I can reproduce this fairly reliably (~50%) if my phone hasn't been used in a while. Enough that I've caught a video of it doing it. media- hub.log attached.
If I unlock the phone and go into the sound settings (from the sound indicator), then turn the screen off, then the phone reliably doesn't fail a second time. I believe there's some race associated with slow I/O. Perhaps it happens if relevant code paths need to be swapped in on an incoming call? I also believe this is a regression in the last or previous OTA. Please ping me on IRC (rbasak) if I can help further with debugging this. ** Attachment added: "media-hub.log" https://bugs.launchpad.net/ubuntu/+source/ofono/+bug/1612367/+attachment/4778735/+files/media-hub.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1612367 Title: [Touch] Incoming call gets silent randomly To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1612367/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs