.04LTS, *clean* install all default, just had to start nvidia to be able to login at all first time.

[Tom (tom-lorinthe)]

Might this have to do with nvidia driver 390 on optimus laptops? If I "sudo prime-select nvidia" the problem does not occur. But with "prime-select intel" it has...

[Wouter van Os (wouter0100)]

Also having this issue on my Acer aspire v3-772g with clean install on 18.04, although - no nvidia driver(s) installed. Really a clean install.

I tried installing the nvidia driver, but then I came across a different issue, which seems to be related to bug #1752053.

[Launchpad Janitor (janitor)]

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

[Wouter van Os (wouter0100)]

An additional note is that this also seems to occur when I unlock my notebook and the settings is not yet open (but I used it before locking it).

[Tom (tom-lorinthe)]

@Wouter Last one is excellent find: I also noticed that sometimes my suspend leads to complete laptop freeze and force power off is necessary. Now you made realize it has to to with gnome-settings: I can only use suspend if I did not start gnome-settings before, even though it is not running when I try to suspend.

Note to myself: never use suspend after you used gnome-settings

[Wouter van Os (wouter0100)]

@Tom didn't realize that - I'm having the exact same issues that sometimes a reboot is required after suspend (which I use heavily).. Didn't connect that with gnome-settings yet.

[Tom (tom-lorinthe)]

For some reason, the issue does not longer exist with me. It might has to do with my /etc/default/grub where I have now GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modeset=1 nouveau.modeset=0 nouveau.runpm=0"