When I suspend my machine and then I resume it, under both Ubuntu 21.10 and Pop!_OS 21.10, the bluetooth disappears, as shown in the following images:
It's like there is no bluetooth card in my pc. The only thing that fixes it is a restart.
Looking online this seems to be a common problem. I tried all the solutions I could find.
Some older post attributed the problem to an old buggy version of bluez, but on my machine I have the latest version:
gerardozinno@pop-os:~$ dpkg --status bluez | grep '^Version:'
Version: 5.60-0ubuntu2.1
I tried the solution suggested here https://askubuntu.com/questions/875901/no-bluetooth-found-plug-in-a-dongle-to-use-bluetooth:
gerardozinno@pop-os:~$ rfkill list all
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
but my output, as opposed to the one in the post, shows no bluetooth.
After I tried the following solution found here:
gerardozinno@pop-os:~$ hcitool dev
Devices:
gerardozinno@pop-os:~$ sudo systemctl restart bluetooth
gerardozinno@pop-os:~$ systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor pre>
Active: active (running) since Tue 2022-01-04 22:46:57 CET; 8min ago
Docs: man:bluetoothd(8)
Main PID: 40233 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 18336)
Memory: 544.0K
CPU: 16ms
CGroup: /system.slice/bluetooth.service
└─40233 /usr/lib/bluetooth/bluetoothd
gen 04 22:46:57 pop-os systemd[1]: bluetooth.service: Deactivated successfully.
gen 04 22:46:57 pop-os systemd[1]: Stopped Bluetooth service.
gen 04 22:46:57 pop-os systemd[1]: Starting Bluetooth service...
gen 04 22:46:57 pop-os bluetoothd[40233]: Bluetooth daemon 5.60
gen 04 22:46:57 pop-os systemd[1]: Started Bluetooth service.
gen 04 22:46:57 pop-os bluetoothd[40233]: Starting SDP server
gen 04 22:46:57 pop-os bluetoothd[40233]: Bluetooth management interface 1.21 i>
from the output it seems to me that the bluetooth should be active and running, so where is the problem?
I also tried asking first on AskUbuntu, but since they are less technical over there I'm asking here too. How can I fix this problem?
