Public bug reported:
btintel_pcie: Lunar Lake Bluetooth controller enters error state
after firmware load (regression 7.0.0-28 → 7.0.0-29)
Summary
Intel Bluetooth (PCI ID 8086:A876) on Lenovo Yoga 9 14ILL10 (Lunar Lake) fails
to initialize on kernels 7.0.0-29-generic and 7.0.0-30
generic. The btintel_pcie driver successfully loads both firmware stages (IML
and PCI transport), but the controller enters an error
state during the post-firmware reset. The “alive interrupt” times out and Intel
Soft Reset fails with -ETIME (-62). Bluetooth worked
correctly on kernel 7.0.0-28-generic with the same firmware files. The
regression was introduced in 7.0.0-29.
Steps to Reproduce
Boot Lenovo Yoga 9 14ILL10 (model 83LC) with kernel 7.0.0-29-generic or
7.0.0-30-generic
Bluetooth controller fails to initialize — bluetoothctl show reports “No
default controller available”
Expected Behavior
Bluetooth controller initializes successfully (as it did on kernel
7.0.0-28-generic).
Actual Behavior
hciconfig shows hci0 with BD Address 00:00:00:00:00:00, state DOWN, 5 TX
errors. bluetoothctlcontroller available.”
Driver unbind/rebind reproduces the same failure — not a transient boot issue.
show reports “No default
System Information
Distro: Ubuntu 26.04 (Resolute)
Working kernel: 7.0.0-28-generic (confirmed working Aug 2–10, 2026)
Broken kernels: 7.0.0-29-generic (7.0.0-29.29) and 7.0.0-30-generic
(7.0.0-30.30)
Machine: Lenovo Yoga 9 2-in-1 14ILL10, model 83LC
SoC: Intel Lunar Lake
BIOS: Q9CN22WW (01/09/2025)
BT device: PCI 8086:A876, subsystem 8086:000E
Driver: btintel_pcie (in-tree,
/lib/modules/7.0.0-30-generic/kernel/drivers/bluetooth/btintel_pcie.ko.zst)
Firmware: intel/ibt-0190-0291-iml.sfi + intel/ibt-0190-0291-pci.sfi (Firmware
Version 107-8.26)
linux-firmware: 20260319.git217ca6e4.1ubuntu
Kernel Log (dmesg, annotated)
Stage 1 — IML firmware: SUCCESS
Bluetooth: hci0: Device revision is 0
Bluetooth: hci0: Secure boot is enabled
Bluetooth: hci0: OTP lock is disabled
Bluetooth: hci0: API lock is enabled
Bluetooth: hci0: Debug lock is disabled
Bluetooth: hci0: Minimum firmware build 1 week 10 2014
Bluetooth: hci0: Bootloader timestamp 2023.33 buildtype 1 build 45995
Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-iml.sfi
Bluetooth: hci0: Boot Address: 0x30098800
Bluetooth: hci0: Firmware Version: 107-8.26
Bluetooth: hci0: Waiting for firmware download to complete
Bluetooth: hci0: Firmware loaded in 60577 usecs
Bluetooth: hci0: Waiting for device to boot
Bluetooth: hci0: Device booted in 2195 usecs
Bluetooth: hci0: Waiting for device transition to d0
Bluetooth: hci0: Device moved to D0 in 0 usecs
Bluetooth: hci0: dsbr: enable: 0x01 value: 0x0b
Stage 2 — PCI transport firmware: FAILURE
Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfiBluetooth:
hci0: Boot Address: 0x10000800
Bluetooth: hci0: Firmware Version: 107-8.26
Bluetooth: hci0: Received gp1 mailbox interrupt ← repeated ~36 times
Bluetooth: hci0: Waiting for firmware download to complete
Bluetooth: hci0: Firmware loaded in 579658 usecs ← much slower than IML stage
Bluetooth: hci0: Received gp1 mailbox interrupt
Bluetooth: hci0: Controller in error state ← FAILURE POINT
Bluetooth: hci0: Timeout (3000 ms) on alive interrupt, alive context:
intel_reset1
Bluetooth: hci0: Failed to send frame (-62)
Bluetooth: hci0: sending frame failed (-62)
Bluetooth: hci0: Failed to send Intel Reset command
Bluetooth: hci0: Intel Soft Reset failed (-62)
Retry attempt: SAME FAILURE
Bluetooth: hci0: Firmware download retry count: 1
[...IML firmware loads again successfully...]
Bluetooth: hci0: Found device firmware: intel/ibt-0190-0291-pci.sfi
Bluetooth: hci0: Firmware loaded in 1033894 usecs
Bluetooth: hci0: Controller in error state
Bluetooth: hci0: Timeout (3000 ms) on alive interrupt, alive context:
intel_reset1
Bluetooth: hci0: Intel Soft Reset failed (-62)
Bluetooth: hci0: Received hw exception interrupt
Bluetooth: hci0: Unsupported cnvi 0x00000000 ← hardware ID unreadable
Bluetooth: hci0: Controller in error state
Bluetooth: hci0: Failed to read MSFT supported features (-62)
Comparison — working boot on 7.0.0-28 (May 29, 2026)
Bluetooth: hci0: Device booted in 35237 usecs
Bluetooth: hci0: Device moved to D0 in 51 usecs
Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0190-0291-pci.ddc
Bluetooth: hci0: Applying Intel DDC parameters completed
Bluetooth: hci0: Firmware timestamp 2025.25 buildtype 1 build 95112
Bluetooth: hci0: Firmware SHA1: 0x73cbad49
Bluetooth: hci0: Fseq status: Success (0x00)
Bluetooth: hci0: Fseq executed: 00.00.04.202
Bluetooth: hci0: Fseq BT Top: 00.00.04.197
Additional Context
rfkill reports Bluetooth as not blocked (soft or hard)
The same failure reproduces after manual driver unbind/rebind (not a race
condition at boot)
A systemd sleep hook (/usr/lib/systemd/system-sleep/bluetooth-wakeup-fix)
unbinds/rebinds this device around
s2idle to prevent spurious wakeups — this is unrelated to the failure (the
failure occurs on fresh boot before any sleep cycle)
Kernel 7.0.0-29-generic tested and confirmed broken — same failure as 7.0.0-30
Regression bisected to the 7.0.0-28 → 7.0.0-29 kernel transition
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-29-generic 7.0.0-29.29
ProcVersionSignature: Ubuntu 7.0.0-29.29-generic 7.0.12
Uname: Linux 7.0.0-29-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jkredfoot 6048 F.... pipewire
jkredfoot 6063 F.... wireplumber
/dev/snd/seq: jkredfoot 6048 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 1 22:36:48 2026
InstallationDate: Installed on 2026-02-16 (198 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
MachineType: LENOVO 83LC
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 xedrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-29-generic
root=UUID=ff800d1a-2b21-4bc4-a94c-5194f1b6a033 ro quiet splash
snd_sof.sof_debug=0x1 snd_soc_sof_sdw.dyndbg=+p
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-05-14 (110 days ago)
dmi.bios.date: 01/09/2025
dmi.bios.release: 1.22
dmi.bios.vendor: LENOVO
dmi.bios.version: Q9CN22WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76574 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Yoga 9 2-in-1 14ILL10
dmi.ec.firmware.release: 1.22
dmi.modalias:
dmi:bvnLENOVO:bvrQ9CN22WW:bd01/09/2025:br1.22:efr1.22:svnLENOVO:pn83LC:pvrYoga92-in-114ILL10:rvnLENOVO:rnLNVNB161216:rvrSDK0T76574WIN:cvnLENOVO:ct31:cvrYoga92-in-114ILL10:skuLENOVO_MT_83LC_BU_idea_FM_Yoga92-in-114ILL10:pfaYoga92-in-114ILL10:
dmi.product.family: Yoga 9 2-in-1 14ILL10
dmi.product.name: 83LC
dmi.product.sku: LENOVO_MT_83LC_BU_idea_FM_Yoga 9 2-in-1 14ILL10
dmi.product.version: Yoga 9 2-in-1 14ILL10
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: btintel kernel-bug-exists lunar-lake regression-proposed
** Attachment added: "bt-kernel-bug-report.md"
https://bugs.launchpad.net/bugs/2166130/+attachment/5996834/+files/bt-kernel-bug-report.md
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2166130
Title:
Bluetooth Issue
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2166130/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
