Hi Ross, thanks for the reply. I can't go back to 7.0.0-31: it was removed by the apt cleanup on 2026-10-02 when -38 was installed. As written in comment #2, the loop started on 2026-09-30, right after the release upgrade from 24.04 to 26.04, while still running 7.0.0-34. That same kernel had run loop-free on 24.04 for about a day before the upgrade.
Your firmware idea fits that timeline: the release upgrade also upgraded linux-firmware from 20240318.git3b128b60.0ubuntu3.1 to 20260319.git217ca6e4.1ubuntu (see /var/log/dist-upgrade/history.log). I can try to test with the older linux-firmware if you tell me how to get it, or run any other test you suggest. Ross Porter <[email protected]> ezt írta (időpont: 2026. okt. 5., H, 0:00): > Hi, > > Thanks for filing a bug report. Does the problem go away if you go back > to the 7.0.0-31 kernel? If it still occurs on -31 it might instead be > caused by one of the linux-firmware packages being upgraded. > > -- > 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
