[Bug 2170253] Re: ucsi_acpi times out (-110) after s2idle resume on IdeaPad Slim 5 14AKP10, causing ~12 s wake delay (kernel 7.0.0-38)

** Tags added: kernel-daily-bug -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb 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) Status in linux package in Ubuntu: New Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2170253/+subscriptions