It seems that you closed the hci device before the hci messages. Jul 9 00:45:20 Vdragon-PC1 bluetoothd[997]: Host is down (112) Jul 9 00:46:04 Vdragon-PC1 bluetoothd[997]: Unable to select SEP
And I see the following logs, are you making the pair or connection and reset the dongle on purpose? Jul 9 00:40:50 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been disabled Jul 9 00:40:54 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been enabled Jul 9 00:41:57 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been disabled Jul 9 00:42:02 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been enabled Jul 9 00:42:13 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been disabled Jul 9 00:42:17 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been enabled Jul 9 00:43:59 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been disabled Jul 9 00:44:03 Vdragon-PC1 bluetoothd[997]: Adapter /org/bluez/997/hci0 has been enabled -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1199059 Title: A2DP audio sink devices failed to work with "bluetoothd : Unable to select SEP" in system log. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1199059/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs