Re: Fighting for the power.
Alexander Motin <[email protected]>
| Newsgroups | gmane.os.freebsd.current,gmane.os.freebsd.devel.acpi,gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
Hans Petter Selasky wrote: >> 2. PCI devices >> PCI bus provides method to control device power. For example, I have >> completely no use for my FireWire controller and most of time - EHCI USB >> controller. Disabling them allows me to save about 3W of power. To >> disable all unneeded PCI devices you should build kernel without their >> drivers and add to loader.conf: >> hw.pci.do_power_nodriver=3 >> To enable devices back all you need to do is just load their drivers as >> modules. > > The new USB stack should turn off USB HC's automatically when not in use. At > least the schedules will get disabled. Did you do any research on this? Sorry, I really was testing it only with previous USB stack. Now I can acknowledge, that new ehci module loading adds only 0.2W for me by default and almost nothing if I power down built-in USB2 web cam connected to it using `usbconfig -u 5 -a 2 power_off`. Great! Thanks! -- Alexander Motin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[email protected]"