I also had this problem since upgrading to raring. Removing libcanberra-gtk-module seems to fix it .
http://www.kubuntuforums.net/showthread.php?61492-GTK-apps-freeze-if- non-root-in-kubuntu- raring&s=0e5d9bbf40c525c061724e92e5659163&p=319050#post319050 ** Changed in: gtk+2.0 (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gtk+2.0 in Ubuntu. https://bugs.launchpad.net/bugs/666921 Title: (Kubuntu) GTK app freeze when some GUI feature is used Status in “gtk+2.0” package in Ubuntu: Confirmed Bug description: Hi, here is my first bug report here: Every GTK application on my Kubuntu 10.10 (x64) successfully upgraded from 10.04 (2 days ago, before everything ok) freezes when I try to use some GUI feature -- checkbox (when "checking" not unchecking), radio buttons when changing radio, and in gtk "filebrowser" dialog when changing the directory. libgtk2.2-0 (2.22.0-0ubuntu1) KDE 4.51 One core of CPU goes to 100% imidiately. Occurs in Pidgin, Gimp, Eclipse, wicd, wireshark No problem in Qt apps. Everything fine if I start this apps as root! Problem appeared after upgrade. ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: libgtk2.0-0 2.22.0-0ubuntu1 ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4 Uname: Linux 2.6.35-22-generic x86_64 NonfreeKernelModules: fglrx Architecture: amd64 Date: Tue Oct 26 21:15:11 2010 InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427) ProcEnviron: LANGUAGE=cs_CZ PATH=(custom, user) LANG=cs_CZ.utf8 SHELL=/bin/bash SourcePackage: gtk+2.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/666921/+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
