Bluetooth adapter vanised.

[Kelean]

I was being sarcastic and my wife was trying to be funny. The bluetooth is built in and not a dongle.

[die.boer]

Please clarify this statement.

i think he was being funny , if that was the case (plugging it in)he wouldn't still be here trying to solve it ?

[die.boer]

its built in from what it looks like
01:00.0 Network controller:
Realtek RTL8821CE 802.11ac PCIe Wireless Network Adapter
[10ec:c821]
Subsystem: Lenovo
The RTL8821CE is a combo Wi-Fi/Bluetooth card. The Wi-Fi portion connects to the system over PCIe, while the Bluetooth portion normally appears to Linux as an internal USB device.

PS: it might even be a hardware fault , maybe the card is not seated properly? He'll have to open up the case to check that

[Snowhog]

This is a desktop.

I can't see if this was asked; and maybe not relevant; but is the Bluetooth built into the PC, or are you using a Bluetooth dongle (device plugged into a USB port)?

[Snowhog]

ps. My wife has fixed the the problem she said I just need to plug them in.

Please clarify this statement.

[die.boer]

hmm ok ...there is still no Bluetooth USB device for the driver to bind to.
so far we've seen
-bluetooth subsystem loads.
-btusb loads.
-btrtl loads.
-RTL8821C firmware is installed.
-lsusb sees no Bluetooth device.
-bluetoothctl sees no controller.
-Older kernels have the same problem.
-A complete power drain didn't restore it.
-The RTL8821CE is generating repeated PCIe physical-layer RxErr messages.

only thing to try now is boot a Kubuntu 26.04 Live USB and select Try Kubuntu.
then just run

lsusb

and

bluetoothctl list

If Bluetooth is also absent in the live session, we've effectively ruled out the installed Kubuntu system and its configuration.
If Bluetooth appears in the live session, then we know the hardware is okay and we can go back to investigating the installed system.

[Kelean]

kelean@kevin-90hv0003us:~$ sudo modprobe btrtl
[sudo: authenticate] Password:
kelean@kevin-90hv0003us:~$ lsmod | grep -E 'btusb|btrtl'
btrtl 36864 0
bluetooth 1134592 10 btrtl,bnep
kelean@kevin-90hv0003us:~$ bluetoothctl list
kelean@kevin-90hv0003us:~$

[die.boer]

last 3 commands to run please and post output

sudo modprobe btrtl

lsmod | grep -E 'btusb|btrtl'

bluetoothctl list

[Kelean]

kelean@kevin-90hv0003us:~$ lsusb -t
/: Bus 001.port 001: Dev 001, class=root_hub, driver=xhci_hcd/16p, 480m
|__ port 006: Dev 002, if 0, class=human interface device, driver=usbhid, 1.5m
|__ port 007: Dev 003, if 0, class=human interface device, driver=usbhid, 1.5m
|__ port 007: Dev 003, if 1, class=human interface device, driver=usbhid, 1.5m
|__ port 009: Dev 004, if 0, class=vendor specific class, driver=rtsx_usb, 480m
/: Bus 002.port 001: Dev 001, class=root_hub, driver=xhci_hcd/6p, 10000m
kelean@kevin-90hv0003us:~$ sudo dmesg | grep -ei 'usb|xhci|rtl|8821|bluetooth|btusb' | tail -150
[sudo: Authenticate] password:
[33619.475278] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33619.475281] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33619.475283] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33619.550639] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33619.550653] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33619.550656] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33619.619749] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33619.619752] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33619.619754] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33619.879978] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33619.879980] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33619.879983] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33619.893153] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33619.893156] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33619.893158] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33619.958414] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33619.958416] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33619.958419] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33620.064011] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33620.064013] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33620.064016] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33620.505930] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33620.505933] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33620.505935] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33666.759850] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33666.759852] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33666.759855] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33738.957690] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33738.957692] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33738.957695] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33738.978044] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33738.978046] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33738.978048] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33739.385192] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33739.385194] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33739.385197] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33739.668311] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33739.668313] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33739.668316] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33739.675035] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33739.675038] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33739.675040] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33739.905370] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33739.905372] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33739.905375] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33740.009223] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33740.009226] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33740.009228] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33740.772286] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33740.772288] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33740.772291] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33740.795061] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33740.795063] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33740.795066] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33741.520490] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33741.520492] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33741.520495] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.388448] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.388450] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.388453] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.393285] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.393287] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.393290] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.429021] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.429024] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.429026] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.562843] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.562846] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.562848] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.594288] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.594299] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.594302] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.780005] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.780007] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.780010] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.824153] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.824155] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.824158] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.878073] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.878075] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.878077] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33859.907795] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33859.907797] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33859.907800] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33860.529027] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33860.529030] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33860.529032] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33956.743060] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33956.743063] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33956.743065] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33978.972166] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33978.972168] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33978.972171] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33978.980228] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33978.980231] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33978.980233] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33978.983618] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33978.983621] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33978.983623] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33979.417591] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33979.417593] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33979.417596] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33979.441134] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33979.441136] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33979.441138] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33979.582804] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33979.582807] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33979.582809] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33979.622818] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33979.622821] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33979.622823] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33979.644896] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33979.644898] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33979.644901] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33979.952668] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33979.952670] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33979.952673] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[33980.033274] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[33980.033276] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[33980.033279] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.376134] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.376136] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.376139] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.405401] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.405403] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.405406] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.426612] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.426615] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.426617] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.451638] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.451640] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.451642] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.482379] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.482381] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.482384] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.590091] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.590093] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.590096] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.591291] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.591293] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.591295] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.669426] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.669428] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.669431] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.675125] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.675128] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.675130] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
[34100.697611] rtw88_8821ce 0000:01:00.0: Pcie bus error: Severity=correctable, type=physical layer, (receiver id)
[34100.697613] rtw88_8821ce 0000:01:00.0: Device [10ec:c821] error status/mask=00000001/0000e000
[34100.697616] rtw88_8821ce 0000:01:00.0: [ 0] rxerr (first)
kelean@kevin-90hv0003us:~$ apt policy linux-firmware
linux-firmware:
installed: 20260319.git217ca6e4.1ubuntu
candidate: 20260319.git217ca6e4.1ubuntu
version table:
*** 20260319.git217ca6e4.1ubuntu 500
500 http://us.archive.ubuntu.com/ubuntu resolute/main amd64 packages
500 http://us.archive.ubuntu.com/ubuntu resolute/main i386 packages
100 /var/lib/dpkg/status
kelean@kevin-90hv0003us:~$ dpkg -l | grep linux-firmware
ii linux-firmware 20260319.git217ca6e4.1ubuntu all firmware for linux kernel drivers (metapackage
)
ii linux-firmware-amd-graphics 20260319.git217ca6e4-0ubuntu3.1 all firmware for amd/ati graphics
ii linux-firmware-amd-misc 20260319.git217ca6e4-0ubuntu1.1 all firmware for amd npu accelerators
ii linux-firmware-broadcom-wireless 20260319.git217ca6e4-0ubuntu1.1 all firmware for broadcom and cypress wi-fi and bl
uetooth adapters
ii linux-firmware-intel-graphics 20260319.git217ca6e4-0ubuntu2.1 all firmware for intel graphics and ipu and vsc pr
ocessors
ii linux-firmware-intel-misc 20260319.git217ca6e4-0ubuntu1.2 all firmware for miscellaneous intel devices and a
dapters
ii linux-firmware-intel-wireless 20260319.git217ca6e4-0ubuntu2.1 all firmware for intel wi-fi and bluetooth adapter
s
ii linux-firmware-marvell-prestera 20260319.git217ca6e4-0ubuntu1.2 all firmware for marvell prestera asic devices
ii linux-firmware-marvell-wireless 20260319.git217ca6e4-0ubuntu1.1 all firmware for marvell and nxp wi-fi adapters
ii linux-firmware-mediatek 20260319.git217ca6e4-0ubuntu1.2 all firmware for mediatek wi-fi, bluetooth, and et
hernet adapters and socs
ii linux-firmware-mellanox-spectrum 20260319.git217ca6e4-0ubuntu1.1 all firmware for mellanox spectrum switches
ii linux-firmware-misc 20260319.git217ca6e4-0ubuntu2.2 all firmware for miscellaneous devices and adapter
s
ii linux-firmware-netronome 20260319.git217ca6e4-0ubuntu1.1 all firmware for netronome ethernet adapters
ii linux-firmware-nvidia-graphics 20260319.git217ca6e4-0ubuntu1.1 all firmware for nvidia graphics
ii linux-firmware-qlogic 20260319.git217ca6e4-0ubuntu1.1 all firmware for qlogic scsi, fc, and ib host bus
and ethernet adapters
ii linux-firmware-qualcomm-graphics 20260319.git217ca6e4-0ubuntu1.1 all firmware for qualcomm graphics and video proce
ssors
ii linux-firmware-qualcomm-misc 20260319.git217ca6e4-0ubuntu2.1 all firmware for miscellaneous qualcomm devices
ii linux-firmware-qualcomm-wireless 20260319.git217ca6e4-0ubuntu1.2 all firmware for qualcomm and atheros wi-fi and bl
uetooth adapters
ii linux-firmware-realtek 20260319.git217ca6e4-0ubuntu1.2 all firmware for realtek wi-fi, bluetooth, etherne
t and audio adapters
kelean@kevin-90hv0003us:~$ find /usr/lib/firmware/ -iname '*rtl8821*' -o -iname '*rtl_bt*'
/usr/lib/firmware/rtl_bt
/usr/lib/firmware/rtl_bt/rtl8821cs_config.bin.zst
/usr/lib/firmware/rtl_bt/rtl8821cs_fw.bin.zst
/usr/lib/firmware/rtl_bt/rtl8821a_fw.bin.zst
/usr/lib/firmware/rtl_bt/rtl8821a_config.bin.zst
/usr/lib/firmware/rtl_bt/rtl8821c_config.bin.zst
/usr/lib/firmware/rtl_bt/rtl8821c_fw.bin.zst
/usr/lib/firmware/rtlwifi/rtl8821aefw_wowlan.bin.zst
/usr/lib/firmware/rtlwifi/rtl8821aefw.bin.zst
/usr/lib/firmware/rtlwifi/rtl8821aefw_29.bin.zst

[die.boer]

ok ... output of these please :

lsusb -t

sudo dmesg | grep -Ei 'usb|xhci|rtl|8821|bluetooth|btusb' | tail -150

apt policy linux-firmware

dpkg -l | grep linux-firmware

find /usr/lib/firmware/ -iname '*rtl8821*' -o -iname '*rtl_bt*'

[Kelean]

kelean@kevin-90hv0003us:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 17ef:608d Lenovo Optical Mouse
Bus 001 Device 003: ID 0c45:7663 Microdia USB Keyboard
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
kelean@kevin-90hv0003us:~$ bluetoothctl list


still no joy after doing the complete shutdown like you said in your post.

[die.boer]

can you maybe try a complete power drain , like this :

-Don't simply reboot.
-Shut Kubuntu down completely.
-Once the machine is off, switch the PC's power supply off (or unplug it).
-Hold the PC's power button down for about 15–20 seconds.
-Leave it without power for a minute.
-Restore power.
-Boot Kubuntu.

then immediately run:

lsusb

and

bluetoothctl list

post output here

[Snowhog]

Enclose the output in either [QUOTE] [/QUOTE] or [CODE] [/CODE] tags.

[Kelean]

What tags do I use to make a shorter entry

[Kelean]

elean@kevin-90hv0003us:~$ sudo modprobe btusb
kelean@kevin-90hv0003us:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 17ef:608d Lenovo Optical Mouse
Bus 001 Device 003: ID 0c45:7663 Microdia USB Keyboard
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
kelean@kevin-90hv0003us:~$ lsusb -t
lsusb: invalid option -- '�'
lsusb: invalid option -- '�'
lsusb: invalid option -- '�'
Usage: lsusb [options]...
List USB devices
-v, --verbose
Increase verbosity (show descriptors)
-s [[bus]:][devnum]
Show only devices with specified device and/or
bus numbers (in decimal)
-d vendor:[product]
Show only devices with the specified vendor and
product ID numbers (in hexadecimal)
-D device
Selects which device lsusb will examine
-t, --tree
Dump the physical USB device hierarchy as a tree
-V, --version
Show version of program
-h, --help
Show usage and he

kelean@kevin-90hv0003us:~$ sudo dmesg | grep -Ei 'usb|8821|rtl|bluetooth|btusb|firmware' | tail -100
[ 4284.159088] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4284.159091] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4284.159093] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4284.162003] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4284.162005] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4284.162007] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4284.212774] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4284.212777] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4284.212779] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4284.322157] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4284.322160] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4284.322162] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4284.354592] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4284.354595] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4284.354597] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4284.368339] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4284.368341] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4284.368350] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4300.344525] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4300.344527] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4300.344529] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4321.400558] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4321.400560] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4321.400563] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4362.938801] Bluetooth: Core ver 2.22
[ 4362.938837] NET: Registered PF_BLUETOOTH protocol family
[ 4362.938839] Bluetooth: HCI device and connection manager initialized
[ 4362.938843] Bluetooth: HCI socket layer initialized
[ 4362.938845] Bluetooth: L2CAP socket layer initialized
[ 4362.938848] Bluetooth: SCO socket layer initialized
[ 4362.963629] usbcore: registered new interface driver btusb
[ 4378.773538] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 4378.773542] Bluetooth: BNEP filters: protocol multicast
[ 4378.773547] Bluetooth: BNEP socket layer initialized
[ 4404.587618] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4404.587621] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4404.587623] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4404.610856] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4404.610858] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4404.610861] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.077486] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.077489] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.077491] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.081636] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.081638] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.081640] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.170799] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.170802] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.170804] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.229398] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.229401] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.229403] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.295623] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.295625] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.295628] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.303492] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.303494] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.303496] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.315339] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.315341] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.315344] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4405.424626] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4405.424628] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4405.424631] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4482.359619] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4482.359621] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4482.359624] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4514.359416] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4514.359418] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4514.359420] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4524.568032] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4524.568034] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4524.568037] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4524.573524] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4524.573526] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4524.573528] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.014672] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.014675] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.014678] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.162444] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.162446] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.162449] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.164419] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.164421] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.164423] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.175666] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.175669] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.175671] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.176778] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.176780] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.176782] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.181860] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.181862] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.181865] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.183094] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.183096] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.183098] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
[ 4525.185939] rtw88_8821ce 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (R
eceiver ID)
[ 4525.185941] rtw88_8821ce 0000:01:00.0: device [10ec:c821] error status/mask=00000001/0000e000
[ 4525.185943] rtw88_8821ce 0000:01:00.0: [ 0] RxErr (First)
kelean@kevin