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To: acpi-jp@jp.FreeBSD.org, msmith@freebsd.org
From: "M. Warner Losh" <imp@bsdimp.com>
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Date: Tue, 22 Jul 2003 15:36:53 -0600
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Subject: [acpi-jp 2494] Re: acpi and cpu performance states
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In message: <8C14D51F-BB98-11D7-AE48-000393DA4D30@freebsd.org>
            Michael Smith <msmith@freebsd.org> writes:
: 
: On Monday, July 21, 2003, at 4:50 AM, Rudolph Pereira wrote:
: 
: > thanks for the explanation. My original problem "report" (on
: > freebsd-mobile) was that I'm getting about half the uptime on battery
: > under freebsd that I am on linux or winxp. I suppose my questions now
: > become:
: > - is this expected
: > - if it is, is there any way to tweak or otherwise "fix" it?
: 
: It's expected.  FreeBSD doesn't (last time I looked, anyway) support
: the low-power hardware idle states.

None of drivers currently support it.  I was thinking of adding some
support to the cbb driver when there are no cards inserted.

I have patches in my p4 tree that seem to correctly turn devices off
if no driver attaches to it.  However, there are some issues that need
to be worked out.  I'm doing something wrong on suspend, and there
needs to be a fallback video driver or some laptops turn off their
video display completely...

Warner
