I believe this is a problem that roots in unity, compiz and xorg working together. ANY application that continously updates the screen causes compiz AND xorg cpu usage to go up. Examples that trigger the problem include HTML5-animated-websites, moving around terminal windows with the mouse, the spectrum analyzer in audacious, and flash animations/videos.
On my machine (Thinkpad t430 with Intel i7 3520M and Intel HD 4000 graphics) the cpu usage in Precise was already much too high: After a fresh boot open two terminals, start top in the one and keep moving around the other one. Xorg and compiz together use 10-20% cpu. In Quantal the same experiment results in 20-40% cpu usage. For nothing but moving a small window around. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to chromium-browser in Ubuntu. https://bugs.launchpad.net/bugs/1064329 Title: High CPU load (above 50%) on Xorg process when browsing low graphic intensive sites Status in “chromium-browser” package in Ubuntu: Confirmed Status in “xorg-server” package in Ubuntu: Invalid Bug description: While using grooveshark.com, I noticed a big bump in the Xorg process CPU usage after selecting its tab. It jumps from the usual >5% to more than 50%. The webpage is not graphical intensive, but the interface is all HTML5. I'm attaching a video that shows the effect. Note that the recording also adds some weight to the Xorg process, but it's still noticeable, from 20% to 50%. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: chromium-browser 20.0.1132.47~r144678-0ubuntu6 ProcVersionSignature: Ubuntu 3.5.0-17.27-generic 3.5.5 Uname: Linux 3.5.0-17-generic x86_64 ApportVersion: 2.6.1-0ubuntu1 Architecture: amd64 Date: Tue Oct 9 19:26:08 2012 Desktop-Session: DESKTOP_SESSION = ubuntu XDG_CONFIG_DIRS = /etc/xdg/xdg-ubuntu:/etc/xdg XDG_DATA_DIRS = /usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/ EcryptfsInUse: Yes Env: MOZ_PLUGIN_PATH = None LD_LIBRARY_PATH = None InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) ProcEnviron: LANGUAGE=en_SG:en PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_SG.UTF-8 SHELL=/bin/bash SourcePackage: chromium-browser UpgradeStatus: Upgraded to quantal on 2012-05-15 (146 days ago) chromium-default: CHROMIUM_FLAGS="" gconf-keys: /desktop/gnome/applications/browser/exec = b'/usr/bin/chromium-browser\n'/desktop/gnome/url-handlers/https/command = b'/usr/bin/chromium-browser %s\n'/desktop/gnome/url-handlers/https/enabled = b'true\n'/desktop/gnome/url-handlers/http/command = b'/usr/bin/chromium-browser %s\n'/desktop/gnome/url-handlers/http/enabled = b'true\n'/desktop/gnome/session/required_components/windowmanager = b''/apps/metacity/general/compositing_manager = b''/desktop/gnome/interface/icon_theme = b'ubuntu-mono-dark\n'/desktop/gnome/interface/gtk_theme = b'Ambiance\n' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1064329/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
