I disabled audio notification for incoming chats and it never hangs on chats - only on calls. So it seems that the reason for the lockups may be related to audio output.
-- BUG() report in getnstimeofday: soft lockup https://launchpad.net/bugs/53216 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
