[SOLVED] Bluetooth not Found after I removed some old kernels

[akanorm]

Hi,

I am Mint newbie using kernel 4.15.0-39, Mint 18.3 with Cinnamon 3.6.7 on my 64bit i7 Dell XPS 8930 desktop. My bluetooth was working before but recently it stopped working. The only thing that I can recall doing that might have effected this is that recently, I removed a whole bunch of the older kernels that were taking up room in my /boot directory.

I have installed linux-firmware_1.157.5_all firmware as the solution from Jeremy31, but that did not solve the issue. I followed directions from HERE.

I have also installed Blueman-applet to help manage the bluetooth. In Blueman, when I click "Devices", I get a blank screen, and if I click "Setup New Device", it says "No adapters found".

Results of /etc/init.d/bluetooth status and I got

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● bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2018-11-20 23:11:20 PST; 15h ago
     Docs: man:bluetoothd(8)
 Main PID: 2311 (bluetoothd)
   Status: "Running"
   CGroup: /system.slice/bluetooth.service
           └─2311 /usr/lib/bluetooth/bluetoothd

Nov 20 23:11:20 bears systemd[1]: Starting Bluetooth service...
Nov 20 23:11:20 bears bluetoothd[2311]: Bluetooth daemon 5.37
Nov 20 23:11:20 bears systemd[1]: Started Bluetooth service.
Nov 20 23:11:20 bears bluetoothd[2311]: Starting SDP server
Nov 20 23:11:20 bears bluetoothd[2311]: Bluetooth management interface 1.14 ...d
Hint: Some lines were ellipsized, use -l to show in full.

Results of # lsusb

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Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 007: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 002: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Results of # dmesg | egrep -i blue

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[    6.863365] Bluetooth: Core ver 2.22
[    6.863374] Bluetooth: HCI device and connection manager initialized
[    6.863376] Bluetooth: HCI socket layer initialized
[    6.863377] Bluetooth: L2CAP socket layer initialized
[    6.863380] Bluetooth: SCO socket layer initialized
[   26.474939] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   26.474940] Bluetooth: BNEP filters: protocol multicast
[   26.474942] Bluetooth: BNEP socket layer initialized

Results of #dmesg | egrep -i firm

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[    0.028000] Spectre V2 : Enabling Restricted Speculation for firmware calls
[    0.843466] DMAR: [Firmware Bug]: RMRR entry for device 02:00.0 is broken - applying workaround
[    2.668551] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_01.bin (v1.1)
[    7.441016] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/pre-cal-pci-0000:03:00.0.bin failed with error -2
[    7.441022] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/cal-pci-0000:03:00.0.bin failed with error -2
[    7.441274] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/QCA9377/hw1.0/firmware-6.bin failed with error -2
[    7.442999] ath10k_pci 0000:03:00.0: firmware ver WLAN.TF.1.0-00267-1 api 5 features ignore-otp crc32 79cea2c7

I hope all this means something to someone; for me, it's all greek!

Thanks in advance for your help,

[deepakdeshp]

Did you remove the previously working kernel? The easiest way would be to install the previous kernel and to boot to it.

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 uname -r

gives the kernel version.

[akanorm]

Hi Deepakdeshp,

I have removed about 10 previous kernels. My thinking was that the latest kernel would keep all the fixes from the previous kernels.

My response from the uname -r was
4.15.0-39-generic

What is the simplest method to add previous kernels? The the boot up procedure load all the previous kernels that are on the system or just the latest? If the latter, I had 4.15.39 was the latest when my bluetooth was working.

Thanks for helping me out.

[JeremyB]

I would check BIOS to see if Bluetooth got disabled. The bluetooth should show in lsusb results and there is no sign of it

[akanorm]

Thanks Jeremy,

I rebooted my system to check out the bios and did not find anything in the bios to turn on/off the bluetooth. However, when I restarted the system, the bluetooth logo was lit up in the panel and it started working.

Thanks for all that helped and happy holidays!