I also experienced this issue when using the composer in Geary 0.8.1 under 14.10 x64. Disabling IBus worked for me.
If someone ever gets assigned to this bug, feel free to contact me for help testing. -- You received this bug notification because you are a member of Ubuntu Touch seeded 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/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp