Date: Sun, 21 Dec 2008 16:56:36 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-current@freebsd.org Cc: Rong-en Fan <grafan@gmail.com>, freebsd-usb@freebsd.org Subject: Re: USB power save, battery life and laptops - testers wanted Message-ID: <200812211656.38478.hselasky@c2i.net> In-Reply-To: <6eb82e0812200557o2700eb8ble49b5bb062693f85@mail.gmail.com> References: <200812201343.59663.hselasky@c2i.net> <6eb82e0812200557o2700eb8ble49b5bb062693f85@mail.gmail.com>
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Hi,
I need some help testing out my USB powersave implementation. There are now
multiple levels of USB power save:
1) Turn off USB controller schedules when there are no transactions (1-4
seconds, not tuneable)
2) Suspend actual USB device (30 seconds, tuneable)
Powersave is enabled by default.
Tuneables:
==========
How to set power save delay in seconds:
sysctl hw.usb2.power_timeout=10
How to disable power save for the given USB device:
usbconfig -u xxx -a yyy power_on
How to enable power save for the given USB device:
usbconfig -u xxx -a yyy power_save
Known to work:
==============
EHCI+UHCI
OHCI - not tested yet
How to install on FreeBSD -current (8.x)
========================================
svn --username anonsvn --password anonsvn \
checkout svn://svn.turbocat.net/i4b
cd i4b/trunk/i4b/src/sys/dev
cp -r usb2 /sys/dev/
make -C /sys/modules/usb2 clean all install
--HPS
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