turns out this was caused by apps being sigstopped when going to the background. The fix is to unregister/register telepathy observer in dialer-app when app comes in and out of focus. This fixes problem as telepathy was timing out trying to contact all of the registered observers and they weren't responding if sigstopped.
** Changed in: dialer-app Status: Confirmed => Fix Committed ** Changed in: dialer-app (Ubuntu) Status: New => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1208869 Title: [Dialer app] End call button is not responsive To manage notifications about this bug go to: https://bugs.launchpad.net/dialer-app/+bug/1208869/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs