I found the problem. Your system only has one GPU (GeForce 9600) which
it needs the 'nouveau' driver to use. But you have disabled the
'nouveau' driver in your kernel command line:
nouveau.modeset=0
and so gnome-shell is using software rendering, hence high CPU. So this
is not a bug.
Please remove that option from your kernel command line
(/etc/default/grub) then run:
sudo update-grub
and reboot.
Separately, I suggest you will get much better performance using the
proprietary Nvidia driver. It seems your GPU requires Nvidia driver
version 340. To install that please open the 'Additional Drivers' app.
** Changed in: gnome-shell (Ubuntu)
Status: Incomplete => Invalid
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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1889377
Title:
gnome-shell using lot of CPU (costantly 30% - often up to 100%) making
my system quite slow
Status in gnome-shell package in Ubuntu:
Invalid
Bug description:
I've read it might be an issue related to NVidia running on noveaux drivers.
Actually this is my configuration (NVidia G92 [GeForce 9600 GSO]) with
noveaux because if I install proprietary NVidia drivers, I cannot boot (system
freezes on purple screen at boot before asking for login) even with all the
proper configurations(nomodeset on grub, WaylandEnable=false in
/etc/gdm3/custom.conf)
1) Ubuntu release: Ubuntu 20.04.1 LTS
2) apt-cache policy gnome-shell
gnome-shell:
Installed: 3.36.3-1ubuntu1~20.04.2
Candidate: 3.36.3-1ubuntu1~20.04.2
Version table:
*** 3.36.3-1ubuntu1~20.04.2 500
500 http://it.archive.ubuntu.com/ubuntu focal-updates/main amd64
Packages
100 /var/lib/dpkg/status
3.36.1-5ubuntu1 500
500 http://it.archive.ubuntu.com/ubuntu focal/main amd64 Packages
3) System running quick
4) System very slow
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.3-1ubuntu1~20.04.2
Uname: Linux 5.7.10-050710-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Jul 29 10:31:30 2020
DisplayManager: gdm3
GsettingsChanges:
InstallationDate: Installed on 2020-07-16 (12 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
RelatedPackageVersions: mutter-common 3.36.3-0ubuntu0.20.04.1
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
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