Bluetooth suddenly stopped to work with 22.04 on Dell XPS 13 9310

[kalpana]

I've been using Ubuntu for more than one year without any problem. But now I'm facing two ! I was able to normally turn ON/OFF my bluetooth and to connect my computer to any device. But now, if the bluetooth parameter is still available, there is no way I can turn it ON. The switcher switcher, but does not turn orange and the bluetooth stays OFF.
I tried to boot on a flas drive with Ubuntu on it, the problem was the same : the bluetooth did not work (but I didn't face any sleep mode-wake up issue).
I do not understand, since my bluetooth used to work until now...
What can I do to get it back working ?
Thanks in advance for your help, nils This is what I tried without any good result : (My bluetooth device is ON in the BIOS menu)

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nils@nilsXPS13:~$ rfkill list
0: hci0: Bluetooth Soft blocked: no Hard blocked: no 1: phy0: Wireless LAN Soft blocked: no Hard blocked: no
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nils@nilsXPS13:~$ hcitool dev
Devices:

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nils@nilsXPS13:~$ hcitool inq
Inquiring ... Inquiry failed.: No such device
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nils@nilsXPS13:~$ sudo rfkill unblock bluetooth && rfkill list bluetooth
[sudo] Mot de passe de nils : 0: hci0: Bluetooth Soft blocked: no Hard blocked: no
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nils@nilsXPS13:~$ sudo hciconfig hci0 piscan
Can't set scan mode on hci0: Network is down (100)
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nils@nilsXPS13:~$ sudo service network-manager restart
Failed to restart network-manager.service: Unit network-manager.service not found.
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nils@nilsXPS13:~$ sudo systemctl restart systemd-networkd

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nils@nilsXPS13:~$ sudo reboot