I have nearly the same problem also with the sound-indicator. On my device, it is sometimes not there after boot. (I mean not the first boot, it is sometimes after some boot.) I am on Ubuntu 15.04 r117 on mako (Nexus 4)
This is a link to the other bug-report: https://bugs.launchpad.net/ubuntu/+source/indicator-sound/+bug/1421943 Maybe it could help
I have nearly the same problem also with the sound-indicator. On my device, it is sometimes not there after boot. (I mean not the first boot, it is sometimes after some boot.) I am on Ubuntu 15.04 r117 on mako (Nexus 4)
This is a link to the other bug-report: /bugs.launchpad .net/ubuntu/ +source/ indicator- sound/+ bug/1421943
https:/
Maybe it could help