Just a note that I am seeing this problem as well, here on an AMD 8350 8-core system using Trusty 14.04 AMD64. The Xorg process takes about 20%-35% of one core, when the system is otherwise idle. I'm open to suggestions regarding how I can dig deeper to determine the cause, because obviously killing the Xorg process isn't an option (or I wouldn't be running it in the first place). As an experiment, to see if it would help to restart X, I did try killing the process then logging back in with the new Xorg process, but the CPU usage was the same as it was before.
Any suggestions are welcome, and I am willing to help debug this. Thanks, Brian -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1309919 Title: Xorg causing 100% cpu load Status in “xorg” package in Ubuntu: Confirmed Bug description: EDIT3: I'll withdraw this bug report. Primary problem here was the combination of "xfce-compositor" with an slow graphics card (mga). Disabling the "compositor" setting in xfce did it for me. Disabling showing window content on resize+move makes things faster on this graphics card, too. EDIT2: it seems that even the cpu graph in the top bar produces enough load to get Xorg with Matrox G450 (PCI) busy. Without cpu graph responsiveness is still far slower than with 13.10. EDIT: after deleting almost every file+directory which starts with "." in my home directory, this problem has vanished, but overall performance seems slower than with 13.10. Kind regards, Jochen Dear reader, after upgrading from 13.10 to 14.04 (xubuntu, amd64), Xorg uses 100%, overall reaction is slow and mouse pointer is flickering. Attachment contains an strace of approx. 5 seconds ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CurrentDesktop: XFCE Date: Sat Apr 19 12:46:25 2014 InstallationDate: Installed on 2012-09-28 (567 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to trusty on 2014-04-19 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1309919/+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
