Public bug reported:
SUMMARY:
The Bluetooth adapter integrated in a Realtek RTL8822BE WiFi+BT combo
(USB ID 0bda:b00b, "Realtek Bluetooth 4.2 Adapter") is no longer
detected after upgrading from kernel 7.0.0-15-generic to
7.0.0-22-generic on Ubuntu 26.04 LTS.
STEPS TO REPRODUCE:
1. Boot 7.0.0-15-generic
2. `lsusb` shows: Bus 001 Device 005: ID 0bda:b00b Realtek Semiconductor
Corp. Realtek Bluetooth 4.2 Adapter
3. `rfkill list` shows hci0: Bluetooth (unblocked)
4. Bluetooth works normally (pairing, GNOME settings, etc.)
5. Reboot into 7.0.0-22-generic
6. `lsusb` no longer lists the Bluetooth device at all (only the WiFi
PCI device, RTL8822BE, kernel driver rtw88_8822be, is present and
working normally)
7. `rfkill list` shows no Bluetooth entry at all
8. `dmesg | grep -i blue` / `dmesg | grep -i hci` show nothing
9. Manually running `modprobe btusb` and `modprobe btrtl` loads
without error, but no hci0 device appears and no USB device is
enumerated for the Bluetooth controller.
EXPECTED:
Bluetooth controller should be enumerated on USB and hci0 should be
available, as it is on 7.0.0-15-generic.
ACTUAL:
The internal USB Bluetooth device for this combo card disappears
entirely from lsusb under 7.0.0-22-generic. No errors in dmesg related
to USB enumeration failure for this device were found.
WORKAROUND:
Booting 7.0.0-15-generic restores Bluetooth functionality completely,
with no other configuration changes. This strongly suggests a kernel
regression introduced between 7.0.0-15 and 7.0.0-22 affecting USB
enumeration/power management for this internal Bluetooth controller
(possibly related to USB autosuspend, ACPI power resource handling,
or a regression in btusb/btrtl probing).
HARDWARE:
- HP Pavilion Notebook 15-bc5xxx
- Network controller: Realtek RTL8822BE 802.11ac 2x2 WiFi + Bluetooth
4.2 Combo Adapter (rtw88_8822be driver, WiFi works fine on both
kernels)
- Bluetooth USB ID: 0bda:b00b
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-15-generic 7.0.0-15.15
ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0
Uname: Linux 7.0.0-15-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: vincent 2661 F.... wireplumber
/dev/snd/controlC1: vincent 2661 F.... wireplumber
/dev/snd/seq: vincent 2617 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Jun 14 23:29:26 2026
InstallationDate: Installed on 2026-04-24 (51 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
IwDevWlo1Link: Not connected.
MachineType: HP HP Pavilion Notebook 15-bc5xxx
ProcEnviron:
LANG=fr_FR.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB:
0 i915drmfb
1 nvidia-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-15-generic
root=UUID=904bee79-a458-4561-9a32-05947037bb7a ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2019
dmi.bios.release: 15.6
dmi.bios.vendor: AMI
dmi.bios.version: F.06
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 8640
dmi.board.vendor: HP
dmi.board.version: 52.06
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 52.6
dmi.modalias:
dmi:bvnAMI:bvrF.06:bd09/03/2019:br15.6:efr52.6:svnHP:pnHPPavilionNotebook15-bc5xxx:pvr:rvnHP:rn8640:rvr52.06:cvnHP:ct10:cvrChassisVersion:sku8RU38EA#ABF:pfa103C_5335KVHPPavilion:
dmi.product.family: 103C_5335KV HP Pavilion
dmi.product.name: HP Pavilion Notebook 15-bc5xxx
dmi.product.sku: 8RU38EA#ABF
dmi.sys.vendor: HP
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2156732
Title:
Bluetooth on Realtek RTL8822BE (0bda:b00b) not enumerated under
7.0.0-22-generic, works under 7.0.0-15-generic
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