[Desktop] Bluetooth adapter vanised.

[Kelean]

My bluetooth vanished after the last upgrade. I was hoping that it would be fixed after today's upgrade but no.

After that last upgrade it informed me that i needed to reboot. After booting I had no bluetooth adapter. So I am unable to use my bluetooth speakers,
when I go system settings bluetooth. It tells me that there is no bluetooth adpter and need to use an external adapter for bluetooth.

My speakers had been running fine with the exception of having ti reconnect them from time to time.

Operating System: Kubuntu 26.04 LTS
KDE Plasma Version: 6.6.6
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.2
Kernel Version: 7.0.0-30-generic (64-bit)
Graphics Platform: Wayland
Processors: 6 × Intel® Core™ i5-8400 CPU @ 2.80GHz
Memory: 8 GiB of RAM (7.6 GiB usable)
Graphics Processor: Intel® UHD Graphics 630
Manufacturer: LENOVO
Product Name: 90HV0003US
System Version: ideacentre 510A-15ICB

This is my system If you could point me in the right direction I would be most grateful.
thank you kevin

[Snowhog]

Welcome to KFN!


AI Overview

To identify your Bluetooth adapter from the command line on Ubuntu 26.04 LTS, use the interactive bluetoothctl utility and type show, or run hardware query commands like lsusb or dmesg in your terminal.

Using Bluetooth-Specific Tools

• bluetoothctl: Type bluetoothctl in your terminal to enter the interactive prompt, then type show to see details of your active controller, MAC address, and manufacturer. Type exit when done.

• btmgmt info: Runs a management-level inquiry via the BlueZ stack to display installed controller indices, addresses, and versions.

Checking Physical Hardware Buses

• lsusb | grep -i bluetooth: Lists connected USB-based Bluetooth adapters along with their vendor and device IDs (such as Intel or Realtek).

• lspci | grep -i bluetooth: Detects internal PCIe or PCI-bus connected wireless/Bluetooth combination cards.

Inspecting Kernel and System Logs

• sudo dmesg | grep -i bluetooth: Searches recent kernel ring-buffer messages for loaded Bluetooth hardware drivers, firmware logs, and initialization step

Copy and paste the output each command in your reply.

[Kelean]

Thant you Snowhog.

I ran the commands that you listed and here are the resluts

kelean@kevin-90hv0003us:~$ bluetoothctl
Agent registered
[bluetoothctl]> show
No default controller available
[bluetoothctl]> exit
kelean@kevin-90hv0003us:~$ btmgmt info
Index list with 0 items
kelean@kevin-90hv0003us:~$ lsusb | grep -i bluetooth:
kelean@kevin-90hv0003us:~$ lsusb | grep -i bluetooth
kelean@kevin-90hv0003us:~$ lspci | grep -i bluetooth
kelean@kevin-90hv0003us:~$ sudo dmesg | grep -i bluetooth
[sudo: authenticate] Password:
[ 858.028256] Bluetooth: Core ver 2.22
[ 858.028283] NET: Registered PF_BLUETOOTH protocol family
[ 858.028285] Bluetooth: HCI device and connection manager initialized
[ 858.028288] Bluetooth: HCI socket layer initialized
[ 858.028290] Bluetooth: L2CAP socket layer initialized
[ 858.028293] Bluetooth: SCO socket layer initialized
[ 871.031298] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 871.031303] Bluetooth: BNEP filters: protocol multicast
[ 871.031306] Bluetooth: BNEP socket layer initialized
kelean@kevin-90

So what do I do now?

[Snowhog]

Is this a laptop?

My bluetooth vanished after the last upgrade.

When you say 'upgrade', you mean upgrade to 26.04? What version were you using when the Bluetooth was working?

[Kelean]

This is a desktop. I have been running 26.04 for about two months now. Bluetooth was working well. I would have to connect the speakers after it would go to sleep. After seven to ten days I would have to remove my speakers and pair them again. The missing bluetooth adapter was after the big update two weeks ago.

[Snowhog]

Have you tried booting into the previous kernel to eliminate the current kernel as the potential problem?

[Kelean]

No I haven't because I am entirely sure how to do it. I an 68 and have gotten how to use the command line.
Back in the day I installed Slackware 3.5 on a 486 that had a 1440 modem. It only took me two weeks reconfigure the driver for the modem to work.

[Snowhog]

Just reboot your PC, and when at the Grub menu, down arrow to Advanced options for Ubuntu and press Enter.
Down arrow twice so previous kernel entry (the one without (recovery mode)) is highlighted and press Enter.

[Kelean]

I tried the last kernel and the one before that. I'm running 7.0.0-27-generic (64-bit). This is just frustrating

[Kelean]

I failed to say that no difference with either kernels.

[Snowhog]

How do you maintain your system; how do you perform package updates?

[Kelean]

I just do all up dates using synaptic. I use this computer for reading news. Streaming various platforms. Paying a few bills that I cannot do on my phone.

[die.boer]

please post the output of these 5 :

lsusb

lspci -nnk

rfkill list

lsmod | grep -E 'bluetooth|btusb|btintel|btrtl|btbcm|btmtk'

sudo dmesg | grep -Ei 'bluetooth|btusb|btintel|firmware|usb.*disconnect|usb.*error'

[Kelean]

kelean@kevin-90hv0003us:~$ lsusb | grep -i bluetooth
kelean@kevin-90hv0003us:~$ sudo dmesg | grep -i bluetooth
[sudo: authenticate] Password:
kelean@kevin-90hv0003us:~$ btmgmt info
Index list with 0 items
kelean@kevin-90hv0003us:~$ bluetoothctl
Agent registered
[bluetoothctl]> exit
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:~$ lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers [8086:3
ec2] (rev 07)
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: skl_uncore
Kernel modules: ie31200_edac
00:02.0 VGA compatible controller [0300]: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630] [8086:3
e92]
DeviceName: Onboard - Video
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: i915
Kernel modules: i915
00:08.0 System peripheral [0880]: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen C
ore Processor Gaussian Mixture Model [8086:1911]
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
00:14.0 USB controller [0c03]: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller [8086:a36
d] (rev 10)
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
00:14.2 RAM memory [0500]: Intel Corporation Cannon Lake PCH Shared SRAM [8086:a36f] (rev 10)
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
00:16.0 Communication controller [0780]: Intel Corporation Cannon Lake PCH HECI Controller [8086:a360]
(rev 10)
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: mei_me
Kernel modules: mei_me
00:17.0 SATA controller [0106]: Intel Corporation Cannon Lake PCH SATA AHCI Controller [8086:a352] (rev
10)
DeviceName: Onboard - SATA
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: ahci
Kernel modules: ahci
00:1c.0 PCI bridge [0604]: Intel Corporation Cannon Lake PCH PCI Express Root Port #6 [8086:a33d] (rev
f0)
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1f.0 ISA bridge [0601]: Intel Corporation B360 Chipset LPC/eSPI Controller [8086:a308] (rev 10)
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
00:1f.3 Audio device [0403]: Intel Corporation Cannon Lake PCH cAVS [8086:a348] (rev 10)
DeviceName: Onboard - Sound
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_soc_avs, snd_sof_pci_intel_cnl, snd_hda_intel
00:1f.4 SMBus [0c05]: Intel Corporation Cannon Lake PCH SMBus Controller [8086:a323] (rev 10)
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller [8086:a324] (rev
10)
DeviceName: Onboard - Other
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: intel-spi
Kernel modules: spi_intel_pci
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (7) I219-V [8086:15bc] (rev 1
0)
DeviceName: Onboard - Ethernet
Subsystem: Lenovo Device [17aa:36eb]
Kernel driver in use: e1000e
Kernel modules: e1000e
01:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Net
work Adapter [10ec:c821]
Subsystem: Lenovo Device [17aa:c024]
Kernel driver in use: rtw88_8821ce
Kernel modules: rtw88_8821ce
kelean@kevin-90hv0003us:~$ rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
kelean@kevin-90hv0003us:~$ lsmod | grep -E 'bluetooth|btusb|btintel|btrtl|btbcm|btmtk'
bluetooth 1130496 9 bnep
kelean@kevin-90hv0003us:~$ sudo dmesg | grep -Ei 'bluetooth|btusb|btintel|firmware|usb.*disconnect| usb.
*error'
[sudo: authenticate] Password:
[ 347.798950] Bluetooth: Core ver 2.22
[ 347.798979] NET: Registered PF_BLUETOOTH protocol family
[ 347.798980] Bluetooth: HCI device and connection manager initialized
[ 347.798984] Bluetooth: HCI socket layer initialized
[ 347.798985] Bluetooth: L2CAP socket layer initialized
[ 347.798988] Bluetooth: SCO socket layer initialized
[ 348.085991] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 348.085995] Bluetooth: BNEP filters: protocol multicast
[ 348.085998] Bluetooth: BNEP socket layer initialized
kelean@kevin-90hv0003us:~$

[oshunluvr]

Assuming I had the part number correct, it looks like kernel 7 series breaks the legacy driver for that bluetooth/wireless adapter. You could try installing the last series 6 kernel and boot to it instead of 7.

Or Google says you can do this