Hi Ross, A new data point: the loop is still present on kernel 7.0.0-43-generic (installed 2026-11-06 via normal updates), tested WITHOUT acpi_mask_gpe=0x6D (confirmed in /proc/cmdline). Since my last test, systemd and udev were also updated (259.5-0ubuntu3.4 -> 259.9-0ubuntu0.1, 2026-10-26).
Three lid closes on battery, same boot: 1) closed 07:43:45, one suspend entry, opened 07:50:27 (clean) 2) closed 07:51:59, one suspend entry, opened 07:59:16 (clean) 3) closed 08:09:38: 08:09:40 suspend entry (s2idle) 08:09:41 suspend exit (woke after ~1 s) 08:10:11 suspend entry 08:10:12 suspend exit (~30 s later, same pattern) 08:10:41 suspend entry -> then it slept normally until I opened the lid at 09:19:50 So this is the same signature as before (immediate wake-up, retry after ~30 s), but this time it stopped by itself after two cycles. The bug is intermittent, which is why the first two clean tests do not prove anything. Earlier tests: on 7.0.0-31 (26.04 build) it looped for the whole 4 minutes (10 cycles) without the mask. I'm keeping the mask as a workaround. Happy to run any further test you suggest. István Kovács <[email protected]> ezt írta (időpont: 2026. okt. 14., Sze, 10:13): > Thanks, Ross. I installed linux-image-7.0.0-31-generic (the 26.04 build, > 7.0.0-31.31 from resolute-updates) and booted it once WITHOUT the > acpi_mask_gpe=0x6D parameter (confirmed in /proc/cmdline). The loop still > occurs: after closing the lid at 10:04:09, suspend entry/exit repeated > every ~30 s until I opened it at 10:08:30 (10 cycles in 4 minutes, on > battery). > > So the kernel version does not seem to be the cause. Note this -31 is the > 26.04 build, not the 24.04 one I ran before the release upgrade. I have not > tested an older linux-firmware (20240318...); I would rather not downgrade > it on a 26.04 system unless you think it is worth it. > > Ross Porter <[email protected]> ezt írta (időpont: 2026. okt. > 14., Sze, 4:35): > >> Apologies for the late reply. >> >> You can manually install recent kernels through apt, to list available >> kernels run: >> apt-cache search linux-image | grep generic >> >> To install a kernel you'll need to install the linux-image-* and the >> corresponding linux-modules-* package. For example: >> sudo apt install linux-image-7.0.0-31-generic >> linux-modules-7.0.0-31-generic >> >> When you boot grub will give you the option of which kernel you want to >> use. You can always check which kernel you're running with: >> uname -r >> >> Testing older versions of linux-firmware is more difficult, as recent >> versions aren't kept in the package repositories. To find all the >> linux-firmware releases go here: >> https://launchpad.net/ubuntu/+source/linux-firmware and then click on >> your series, then under 'binary packages' select your architecture, then >> click on the version you want to try on the left, and then you can download >> the .deb file, which you can install with apt: >> sudo apt install <deb_name>.deb >> >> -- >> You received this bug notification because you are subscribed to the bug >> report. >> https://bugs.launchpad.net/bugs/2169388 >> >> Title: >> ThinkBook 16 G8 IAL (21SK): s2idle suspend/resume loop after lid >> close, wake IRQ 9 (ACPI GPE 0x6D), ~20%/h battery drain >> >> Status in linux package in Ubuntu: >> Confirmed >> >> Bug description: >> Hardware: Lenovo ThinkBook 16 G8 IAL (21SK), Intel Meteor Lake, BIOS >> RKCN20WW >> OS: Ubuntu 26.04.1 LTS >> Kernels: 7.0.0-31 (no problem seen), 7.0.0-34 (problem), 7.0.0-38 >> (problem) >> >> Problem: >> After closing the lid, the laptop enters suspend (PM: suspend entry >> (s2idle)), wakes up after ~2 s (PM: suspend exit), is suspended again by >> logind ~30 s later, and this repeats until the lid is opened. This gives >> ~117 suspend entries per hour and a battery drain of ~20%/h (65% -> 20% in >> 2 hours). >> >> The problem is intermittent. Of 4 lid closes between 2026-09-30 and >> 2026-10-01 on kernel 7.0.0-34, two looped (2026-09-30 ~21:05-22:10 and >> 2026-10-01 19:23-00:18), two suspended normally. The loop also >> occurred on 7.0.0-38 (evening of 2026-10-02). >> >> History: >> - 7.0.0-31: ~3 weeks of daily use, never more than 3 suspend entries >> per hour. >> - 7.0.0-34 installed 2026-09-27, first loop seen 2026-09-30. >> - 7.0.0-38 installed 2026-10-02, loop continued. >> - The loops happened on battery, not on AC. >> >> Findings: >> - /sys/power/pm_wakeup_irq = 9 (ACPI SCI) after the premature wake-up. >> - During ~3-4 min of lid-closed s2idle, >> /sys/firmware/acpi/interrupts/gpe6D rose by ~9200 events; gpe6E (the EC >> GPE, "ACPI: EC: GPE=0x6e") rose by ~270. >> - Workaround: kernel parameter acpi_mask_gpe=0x6D. With it, a >> lid-closed suspend lasted 5h15m with a single suspend entry and 6% battery >> drain. Disabling gpe6D via sysfs did not persist across suspend; only the >> kernel parameter held. >> >> Usage pattern: the laptop is suspended every night with the lid >> closed; during the day the lid is closed at every study break (every >> 1-1.5 h). >> >> Unrelated, probably noise: an fwupd UEFI dbx update (20260402 -> >> 20260707) failed with "expected 20260707 and got (null)". >> >> Please tell me what additional information I should collect. >> >> 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: pilu 4464 F.... pipewire >> pilu 4470 F.... wireplumber >> /dev/snd/seq: pilu 4464 F.... pipewire >> CasperMD5CheckResult: pass >> CurrentDesktop: ubuntu:GNOME >> Date: Sat Oct 3 10:06:26 2026 >> InstallationDate: Installed on 2025-12-16 (290 days ago) >> InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 >> (20250805.1) >> MachineType: LENOVO 21SK >> ProcEnviron: >> LANG=en_US.UTF-8 >> PATH=(custom, no user) >> SHELL=/bin/bash >> TERM=xterm-256color >> XDG_RUNTIME_DIR=<set> >> ProcFB: 0 i915drmfb >> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-38-generic >> root=UUID=aae6094b-c046-479c-97da-6c5624645338 ro quiet splash >> acpi_mask_gpe=0x6D >> 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 2026-09-30 (3 days ago) >> dmi.bios.date: 06/06/2025 >> dmi.bios.release: 1.20 >> dmi.bios.vendor: LENOVO >> dmi.bios.version: RKCN20WW >> dmi.board.asset.tag: No Asset Tag >> dmi.board.name: LNVNB161216 >> dmi.board.vendor: LENOVO >> dmi.board.version: NO DPK >> dmi.chassis.asset.tag: No Asset Tag >> dmi.chassis.type: 10 >> dmi.chassis.vendor: LENOVO >> dmi.chassis.version: ThinkBook 16 G8 IAL >> dmi.ec.firmware.release: 1.14 >> dmi.modalias: >> dmi:bvnLENOVO:bvrRKCN20WW:bd06/06/2025:br1.20:efr1.14:svnLENOVO:pn21SK:pvrThinkBook16G8IAL:rvnLENOVO:rnLNVNB161216:rvrNODPK:cvnLENOVO:ct10:cvrThinkBook16G8IAL:skuLENOVO_MT_21SK_BU_idea_FM_ThinkBook16G8IAL:pfaThinkBook16G8IAL: >> dmi.product.family: ThinkBook 16 G8 IAL >> dmi.product.name: 21SK >> dmi.product.sku: LENOVO_MT_21SK_BU_idea_FM_ThinkBook 16 G8 IAL >> dmi.product.version: ThinkBook 16 G8 IAL >> dmi.sys.vendor: LENOVO >> >> To manage notifications about this bug go to: >> >> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2169388/+subscriptions >> >> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2169388 Title: ThinkBook 16 G8 IAL (21SK): s2idle suspend/resume loop after lid close, wake IRQ 9 (ACPI GPE 0x6D), ~20%/h battery drain To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2169388/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
