PERFORCE change 132974 for review
John Baldwin
jhb at FreeBSD.org
Thu Jan 10 08:55:36 PST 2008
http://perforce.freebsd.org/chv.cgi?CH=132974
Change 132974 by jhb at jhb_zion on 2008/01/10 16:54:55
Update.
Affected files ...
.. //depot/projects/power/notes#12 edit
Differences ...
==== //depot/projects/power/notes#12 (text+ko) ====
@@ -69,3 +69,15 @@
The second stage will be to make the powering off of devices more automated.
This is still in early design stage. It may involve a powerd, it may
involve intelligence in the kernel.
+
+Other stuff:
+
+- Make the DPMS support in acpi_video a separate driver that attaches to
+ vgapci0
+- Automated idle device power management
+ - Basic idea is that when a device is idle for a specified amount of time,
+ it should power down into D1 or D2. For example, NICs can power down
+ when they have no link until they get link. Audio controllers can power
+ down when they aren't open, etc.
+ - Want to avoid having lots of scaffolding in device drivers. So we need
+ to come up with some models for some frameworks.
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