I got pointed here from: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1425252
As suggested also above I copied both these files from Windows' (Program Files\Common Files\QCA-Bluetooth) to Ubuntu's /lib/firmware/ar3k -folder: - AthrBT_0x11020100.dfu - ramps_0x11020100_40.dfu With these files in place the Bluetooth is working on both of these experimental kernels: (for more info see bug 1425252, link above) - 3.18.0-14-generic #15 SMP Fri Feb 27 18:38:10 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux - 4.0.0-040000rc1-generic #201502261652 SMP Thu Feb 26 16:56:29 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Bluetooth still does not work on published kernels: - 3.16.0-31-generic #41~lp1352821v1 SMP Fri Feb 20 20:52:34 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux OR - 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:06:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Now I'm also facing the same Bluetooth works / does-not-work after reboot issue. At least bluetooth mouse doesn't automatically reconnect after restart. Instead mouse text "flickers" in Bluetooth GUI screen. After clicking "ON" button (on bluetooth gui) for several times the bluetooth mouse might reconnect - or not. Also if I click "Connection ON" to mouse from underneath the Bluetooth icon on system tray it seems to try to get the connection establihed as the bluetooth icon's lock symbol goes ON and OFF repeatedly. System: Acer Aspire V3-371-79RJ and Ubuntu 14.10. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1394368 Title: Bluetooth with AR9462 doesn't work (New ID /Firmware) Status in linux-firmware package in Ubuntu: Incomplete Bug description: This is (kind of) a duplicate of: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1024884 (please read) I can't use Bluetooth with my AR9462 WLAN/BT-Combo. In the link above, it has been fixed, but not for my Adapter ID/Firmware: System: Ubuntu 14.10 utopic 64bit - 3.16.0-24-generic x86_64 lspci -nnk 02:00.0 Network controller [0280]: Qualcomm Atheros AR9462 Wireless Network Adapter [168c:0034] (rev 01) Subsystem: Lite-On Communications Inc Device [11ad:0802] Kernel driver in use: ath9k lsusb (identified Bluetooth Device) Bus 002 Device 003: ID 04ca:300d Lite-On Technology Corp. ath9k.conf options ath9k btcoex_enable=1 The "04ca:300d" ID is not in the Kernel, so i added it via dkms. I took ath3k.c and btusb.c out of the 3.16.0-24-generic source files and changed them: diff -urN ./linux-3.16.0/drivers/bluetooth/ath3k.c /usr/src/ar9462-1.5.1/ath3k.c --- ./linux-3.16.0/drivers/bluetooth/ath3k.c 2014-08-04 00:25:02.000000000 +0200 +++ /usr/src/ar9462-1.5.1/ath3k.c 2014-11-19 21:12:46.646265890 +0100 @@ -85,6 +85,7 @@ { USB_DEVICE(0x04CA, 0x3007) }, { USB_DEVICE(0x04CA, 0x3008) }, { USB_DEVICE(0x04CA, 0x300b) }, + { USB_DEVICE(0x04CA, 0x300d) }, { USB_DEVICE(0x0930, 0x0219) }, { USB_DEVICE(0x0930, 0x0220) }, { USB_DEVICE(0x0b05, 0x17d0) }, @@ -134,6 +135,7 @@ { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 }, + { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 }, diff -urN ./linux-3.16.0/drivers/bluetooth/btusb.c /usr/src/ar9462-1.5.1/btusb.c --- ./linux-3.16.0/drivers/bluetooth/btusb.c 2014-08-04 00:25:02.000000000 +0200 +++ /usr/src/ar9462-1.5.1/btusb.c 2014-11-19 21:12:46.646265890 +0100 @@ -157,6 +157,7 @@ { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 }, + { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 }, { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 }, sudo dkms add -m ar9462 -v 1.5.1 sudo dkms build -m ar9462 -v 1.5.1 sudo dkms install -m ar9462 -v 1.5.1 (DKMS package in the same style/versioning as in the bug report above) dkms status ar9462, 1.5.1, 3.16.0-24-generic, x86_64: installed Now the new output: dmesg | egrep 'ath3|ar3|Bluet' [ 2.787819] Bluetooth: Core ver 2.19 [ 2.787833] Bluetooth: HCI device and connection manager initialized [ 2.787839] Bluetooth: HCI socket layer initialized [ 2.787842] Bluetooth: L2CAP socket layer initialized [ 2.787848] Bluetooth: SCO socket layer initialized [ 2.793551] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 2.793554] Bluetooth: BNEP filters: protocol multicast [ 2.793561] Bluetooth: BNEP socket layer initialized [ 3.130779] Bluetooth: Patch file not found ar3k/AthrBT_0x11020100.dfu [ 3.130783] Bluetooth: Loading patch file failed [ 3.130788] ath3k: probe of 2-5:1.0 failed with error -12 [ 3.130823] usbcore: registered new interface driver ath3k [ 9.776503] Bluetooth: RFCOMM TTY layer initialized [ 9.776512] Bluetooth: RFCOMM socket layer initialized [ 9.776517] Bluetooth: RFCOMM ver 1.11 My patch works, but just like in the bug report above, a Firmware file is missing: AthrBT_0x11020100.dfu I found it neither in linux-firmware (http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/tree/ar3k) nor elsewhere. 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