Public bug reported:
There's not much I can provide in terms of hard data, but maybe someone
can help with getting to the bottom of this. After installing Ubuntu
18.10, I'm unable to use graphics-intensive games.
My setup:
ASUS F556U, with Intel® Core™ i7-7500U CPU @ 2.70GHz × 4, Intel® HD Graphics
620 (Kaby Lake GT2) + NVIDIA GeForce 940MX.
While the Nvidia card is being used (Performance mode set in nvidia-
settings) and I run a 3d game with Steam (happens e.g. with Black Mesa,
Euro Truck Simulator 2...), everything works as expected, but after a
relatively short amount of time gnome-shell starts eating up more and
more CPU for some reason, effectively taking over the actual game. The
game starts to stutter first, then slowly grinds to a completely
unresponsive state. If I manage to quit the game, gnome-shell still does
its thing. I'm sometimes even unable to enter the overview mode in
Gnome. The only solution is to reboot.
This does happen with nvidia-driver-390 from the standard repo, but also
with nvidia-driver-410 from the graphics PPA. This was not the issue
with Ubuntu 18.04. It also does not happen with nouveau, or with the
Intel drivers (power saving mode in nvidia-settings). There's also
nothing of note in the syslog.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gnome-shell 3.30.1-2ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-12.13-generic 4.18.17
Uname: Linux 4.18.0-12-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Dec 6 07:26:04 2018
DisplayManager: gdm3
InstallationDate: Installed on 2018-12-05 (0 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=sk_SK.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug cosmic
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You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1807096
Title:
gnome-shell uses 100% cpu, triggered by games while using nvidia-
driver
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https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1807096/+subscriptions
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