Bug 1271839 may be related. I saw both the high CPU usage and extreme RAM usage (about 1 megabyte/second leak). It happened when I minimized Chrome, but continued long after I killed all the chrome processes. ibus-ui-gtk3 got up to 2+ gigabytes of ram pretty quickly.
Putting more details at bug 1271839. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ibus in Ubuntu. https://bugs.launchpad.net/bugs/1276186 Title: System becomes unresponsive, ibus-ui-daemon takes ~150 % cpu Status in ibus package in Ubuntu: Confirmed Bug description: As stated the graphical desktop became unresponsive. Dropping to CTRL + ALT + F1 terminal and `top`showed ibus-ui-daemon taking around 150 % cpu time and ibus-ui-gtk3 taking around 50 % cpu time. (names may contain minor errors) Tried to kill processes, rebooted. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: ibus 1.5.3-6ubuntu2.1 ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 Date: Tue Feb 4 16:41:03 2014 InstallationDate: Installed on 2013-09-10 (147 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MarkForUpload: True SourcePackage: ibus UpgradeStatus: Upgraded to saucy on 2013-10-23 (104 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1276186/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp