New uefi didn't help. Today bluetooth dissappeared once more.
Need to mention that p.1 helps a lot, bluetooth missing occurs very occassionnally, but still missing
I am considering to do the same. The Huawei MateBook X Pro looks like a good replacement with a decent network / bluetooth adapter (Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter).
Unfortunately this hit me today on Ubuntu 18..04 , rebooting didn't help, Wifi and Bluetooth were gone, since they (as far as I remember) are on the same chip / wireless card they fail then.
Powering off the device and starting it up worked for me.
Anyway, power cycling should not be the solution, and at this price point something this essential should work flawlessly, I mean...yeah RJ45...but...
Dell, please fix this! I had 2 replacement devices and was months without a device I bought...not again....
Brand new Dev machine (9370), latest firmware, 18.04 up to date, same issue you all are facing. BT disappears every 2 out of 3 suspends. A reboot or additional suspends fixes it.
I opened a new support ticket to check on any progress in a permanent fix.
Try to update ath10k firmware (from kvalo) also. Bt and ath10 are somehow interdependent.
I have latest updates for both firmwares and it seems the issue has been resolved (4 days of healthy sleep with correct awakening). But there is still a chance that the issue will appear in future though.
... that didn't help for my bluetooth issue (no bluetooth device found - ubuntu 18.10). a few reboots did fix it for now. for those that do want to update their ath10k firmware and maybe have better luck than I did:
dmesg | grep ath10k
ath10k_pci 0000:02:00.0: firmware ver WLAN.RM.4.4.1-00132-QCARMSWP-1 api 6