Re: [Swsusp-devel] Re: Thoughts wanted on merging Software Suspend enhancements

Michael Frank (
Mon, 14 Jul 2003 02:17:29 +0800

On Saturday 12 July 2003 23:37, Pavel Machek wrote:
> > > > - user can abort at any time during suspend (oh, I forgot, I wanted
> > > > to...) by just pressing Escape
> > >
> > > That seems like missfeature. We don't want joe random user that is at
> > > the console to prevent suspend by just pressing Escape. Maybe magic
> > > key to do that would be acceptable...

Dumb question applicable to 9x% of computers: how do you secure the suspend
switch and OFF switch, not to mention the power plug or the battery?

As to security many portables have a bios password and no other passwords
thereafter for the user account. The abort feature events could be enabled
via swsusp proc entry mainly for (desktop) security. Also, then you ought
to think about securing suspend events (don't swsusp the webserver please)!

In practice, when suspending, in many cases one would like to abort. Suspend
should be abortable by ESC and post 1.0: the lid switch and/or suspend switch.
If you think about it it makes sense to abort suspend instead of having
to wait 15-40 seconds and reenter the bios password and wait another 10-30
seconds. (assuming 2.4 speeds)

The way I would use S3/S4 is reboot only for a new kernel, and really use the
machine portably much more. S3 would be used for short suspends and S4 for
longer suspends.

In short, this is an _important_ feature _as_ much as S3 and S4.


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