Solved. It's necessary activate system sounds in "Sound" menu.
IMHO this behavior is wrong but...
** Changed in: thunderbird (Ubuntu)
Status: New => Opinion
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1009108
Title:
No sound in Thunderbird
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1009108/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
