It seems the problem for me is the action of 'turn off' bluetooth. I dual boot with Windows 10. If I chose to 'reboot' (not shutdown) from windows and boot into ubuntu, bluetooth will start properly and working fine. The moment I turned off bluetooth it stop working, even reboot again.
I past below the output for command `dmesg|grep -i blue` under the situations of working and not working. >From the dmesg output, it seems different firmware is being loaded for the two cases (revision 0.1 works while revision 0.0 not work). I suspect that the bluetooth daemon modify some of the hardware file when it is turned off. The same for windows 10, I guess it also modifies some hardware file on restart. ================= WORKING CASE =================== [ 3.393285] Bluetooth: Core ver 2.21 [ 3.393293] Bluetooth: HCI device and connection manager initialized [ 3.393295] Bluetooth: HCI socket layer initialized [ 3.393296] Bluetooth: L2CAP socket layer initialized [ 3.393300] Bluetooth: SCO socket layer initialized [ 3.403438] Bluetooth: HCI UART driver ver 2.3 [ 3.403439] Bluetooth: HCI UART protocol H4 registered [ 3.403439] Bluetooth: HCI UART protocol BCSP registered [ 3.403440] Bluetooth: HCI UART protocol LL registered [ 3.403440] Bluetooth: HCI UART protocol ATH3K registered [ 3.403441] Bluetooth: HCI UART protocol Three-wire (H5) registered [ 3.403491] Bluetooth: HCI UART protocol Intel registered [ 3.403504] Bluetooth: HCI UART protocol BCM registered [ 3.403504] Bluetooth: HCI UART protocol QCA registered [ 3.403505] Bluetooth: HCI UART protocol AG6XX registered [ 3.478393] Bluetooth: hci0: Firmware revision 0.1 build 68 week 27 2016 [ 4.884372] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked [ 5.560960] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 5.560961] Bluetooth: BNEP filters: protocol multicast [ 5.560963] Bluetooth: BNEP socket layer initialized [ 10.825093] Bluetooth: RFCOMM TTY layer initialized [ 10.825097] Bluetooth: RFCOMM socket layer initialized [ 10.825101] Bluetooth: RFCOMM ver 1.11 ================= END OF WORKING CASE =================== ================== NOT WORKING CASE ===================== [ 3.536266] Bluetooth: Core ver 2.21 [ 3.536275] Bluetooth: HCI device and connection manager initialized [ 3.536276] Bluetooth: HCI socket layer initialized [ 3.536278] Bluetooth: L2CAP socket layer initialized [ 3.536281] Bluetooth: SCO socket layer initialized [ 3.546498] Bluetooth: HCI UART driver ver 2.3 [ 3.546499] Bluetooth: HCI UART protocol H4 registered [ 3.546500] Bluetooth: HCI UART protocol BCSP registered [ 3.546500] Bluetooth: HCI UART protocol LL registered [ 3.546501] Bluetooth: HCI UART protocol ATH3K registered [ 3.546501] Bluetooth: HCI UART protocol Three-wire (H5) registered [ 3.546532] Bluetooth: HCI UART protocol Intel registered [ 3.546544] Bluetooth: HCI UART protocol BCM registered [ 3.546545] Bluetooth: HCI UART protocol QCA registered [ 3.546545] Bluetooth: HCI UART protocol AG6XX registered [ 3.632162] Bluetooth: hci0: Bootloader revision 0.0 build 26 week 38 2015 [ 3.633833] Bluetooth: hci0: Device revision is 16 [ 3.633834] Bluetooth: hci0: Secure boot is enabled [ 3.633835] Bluetooth: hci0: OTP lock is enabled [ 3.633835] Bluetooth: hci0: API lock is enabled [ 3.633836] Bluetooth: hci0: Debug lock is disabled [ 3.633836] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 3.633984] bluetooth hci0: Direct firmware load for intel/ibt-12-16.sfi failed with error -2 [ 3.633985] Bluetooth: hci0: Failed to load Intel firmware file (-2) [ 3.774670] Bluetooth: hci0: Bootloader revision 0.0 build 26 week 38 2015 [ 3.777812] Bluetooth: hci0: Device revision is 16 [ 3.777813] Bluetooth: hci0: Secure boot is enabled [ 3.777814] Bluetooth: hci0: OTP lock is enabled [ 3.777814] Bluetooth: hci0: API lock is enabled [ 3.777814] Bluetooth: hci0: Debug lock is disabled [ 3.777815] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 3.777913] bluetooth hci0: Direct firmware load for intel/ibt-12-16.sfi failed with error -2 [ 3.777915] Bluetooth: hci0: Failed to load Intel firmware file (-2) [ 4.760374] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked [ 5.455861] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 5.455866] Bluetooth: BNEP filters: protocol multicast [ 5.455889] Bluetooth: BNEP socket layer initialized ================= END OF NOT WORKING CASE =================== -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1561474 Title: Bluetooth will be disable after resume from suspend on Xenial To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1561474/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
