On Monday 11 October 2004 3:12 pm, Stefan Seyfried wrote:
> David Brownell wrote:
> 
> > The machines I've tested with relatively generic 2.6.9-rc kernels
> > don't use BIOS support for S4 when I call swsusp.
> 
> first do either
> echo platform > /sys/power/disk     # for S4
> echo shutdown > /sys/power/disk     # for poweroff
> 
> then do
> echo disk > /sys/power/state

Oddly enough, neither of them work lately for me.
They each resume immediately after writing the
image to disk.

- Dave

p.s. I find the /sys/power/disk file mildly cryptic, maybe
    other folk will find the attached patch slightly more
    informative about what this interface can do.