[ACPI] Re: S3-resume in FreeBSD

[Nate L. <na...@ro...>]

On Fri, 9 Apr 2004, Dominik Brodowski wrote:
> Do you know, by chance, if FreeBSD's resume process from S3 equals
> acpi_sleep=s3_mode, s3_bios or none of these special hacks?
>
> Many thanks,
> 	Dominik

I don't actually know what those flags do on Linux.  You can see the path
taken for suspend/resume by following these functions in the linked files:

http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/sys/dev/acpica/acpi.c?rev=1.136&content-type=text/plain
acpi_SetSleepState()

http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/sys/i386/acpica/acpi_wakeup.c?rev=1.31&content-type=text/plain
acpi_sleep_machdep()

[sleep S3, wakeup]

http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/sys/i386/acpica/acpi_wakecode.S?rev=1.9
acpi wakecode runs and returns to acpi_restorecpu() (in acpi_wakeup.c)

We just committed code to save/restore BARs for PCI devices.  That should
fix some problems.  We support _PRW/_PSW so lid switch wakes devices.
Things left to do include _SxD support and I think there are some problems
with the ACPI-CA path for suspend/resume (i.e. it doesn't always clear
wake status).

-Nate