Bluetooth on Ubuntu 18.04 and XPS13 completely gone (even after reboot)

Question

I have already had bluetooth problems, it disappeared after suspending and then I found a solution by updating to a newer kernel version. My mouse worked for several weeks... suddenly today out of NOTHING my bluetooth is completely gone! Even after reboot I can't get it back!

Does anybody has similar problems on 18.04 ? Maybe it has to do with some system updates from Canonical? Does anybody know what could help to get bluetooth back?

This is what the bluetooth menu shows me, everything is just greyed out:

PS: This is SO annoying! Is there a good place to report all these bugs to Canonical? Something like a Guthub issue tracker?

EDIT:

Here is the output of uname -r; lsusb; dmesg | egrep -i 'blue|firm':

4.18.8-041808-generic
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 2109:0100 VIA Labs, Inc. 
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 002: ID 0bda:58f4 Realtek Semiconductor Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[    0.032793] Spectre V2 : Enabling Restricted Speculation for firmware calls
[    5.068829] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[    6.368422] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[    9.312170] ath10k_pci 0000:02:00.0: firmware ver WLAN.RM.4.4.1-00079-QCARMSWPZ-1 api 6 features wowlan,ignore-otp crc32 fd869beb

Please edit the question to include results from terminal for uname -r; lsusb; dmesg | egrep -i 'blue|firm' — Jeremy31, Sep 22 '18 at 13:07
@Jeremy31 thanks for the feedback, I have edited the question — sunwarr10r, Sep 22 '18 at 13:23
Try removing the wifi card and put in back in. The bluetooth chipset isn't being found at all — Jeremy31, Sep 22 '18 at 13:31
Thx, I have the newest model 9370, but I will give it a try. But my WiFi works well, its only the bluetooth. I don't know if its one module — sunwarr10r, Sep 22 '18 at 15:00

score 2 · Accepted Answer · answered Sep 23 '18 at 12:34

2

My solution was:

Shutting down, waiting a few minutes and then turning on again worked for me.

No restart! Multiple restarts (about 10x) didn't help!

PS: If this still doesn't work, try to turn off the bluetooth-device inside bios, then restart and turn it on again.

answered Sep 23 '18 at 12:34

sunwarr10r

1,419

2

That did the trick for me. It was due to an a firmware update from Dell. When restarting, firmware upgrade is not applied. So you need to power off / power on. But be sure to plug-in power soure, otherwise firmware upgrade process will not start !!! – serfer2 Jun 01 '19 at 17:53

Bluetooth on Ubuntu 18.04 and XPS13 completely gone (even after reboot)

1 Answers1