I found out that it is caused by gnome settings in your home directory. So reinstalling ubuntu won't help to fix it. below command have solved the issue for me: gsettings set org.gnome.desktop.background show-desktop-icons true
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1276186 Title: System becomes unresponsive, ibus-ui-daemon takes ~150 % cpu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1276186/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs