XPS 13 9370 no bluetooth after suspend

Hi Fabian,

Im sorry to hear about your bluetooth issues? 

The best course of action is for you to use the link below to submit your issues.  By doing so, support can address your issue and track it in the system.

The following dynamic link takes you to our contact list and it should adjust based on support available in your region.  If it does not, you can select your region in the bottom right corner to update it.

http://www.dell.com/support/incidents-online/us/en/04/contactus/Dynamic

thanks,

Barton

i have the same on kernel 4.16.0-rc6-1.ga98eb00-default or 4.15.

did you have any luck with dell support?

I have the same issue on 4.15.0-12-generic. Mine appeared after the last XPS firmware update. I'm going to log a support ticket this morning.

Cheers

James

Okay! Fixed. Steps to resolve (for me)

1. Reboot to BIOS.

2. Go to Wireless tab.

3. Disable Bluetooth and Apply.

4. Re-enable Bluetooth and Apply.

5. Exit and boot.

Bluetooth back.

Same issue here with Ubuntu 18.04 / Linux 4.15.0-12-generic / BIOS 1.2.1.

Do use 16.04? I'm asking because Dell Support sugested trying 16.04 first.

I am also on 18.04 - I have another issue (touchpad hardware problem) and am waiting on a new unit so I rolled forward to 18.04 to have a look at the new Gnome. But it worked fine post-that upgrade. The only change I can see is I updated the BIOS last night when prompted.

For me it fixes itself after a few suspends (as well as a reboot). But the problem recurs.

I spoke too soon. :)

Problem re-appears periodically and requires a reboot to fix. Does anyone have a workaround for resetting Bluetooth WITHOUT a reboot? I have tried a bunch of things but it's like the device disappears. :(

Also rescanning the PCI devices with

# echo 1 > /sys/bus/pci/rescan

does not solve the problem

I have the same problem with my new 9370 device. It also happens during work without suspend. I need to reboot the machine an disable/enable bluetooth in BIOS. Please fix this asap or give us a good workaround.

Is everyone using TLP? 

systemctl status tlp
tlp.service - TLP system startup/shutdown
   Loaded: loaded (/lib/systemd/system/tlp.service; enabled; vendor preset: enab
   Active: active (exited) since Wed 2018-04-04 22:39:31 EDT; 11h ago
     Docs: http://linrunner.de/tlp
  Process: 19359 ExecStop=/usr/sbin/tlp init stop (code=exited, status=0/SUCCESS
  Process: 19444 ExecStart=/usr/sbin/tlp init start (code=exited, status=0/SUCCE
Main PID: 19444 (code=exited, status=0/SUCCESS)

Apr 04 22:39:31 james-XPS-13-9370 systemd[1]: Starting TLP system startup/shutdo
Apr 04 22:39:31 james-XPS-13-9370 tlp[19444]: Applying power save settings...don
Apr 04 22:39:31 james-XPS-13-9370 tlp[19444]: Setting battery charge thresholds.
Apr 04 22:39:31 james-XPS-13-9370 systemd[1]: Started TLP system startup/shutdo

I note that TLP seems to be auto-suspending BTUSB.

I have excluded Bluetooth from TLP's auto-suspend by editing `/etc/default/tlp`.

 Bluetooth devices are excluded from USB autosuspend:
#   0=do not exclude, 1=exclude.
USB_BLACKLIST_BTUSB=1 # changed to one  

And set this option to `1`. It seems to have resolved the issue from what I can see. I'll update if it doesn't.

Nope. It's not TLP. Same problem appeared. I am a loss I am afraid at this point.

I do have the same behaviour also sometimes with the wifi :-(

I also posted the issue her: https://askubuntu.com/questions/1024281/dell-xps-13-9370-bluetooth-issues

A workaround which works for me is shutdown and turn off the laptop, wait a few seconds, and turn it on again.

Directly rebooting does not work when I have this problem.