Re: [PATCH 3/3][update] PM / sleep: Introduce command line argument for sleep state enumeration

From: Pavel Machek
Date: Wed Jul 30 2014 - 06:55:38 EST


> For this reason I'm considering changing the defaul behavior going forward (so
> that "mem" is always present and means "the deepest sleep state available other
> than hibernation"), but I don't want to do that in one go.

Actually, I don't think that's good idea, at least on PC.

The way to wake up from S3 is power button. The way to wake up from
"echo freeze > state" is going to be different, right?

If I disable S3 in the BIOS and get different result from "echo mem >
state", that will be confusing.

Similar (but less severe) problem is there with S1, as it will
probably power down USB ports, etc.

So for example if I have system with S1, learn to do "echo mem >
state" and that it still charges my phone, then ACPI updates come and
"echo mem > state" now puts it in S3 and not charging my phone -- that
would be confusing.
(cesky, pictures)
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