Public bug reported:
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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Similar to Ubuntu bug #2138359 on ThinkPad P14s Gen 5
Intel, but reproduced on ThinkPad T14 Gen 5 Intel."
https://bugs.launchpad.net/bugs/2162837/+attachment/5989434/+files/thinkpad_shutdown_bug.tar.gz
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https://bugs.launchpad.net/bugs/2162837
Title:
ThinkPad T14 Gen 5 Intel automatically powers on after successful
shutdown
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