Public bug reported:
Since the update to kernel 7.0.0-38, my laptop (ThinkPad T14s Gen 6, Lunar
Lake) often fails to suspend when I close the lid. It wakes up again right
away and retries about every 30 seconds until I re-open the lid. This has
happened 10 times since the update. Twice it kept going for about 8 hours
(>900 failed attempts each) until the battery ran out.
The journal shows this on every failed attempt:
Bluetooth: hci0: Timeout (500 ms) on tx completion
Bluetooth: hci0: Failed to send frame (-62)
Bluetooth: hci0: Timeout (200 ms) on alive interrupt for D2 entry, retry
count 0
Bluetooth: hci0: Timeout (200 ms) on alive interrupt for D2 entry, retry
count 1
Bluetooth: hci0: Timeout (200 ms) on alive interrupt for D2 entry, retry
count 2
btintel_pcie 0000:00:14.7: PM: pci_pm_suspend(): btintel_pcie_suspend
[btintel_pcie] returns -16
btintel_pcie 0000:00:14.7: PM: failed to suspend async: error -16
PM: Some devices failed to suspend, or early wake event detected
systemd-sleep: Failed to put system to sleep. System resumed again: Device or
resource busy
I also see "Bluetooth: hci0: Failed to get mac access (-62)" at least once in
every
boot on 7.0.0-38, never on older kernels.
It looks like a regression to me. Counting suspends in my journal:
7.0.0-22: 20 ok, 0 failed
7.0.0-27: 220 ok, 0 failed
7.0.0-31: 16 ok, 0 failed
7.0.0-38: 36 ok, 3520 failed (in 10 lid-close episodes)
BIOS and Bluetooth firmware are the same on 7.0.0-31 and 7.0.0-38. The
7.0.0-38 changelog has several btintel/btintel_pcie changes that might be
related.
It doesn't happen every time: about 1 in 5 suspends on 7.0.0-38 (10 of
46). I haven't found a pattern. When it happens, it shows up in
journalctl -b | grep -E 'btintel_pcie.*-16|Failed to put system to sleep'
Workaround: a script in /usr/lib/systemd/system-sleep/ that unloads the module
before suspend and loads it again after resume. Suspend worked with it so far:
case "$1" in
pre) modprobe -r btintel_pcie ;;
post) modprobe btintel_pcie ;;
esac
Possibly related upstream (I'm not sure it's the same problem):
https://bugzilla.kernel.org/show_bug.cgi?id=221481, with a fix in mainline
after 7.3 (commit 12997a385f71).
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-38-generic 7.0.0-38.38
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: henning 4013 F.... pipewire
henning 4022 F.... wireplumber
/dev/snd/seq: henning 4013 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 28 21:35:26 2026
InstallationDate: Installed on 2026-06-11 (139 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 21QXCTO1WW
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 xedrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-38-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
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: No upgrade log present (probably fresh install)
dmi.bios.date: 06/16/2026
dmi.bios.release: 1.16
dmi.bios.vendor: LENOVO
dmi.bios.version: N4IET30W (1.16 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21QXCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.12
dmi.modalias:
dmi:bvnLENOVO:bvrN4IET30W(1.16):bd06/16/2026:br1.16:efr1.12:svnLENOVO:pn21QXCTO1WW:pvrThinkPadT14sGen6:rvnLENOVO:rn21QXCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21QX_BU_Think_FM_ThinkPadT14sGen6:pfaThinkPadT14sGen6:
dmi.product.family: ThinkPad T14s Gen 6
dmi.product.name: 21QXCTO1WW
dmi.product.sku: LENOVO_MT_21QX_BU_Think_FM_ThinkPad T14s Gen 6
dmi.product.version: ThinkPad T14s Gen 6
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug regression-update resolute wayland-session
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https://bugs.launchpad.net/bugs/2172416
Title:
Laptop doesn't stay in suspend since kernel 7.0.0-38 (btintel_pcie
returns -16)
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