Summary: Resume from S3: [PATCH] Fix poweroff after resume
according to ACPI 3.0 specs (P62)
Kernel Version: 22.214.171.124
Most recent kernel where this bug did not occur: n/a
Distribution: Mainline 126.96.36.199 + acpi-release-20060310-2.6.16 patches
Hardware Environment: Thinkpad T43 2687
Software Environment: Debian
Resuming from S3 (suspend-to-ram) using the power button causes a stray
power-button event which shutdowns the machine. Apparently, ACPI 3.0 P62 says
the kernel should be cleaning up the stray powerbutton event, instead of letting
userspace deal with the mess.
There is an analysis and patch about this issue at
I am just reporting the bug (which I verified), and the possible solution by Mr.
Arnaud Patard in the above mentioned post.
Steps to reproduce:
boot with a kernel using acpi_sleep=s3_bios
do echo mem > /sys/power/state (preferably using a properly setup hibernate
wake machine up using the power button
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