Bluetooth broke KDE F41

latest KDE update broke Blutooth

Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Waiting for firmware download to complete
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Firmware loaded in 1891337 usecs
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Waiting for device to boot
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Device booted in 14613 usecs
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Malformed MSFT vendor event: 0x02
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-19-0-4.ddc
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Applying Intel DDC parameters completed
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: Firmware revision 0.4 build 132 week 3 2024
Oct 18 16:36:36 workstation kernel: Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its usage is not supported.
Oct 18 16:36:35 workstation kernel: Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Oct 18 16:36:35 workstation kernel: Bluetooth: BNEP filters: protocol multicast
Oct 18 16:36:35 workstation kernel: Bluetooth: BNEP socket layer initialized
Oct 18 16:36:35 workstation systemd[1]: Starting systemd-hostnamed.service - Hostname Service...
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support bap plugin
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support bass plugin
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support mcp plugin
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support vcp plugin
Oct 18 16:36:35 workstation bluetoothd[1582]: profiles/audio/micp.c:micp_init() D-Bus experimental not enabled
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support micp plugin
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support ccp plugin
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support csip plugin
Oct 18 16:36:35 workstation bluetoothd[1582]: src/plugin.c:init_plugin() System does not support asha plugin

I think I have the same problem. I have Fedora 41 with KDE.
I can’t get bluetooth to work in any way:

xxx@fedora:~$ hciconfig
hci0:   Type: Primary  Bus: USB
        BD Address: 00:00:00:00:00:00  ACL MTU: 0:0  SCO MTU: 0:0
        DOWN 
        RX bytes:6 acl:0 sco:0 events:1 errors:0
        TX bytes:3 acl:0 sco:0 commands:1 errors:0

xxx@fedora:~$ lsusb -t | grep Wireless
    |__ Port 005: Dev 004, If 0, Class=Wireless, Driver=btusb, 480M
    |__ Port 005: Dev 004, If 1, Class=Wireless, Driver=btusb, 480M
    |__ Port 005: Dev 004, If 2, Class=Wireless, Driver=[none], 480M

xxx@fedora:~$ systemctl status bluetooth
● bluetooth.service - Bluetooth service
     Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; preset: enabled)
    Drop-In: /usr/lib/systemd/system/service.d
             └─10-timeout-abort.conf
     Active: active (running) since Fri 2024-10-18 14:37:08 CEST; 17min ago
 Invocation: 57880aee87b34435a4d6f38b2a91618e
       Docs: man:bluetoothd(8)
   Main PID: 4917 (bluetoothd)
     Status: "Running"
      Tasks: 1 (limit: 37080)
     Memory: 580K (peak: 5.6M)
        CPU: 32ms
     CGroup: /system.slice/bluetooth.service
             └─4917 /usr/libexec/bluetooth/bluetoothd

Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support bap plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support bass plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support mcp plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support vcp plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: profiles/audio/micp.c:micp_init() D-Bus experimental not enabled
Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support micp plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support ccp plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support csip plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: src/plugin.c:init_plugin() System does not support asha plugin
Oct 18 14:37:08 fedora bluetoothd[4917]: Bluetooth management interface 1.23 initialized

Any way to get it to work? maybe downgrading KDE?

I tried to downgrade it with this instruction but nothing changed:

sudo dnf downgrade plasma-desktop plasma-workspace

Using Blueman instead of the default KDE applet solved the problem for me

Thanks but that didn’t help.
In the end mine is a hardware/driver problem. I found a thread with somebody with the same exact device and they created a patch to make it work that ideally should make it to Linux kernel 6.12:
https://bbs.archlinux.org/viewtopic.php?id=298853