Re: S0i3 sleep testing image

Hey Charlie!

I believe Green Sardine is Cezanne, but just to be sure, can you send
me your pciconf -lv? There shouldn't be anything crazy to do to
support the Cezanne SMU. USB4 should just work.

> Looking at your repository it seems like some of the commits have since
> landed in main, so not sure how the rest should be rebased.

Yeah, the 'everything' branch was out of date (I have a different
branch for development, 'working2', as in "I'm working on this" not
necessarily "this works", but that contains some non-S0ix-related
patches too). I have just updated it:

https://github.com/obiwac/freebsd-s0ix/pull/15

This should now work for you. I will have to update the sleep testing
image soon-ish, but I want to figure out my C3 exit issues first.

On Wed, 25 Feb 2026 at 05:57, Charlie Li <vishwin@freebsd.org> wrote:
>
> On 20/10/2025 10:27, obiwac wrote:
> > Hia everyone!
> >
> > I am currently working on S0i3 support for FreeBSD, and I have
> > prepared a sleep testing image to make it easier to test this on a
> > wide variety of different hardware. You can find these images here:
> >
> > https://people.freebsd.org/~obiwac/s0ix/
> >
> > They are expected to successfully enter S0i3 on 7040 series AMD
> > processors, and may work on a wider variety of (AMD) machines (I do
> > not expect this to work out of the box on Intel, but I have never
> > tried this out). Instructions about how to read the S0i3 entry metrics
> > are available in the /root/README file or on that page.
> >
> > You can also of course build the kernel yourself instead:
> >
> > https://github.com/obiwac/freebsd-s0ix/tree/everything
> >
> > If you are interested in trying this out for yourself, it would be
> > great if you could send me the ACPI dump of your machine (acpidump
> > -dt) as well as the SMU metrics sysctl tree on AMD (sysctl
> > dev.amdsmu.0).
> >
> Old thread; some other folks have prodded and I keep forgetting about
> wanting to try this out since I have a Green Sardine machine,
> specifically a ThinkPad X13 gen 2 AMD. This one has the BIOS option to
> switch between S3 and S0ix, but the former does not actually work, as in
> the machine never resumes and a hard power cut is needed.
>
> Looking at your repository it seems like some of the commits have since
> landed in main, so not sure how the rest should be rebased. One of the
> items now in main is amdsmu, but it seems that the device is not
> available for this machine yet.
>
> --
> Charlie Li
> ...nope, still don't have an exit line.