Comment 22 for bug 1381856

Verification failed. It seems we need to fix this problem not only in notify-osd-icons but also in unity-settings-daemon.

The steps I performed verification as below:

I Installed 14.04.3 LTS to a lenovo laptop
enabled -trusty-proposed source from Software&Updates
run Software Updater to update all packges
run dpkg --list to check notify-osd-icons, this package is not updated
download the this package from https://launchpad.net/ubuntu/trusty/amd64/notify-osd-icons/0.8+14.04.20151016-0ubuntu1
manually install it
run dpkg --list to verify this package is installed
reboot
test microphone mute, the osd icon is still speaker rather than microphone.

So it looks like we need to upgrade the unity-setting-daemons for trusty as well.