Ok, even the 4.4 kernel exhibits that behavior. Using the keyboard to switch off wireless activates BT adapter. In my case, even not activating it again, the wifi is on and both (BT and wifi) works as expected. Except I cannot receive files from my phone, only send (that is a separate issue, I think).
** Attachment added: "Indicators" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1618219/+attachment/4730848/+files/bt_wireless.png -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1618219 Title: Bluetooth driver module doesn't work Status in linux package in Ubuntu: Incomplete Bug description: Apparently the Ath9k module won't work with Ubuntu 16.04. Wireless is just ok. Qualcomm Atheros QCA9565 / AR9565 BT 4.0 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-34-generic 4.4.0-34.53 ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 Uname: Linux 4.4.0-34-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: danilo 3764 F.... pulseaudio /dev/snd/controlC0: danilo 3764 F.... pulseaudio CurrentDesktop: Unity Date: Mon Aug 29 18:28:56 2016 EcryptfsInUse: Yes MachineType: Acer Aspire E5-471 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic root=UUID=17c23581-58a2-4103-89c6-66eff0631645 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-34-generic N/A linux-backports-modules-4.4.0-34-generic N/A linux-firmware 1.157.3 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/15/2015 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V1.25 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: EA40_HB dmi.board.vendor: Acer dmi.board.version: Type2 - A01 Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.25:bd01/15/2015:svnAcer:pnAspireE5-471:pvrV3.72:rvnAcer:rnEA40_HB:rvrType2-A01BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: Aspire E5-471 dmi.product.version: V3.72 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1618219/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp