[Bug 2162837] Re: ThinkPad T14 Gen 5 Intel automatically powers on after successful shutdown

Additional investigation results After creating this report, I performed extensive troubleshooting. Environment - Lenovo ThinkPad T14 Gen 5 Intel - Machine Type: 21MMS57F00 - Intel Core Ultra 7 155U (Meteor Lake) - Ubuntu 24.04.4 LTS - Linux 6.17.0-35-generic - GNOME 46 - Wayland Firmware System BIOS: N47ET29W (1.18) Embedded Controller Firmware: 1.16 Intel Management Engine: 1.18.2724 All firmware components are reported as up to date by fwupd. Observed behaviour The problem is fully reproducible. Shutdown was tested using: - GNOME "Power Off" - sudo systemctl poweroff Both produce exactly the same behaviour. Shutdown sequence is normal: - display turns off - fan stops - power LED turns off Approximately 1–3 seconds later the notebook automatically powers on again without pressing the power button. This is not a reboot. Linux successfully completes the shutdown before the system powers on again. systemd-logind systemd-logind reports: "The system will power off now." "System is powering down." No reboot request is issued. journalctl Shutdown completes successfully. No kernel panic. No watchdog reset. No reboot request. Wake sources The following tests were performed: - RTC wakealarm is empty. - Wake-on-LAN disabled. - ACPI wake sources disabled using /proc/acpi/wakeup before shutdown. - USB devices disconnected. - Battery only. - AC adapter connected. The behaviour remains unchanged. Windows comparison Windows 11 on the same hardware shuts down correctly and remains powered off. Hardware history The problem has existed across multiple BIOS versions. The motherboard has already been replaced twice by Lenovo service. The behaviour did not change after motherboard replacement. Firmware validation fwts completed successfully and did not report any critical ACPI firmware errors. Related issue This issue appears to be very similar to Ubuntu Bug #2138359 affecting ThinkPad P14s Gen 5 Intel based on the same Intel Meteor Lake platform. Diagnostic archive is attached to this report. -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2162837 Title: ThinkPad T14 Gen 5 Intel automatically powers on after successful shutdown Status in linux package in Ubuntu: New Bug description: Similar to Ubuntu bug #2138359 on ThinkPad P14s Gen 5 Intel, but reproduced on ThinkPad T14 Gen 5 Intel. Hardware Model: Lenovo ThinkPad T14 Gen 5 Intel Machine Type: 21MMS57F00 CPU: Intel Core Ultra 7 155U (Meteor Lake) BIOS: N47ET29W (1.18) Operating System Ubuntu 24.04.4 LTS Kernel: 6.17.0-35-generic Desktop: GNOME 46 (Wayland) Problem After selecting "Power Off" from GNOME or executing: sudo systemctl poweroff the system performs a normal shutdown. The display turns off. The fan stops. The power LED turns off. Approximately 1–3 seconds later the notebook powers on again automatically without pressing the power button. This is not a reboot. The system fully powers off before powering on again. Expected result The notebook should remain powered off. Actual result The notebook automatically powers on again. Troubleshooting already performed - Tested GNOME shutdown. - Tested "sudo systemctl poweroff". - Battery only. - AC adapter connected. - USB mouse connected and disconnected. - Wake-on-LAN disabled. - RTC wakealarm is empty. - ACPI wake sources disabled using /proc/acpi/wakeup. - Latest BIOS installed (1.18). - journalctl shows successful PowerOff. - systemd-logind correctly requests PowerOff (not Reboot). - fwts reports no critical ACPI firmware errors. No change. Windows comparison Windows 11 on the same machine shuts down correctly and remains powered off. History The issue has existed across multiple BIOS versions. The motherboard has already been replaced twice by Lenovo service. The problem remains unchanged. Additional information A complete diagnostic archive is attached (thinkpad_shutdown_bug.tar.gz). This issue appears very similar to Ubuntu bug #2138359 reported on ThinkPad P14s Gen 5 Intel using the same Intel Meteor Lake platform. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2162837/+subscriptions