NetBSD Problem Report #58330

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Date: Sun,  9 Jun 2024 21:05:16 +0000 (UTC)
From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: zzz should suspend machine
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>Number:         58330
>Category:       bin
>Synopsis:       zzz should suspend machine
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jun 09 21:10:00 +0000 2024
>Last-Modified:  Fri Mar 13 02:50:01 +0000 2026
>Originator:     Taylor R Campbell
>Release:        current, 10, 9, ...
>Organization:
The NetBSD Suspension
>Environment:
>Description:
A long time ago, the zzz(8) command was the front end to triggering system suspend.

It was deleted a while ago with the rest of legacy APM support, but the man page confusingly persists: https://man.netbsd.org/zzz.8

Instead, the supported way to trigger suspend on ACPI-based systems is:

sysctl -w hw.acpi.sleep.state=3

This is quite a mouthful and hard to remember (and it also changed from machdep.acpi.sleep_state or something a few years ago).

We should restore the much more memorably-named zzz(8) as a one-liner shell script to do this.
>How-To-Repeat:
try to remember how to suspend a machine
>Fix:
Yes, please!

>Audit-Trail:
From: "David H. Gutteridge" <david@gutteridge.ca>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: bin/58330: zzz should suspend machine
Date: Thu, 12 Mar 2026 22:48:31 -0400

 Perhaps something like...
 https://github.com/dhgutteridge/pkgsrc-local/blob/master/sysutils/zzz/zzz.s=
 h

 (I'm tired of worrying about email and GNATS mangling patches, so I
 put it there.)

 The first check being perhaps redundant, but gives a more user-friendly
 sort of message. The second check since the zzz(8) man page gets
 installed everywhere right now (presumably we don't want/need a separate
 one for this script, heh).

 Now, in PR bin/60049, uwe@ also mentions 'To go from "cannot" to "can"
 all you need is to write a driver (a loadable kernel module) that talks
 rather simple apm(4) ioctls.' Not sure if that's preferable here.

 Regards,

 Dave

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