[Bug 292568] ACPI S3 broken on CURRENT (Jan 2026)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292568

--- Comment #3 from Marek Zarychta <[email protected]> ---
(In reply to Nuno Teixeira from comment #2)
I don’t know, this is most likely a different bug. This bug manifests itself in
such a way that after the first wake-up, the acpiconf -s 3 or acpiconf -s S3
command hangs (it cannot be interrupted or killed), and the computer (in this
case, a desktop PC) does not enter sleep mode.

I can confirm that the situation you are describing occurs on a laptop with
16.0-CURRENT. FreeBSD 15.0-STABLE correctly handles suspend and resume via
opening and closing the laptop lid. FreeBSD 16.0-CURRENT does not, and there
the situation is exactly as you describe, but it is still possible to suspend
the system using a command, and waking up from opening the lid works normally.

Therefore, the situation you described is a different kind of regression, which
was probably not reported before. Bisecting will be harder here because it is
not known when it was exactly broken.

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