I had same trouble. I whent on terminal and run " sudo mumble " . Now the push to talk works .
So has to be some permision that mumbles needs to access some keyboard related. All that keyboard managmente might mess up things on 8.04 -- not push-to-talk - xevie problem https://bugs.launchpad.net/bugs/210905 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs