After running this command line, this is the output he displays.

themeak@debian:~$ systemctl start bluetooth
themeak@debian:~$ uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
Linux debian 5.10.0-22-amd64 #1 SMP Debian 5.10.178-3 (2023-04-22) x86_64 GNU/Linux
00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I218-LM [8086:155a] (rev 04)
DeviceName: Onboard LAN
Subsystem: Dell Ethernet Connection I218-LM [1028:05de]
Kernel driver in use: e1000e
Kernel modules: e1000e
--
02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev 73)
Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:4470]
Kernel driver in use: iwlwifi
Bus 001 Device 004: ID 0424:2514 Microchip Technology, Inc. (formerly SMSC) USB 2.0 Hub
Bus 001 Device 003: ID 0c45:64d0 Microdia Integrated Webcam
Bus 001 Device 002: ID 8087:8000 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 10c4:8108 Silicon Labs USB OPTICAL MOUSE
Bus 002 Device 006: ID 05c6:f000 Qualcomm, Inc. BE2013
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
dmesg: échec de lecture du tampon de noyau: Opération non permise
dmesg: échec de lecture du tampon de noyau: Opération non permise
bluetooth 757760 11 btrtl,btintel,btbcm,bnep,btusb
ecdh_generic 16384 1 bluetooth
libaes 16384 2 bluetooth,aesni_intel
rfkill 32768 10 bluetooth,dell_laptop,dell_rbtn,cfg80211
crc16 16384 2 bluetooth,ext4
themeak@debian:~$

themeak@debian:~$ systemctl status bluetooth.service
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor pre>
Active: inactive (dead)
Docs: man:bluetoothd(8)

Can you tell us what "doesn't work" on bluetooth?

From what you have posted, it looks like the software to operate your host controller is there. Normally you would need to pair a device before you do anything else. Have you tried to pair a device? If so, what happened?
Please be specific.

If you have a device paired, what else doesn't work?

yes, but I cannot connect the bluetooth to my device, which means I cannot access the Bluetooth settings, and I cannot diagnose the problem.

[OFF-TOPIC(we hope:)]By Debian 11 do you mean Kali? In which case Bluetooth is probably for the big girls n boys?
[/OFF-TOPIC()]

Did you install a desktop and default to Gnome?
Example searches: bluetooth settings in Gnome, or Debian Gnome documentation on bluetooth

1 members found this post helpful.

yes

Kali is not Debian 11!

Kali is a rolling distro that uses Debian Testing repos.

It is also an advanced distro aimed at professional pen testers and security auditors.

Since you're not one, you should switch to a different distro that doesn't deliberately disable Bluetooth.

I forget if bluetooth was on with KDE or Gnome by default but my netinst with Xfce needed setup: Xfce enable bluetooth