gnome-shell causes high CPU load with dual monitors on a Core2 Duo E6850

[Klaus]

I have ubuntu 17.10 with Xorg Gnome desktop, intel i915 driver and two monitors attached.
gnome-shell causes a very high CPU load which seems to make the system unusable sluggish.
When moving a window the CPU usage of gnome-shell raises to over 90 %.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.2-0ubuntu0.1
ProcVersionSignature: Ubuntu 4.13.0-37.42-generic 4.13.13
Uname: Linux 4.13.0-37-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 16 21:30:31 2018
DisplayManager: gdm3
GsettingsChanges:
 b'org.gnome.shell' b'favorite-apps' b"['org.gnome.Nautilus.desktop', 'firefox.desktop', 'libreoffice-writer.desktop', 'libreoffice-calc.desktop', 'libreoffice-impress.desktop', 'org.gnome.Software.desktop', 'gnome-control-center.desktop', 'thunderbird.desktop', 'jameica_2_6_6.desktop', 'org.gnome.Calculator.desktop']"
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
InstallationDate: Installed on 2017-08-18 (210 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to artful on 2017-11-05 (131 days ago)

[Daniel van Vugt (vanvugt)]

I know gnome-shell's CPU requirements are way too high right now. In reproducing and fixing this bug I think it's helpful to developers in noting what model CPU is affected.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 17.10 (artful) reached end-of-life on July 19, 2018.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.

[Launchpad Janitor (janitor)]

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

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