Suspend-to-disk resuming

[Ben Jencks]

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Fabian Keil <freebsd-listen at fabiankeil.de> writes:

> Ben Jencks <ben-freebsd-questions at bjencks.net> wrote:
>
>> I'm trying to get suspend-to-disk (S4OS) working. (S3 doesn't work, but
>> I'll worry about that later). When I run acpiconf -s 4, it appears to
>> suspend ok. However, when I boot the computer, it just boots as normal,
>> rather than resuming (it does complain about uncleanly unmounted
>> disks). How do I tell the kernel to load a suspend-to-disk image rather
>> than booting?
>
> What makes you think, that S4OS is supported in FreeBSD?
> AFAIK only S4BIOS is working at the moment.

After reading other mailing lists (-acpi), this has become clear. The
handbook gives no hint that it's not supported, though.
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/acpi-debug.html

> In Message-ID: <42D174A1.2080707 at root.org>
> (Subject: Re: is anyone working on software suspend-to-disk and/or -current)
> Nate Lawson wrote yesterday:
> |As far as I know, no one is working on suspend to disk at this time.
>
> Regarding S3, here is what I had to do to make it work on my ThinkPad R51
> running 5.4-STABLE:
>
> In /boot/loader.conf I added: 
> acpi_video_load="YES"
>
> In /etc/sysctl.conf:
> hw.acpi.reset_video=0
> hw.syscons.sc_no_suspend_vtswitch=1

I'll try these, though the mode of failure (massive slowdown, not video
failure) makes it seem unlikely. I'm also going to try without USB, and
with a patch from -acpi.

Thanks,
Ben
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