Public bug reported:
Hardware: Lenovo IdeaPad Slim 5 14AKP10 (AMD). No BIOS update available.
Kernel: 7.0.0-38-generic (linux-generic-hwe, upgraded from 6.17.0-23 on
2026-10-05)
Problem:
After closing and reopening the lid (suspend to s2idle), the laptop takes
about 6-12 seconds to wake. The delay started after the kernel upgrade.
Findings:
- Right after resume, ucsi_acpi logs:
ucsi_acpi USBC000:00: failed to re-enable notifications (-110)
The wake completes only after this timeout. The delay from
"Restarting tasks: Done" to "PM: suspend exit" was about 12 s
(e.g. 2026-10-09 00:40:29 -> 00:40:41).
- Running "modprobe -r ucsi_acpi" before suspend removes the delay completely
(gap drops to ~0.1 s). I now use a systemd system-sleep hook that unloads
ucsi_acpi on suspend and reloads it on resume as a workaround.
- Separately, charger plug/unplug events show:
ucsi_acpi USBC000:00: ucsi_handle_connector_change:
GET_CONNECTOR_STATUS failed (-110) (also -5 after a module reload)
and ACPI errors from the embedded controller:
ACPI Error: Thread X cannot release Mutex [ECMT] acquired by thread Y
Aborting method \_SB.PCI0.LPC0.EC0._Q9E (AE_AML_NOT_OWNER)
Charger status updates in the desktop are slow (udev events delayed ~8 s).
- On every resume there is also a firmware error:
ACPI BIOS Error (bug): Could not resolve symbol [^^^GPP5.RTKW], AE_NOT_FOUND
Aborting method \_SB.PCI0.LPC0.EC0.UPHK / \_SB.PEP._DSM
Expected: wake from suspend in about 1 s, without ucsi_acpi timeouts.
Actual: 6-12 s wake delay tied to ucsi_acpi -110 timeouts.
Not verified: whether the 6.17 kernel is unaffected (it is no longer
installed), so this may be a regression or a firmware issue exposed by 7.0.
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
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 9 02:55:39 2026
InstallationDate: Installed on 2026-03-18 (204 days ago)
InstallationMedia: Ubuntu 24.04.4 LTS "Noble Numbat" - Release amd64 (20260210)
MachineType: LENOVO 83HX
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-38-generic
root=UUID=8acb0ebd-2842-4c20-9cc8-f2fa50a733d9 ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-10-07 (1 days ago)
dmi.bios.date: 03/31/2026
dmi.bios.release: 1.28
dmi.bios.vendor: LENOVO
dmi.bios.version: R0CN28WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76582 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad Slim 5 14AKP10
dmi.ec.firmware.release: 1.28
dmi.modalias:
dmi:bvnLENOVO:bvrR0CN28WW:bd03/31/2026:br1.28:efr1.28:svnLENOVO:pn83HX:pvrIdeaPadSlim514AKP10:rvnLENOVO:rnLNVNB161216:rvrSDK0T76582WIN:cvnLENOVO:ct10:cvrIdeaPadSlim514AKP10:skuLENOVO_MT_83HX_BU_idea_FM_IdeaPadSlim514AKP10:pfaIdeaPadSlim514AKP10:
dmi.product.family: IdeaPad Slim 5 14AKP10
dmi.product.name: 83HX
dmi.product.sku: LENOVO_MT_83HX_BU_idea_FM_IdeaPad Slim 5 14AKP10
dmi.product.version: IdeaPad Slim 5 14AKP10
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2170253
Title:
ucsi_acpi times out (-110) after s2idle resume on IdeaPad Slim 5
14AKP10, causing ~12 s wake delay (kernel 7.0.0-38)
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