Public bug reported:
Hello,
Since the latest kernel update on Ubuntu, the Bluetooth interface fails
to turn on. When clicking the Bluetooth toggle in GNOME Settings, it
immediately reverts to "Off".
Hardware: Asus Vivobook with MediaTek MT7921 (IMC Networks
Wireless_Device, USB ID 13d3:3563).
Symptoms & Logs:
Wi-Fi (mt7921e) works perfectly, but Bluetooth fails. Checking dmesg shows a
kernel Call Trace exactly when the system tries to power on the Bluetooth
interface during boot:
[ 2.686705] Workqueue: hci0 hci_power_on [bluetooth]
[ 2.686794] hci_dev_setup_sync+0x6c/0x430 [bluetooth]
[ 2.686921] hci_dev_do_open+0x28/0x70 [bluetooth]
[ 2.686954] hci_power_on+0x50/0x210 [bluetooth]
Workaround:
Booting into the previous kernel version via GRUB completely resolves the
issue, confirming this is a kernel regression in the latest update.
Thank you.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-138-generic 6.8.0-138.138
ProcVersionSignature: Ubuntu 6.8.0-138.138-generic 6.8.12
Uname: Linux 6.8.0-138-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: maximilien 2790 F.... wireplumber
/dev/snd/seq: maximilien 2784 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 8 13:26:01 2026
InstallationDate: Installed on 2024-09-25 (713 days ago)
InstallationMedia: Ubuntu 23.10 "Mantic Minotaur" - Beta amd64 (20230919.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 30fa:0400 USB Optical Mouse
Bus 001 Device 003: ID 3277:0036 ShineTech USB2.0 HD UVC WebCam
Bus 001 Device 004: ID 13d3:3563 IMC Networks Wireless_Device
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
MachineType: ASUSTeK COMPUTER INC. Vivobook_ASUSLaptop X1505ZA_X1505ZA
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-138-generic
root=UUID=c9c2268d-fb8b-4e94-b2c2-9cd082f69975 ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-6.8.0-138-generic N/A
linux-backports-modules-6.8.0-138-generic N/A
linux-firmware 20240318.git3b128b60.0ubuntu3.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/16/2023
dmi.bios.release: 5.26
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: X1505ZA.310
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X1505ZA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrX1505ZA.310:bd08/16/2023:br5.26:svnASUSTeKCOMPUTERINC.:pnVivobook_ASUSLaptopX1505ZA_X1505ZA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX1505ZA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:
dmi.product.family: Vivobook
dmi.product.name: Vivobook_ASUSLaptop X1505ZA_X1505ZA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2166767
Title:
Bluetooth bug
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