Re: S0i3 sleep testing image

From: Charlie Li <vishwin_at_freebsd.org>
Date: Tue, 03 Mar 2026 23:28:19 UTC
obiwac wrote:
>> This has been entirely on 'everything'. I have not tried suspending
>> because the states are not listed yet, so acpiconf(8), by extension
>> zzz(8) and further desktop-related integrations will either error out or
>> not list the option:
> 
> s2idle is not an ACPI state so it is expected that it won't be listed
> in hw.acpi.supported_sleep_state, and acpiconf will not be able to
> support this either. Instead, I'm working on a new interface for this:
> https://reviews.freebsd.org/D55508. Once landed, zzz will be updated
> to use that interface.
> 
I'll also need to look at how the desktop integrations detect and 
populate the power options that are presented. Right now, at least in my 
desktop environment, only Hibernate, Restart and Shut Down are 
available, but if the S3 option is toggled in BIOS, Suspend is also 
presented, not least since it would appear in hw.acpi.supported_sleep_state.
> In the meantime, the
> hw.acpi.{standby,suspend,lid_switch,sleep_button}_state sysctls do
> already support taking in generic sleep types, so you can set them to
> s2idle instead of the ACPI states. You can see all supported sleep
> types in kern.power.supported_stype, but I can see your machine
> already reports s2idle support as hw.acpi.sleep_button_state is set to
> s2idle already.
> 
# sysctl hw.acpi.suspend_state=s2idle
hw.acpi.suspend_state: NONE
sysctl: hw.acpi.suspend_state=s2idle: Invalid argument
>> Unless there's a different way to enter suspend state.
> 
> You can set hw.acpi.power_button_state=s2idle and then press your power button.
> 
Going to try this and see what happens.

-- 
Charlie Li
...nope, still don't have an exit line.