Switching on/off 5V power to a USB port
I just got a little USB powered fan and it sure would be nice if I could have cron on my FreeBSD box turn it on or off at certain times by switching off the 5V line on a USB port. Anyone know how I can do that? Thanks. BTW this is a pretty decent fan for the money. :) http://www.amazon.com/gp/product/B0033WSDOM/ -- Ron McDowell San Antonio TX ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: Switching on/off 5V power to a USB port
On Tue, 2012-04-03 at 17:13 -0500, Ron McDowell wrote: I just got a little USB powered fan and it sure would be nice if I could have cron on my FreeBSD box turn it on or off at certain times by switching off the 5V line on a USB port. Anyone know how I can do that? Thanks. BTW this is a pretty decent fan for the money. :) http://www.amazon.com/gp/product/B0033WSDOM/ The usbconfig(8) command has power_on and power_off commands. I've never used them so I can't say for sure they'll do what you want. -- Ian ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
RE: Switching on/off 5V power to a USB port
-Original Message- From: owner-freebsd-curr...@freebsd.org [mailto:owner-freebsd- curr...@freebsd.org] On Behalf Of Ron McDowell Sent: Tuesday, April 03, 2012 3:14 PM To: freebsd-current Subject: Switching on/off 5V power to a USB port I just got a little USB powered fan and it sure would be nice if I could have cron on my FreeBSD box turn it on or off at certain times by switching off the 5V line on a USB port. Anyone know how I can do that? Thanks. Alternatively, you could just plug your USB fan into your monitor. A fellow engineer and I discovered that most monitors power-down the USB ports when entering power-save mode (with Dell, HP, and Viewsonic, this is whenever the screen blanks due to inactivity; are you using DPMS and/or greensaver?). Walking away from the PC will cause the fan to [eventually] turn off, while waggling the mouse brings it back to life. BTW this is a pretty decent fan for the money. :) http://www.amazon.com/gp/product/B0033WSDOM/ We didn't have a USB powered fan, so we actually wired an internal case-fan to the 5V lead and went that route. Nice fan though. -- Devin _ The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you. ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: Switching on/off 5V power to a USB port
In message 4f7b761b.4030...@fuzzwad.org, Ron McDowell writes: I just got a little USB powered fan and it sure would be nice if I could have cron on my FreeBSD box turn it on or off at certain times by switching off the 5V line on a USB port. Anyone know how I can do that? Thanks. I have only found very few USB ports where it was possible to reliably control power with a published interface. Most USB-controllers support doing it, but most motherboards don't mount the necessary FET. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: Switching on/off 5V power to a USB port
On 4/3/12 5:26 PM, Ian Lepore wrote: On Tue, 2012-04-03 at 17:13 -0500, Ron McDowell wrote: I just got a little USB powered fan and it sure would be nice if I could have cron on my FreeBSD box turn it on or off at certain times by switching off the 5V line on a USB port. Anyone know how I can do that? Thanks. BTW this is a pretty decent fan for the money. :) http://www.amazon.com/gp/product/B0033WSDOM/ The usbconfig(8) command has power_on and power_off commands. I've never used them so I can't say for sure they'll do what you want. -- Ian The good news is that usbconfig -u 4 -a 5 power_off|power_on works fine. Hardware is a Dell Latitude D-430 notebook running: FreeBSD d430 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r232714M: Fri Mar 9 12:41:34 CST 2012 rcm@d430:/usr/obj/usr/src/sys/GENERIC amd64 When booting up, the fan powers up just as: uhub7: vendor 0x413c product 0xa005, class 9/0, rev 2.00/25.07, addr 5 on usbus4 shows up, which was a pretty good clue to what device it is. Automatically turning it on is pure laziness on my part... turning it off is more about forgetfulness though. :) On 4/3/12 5:45 PM, Devin Teske wrote: Alternatively, you could just plug your USB fan into your monitor. A fellow engineer and I discovered that most monitors power-down the USB ports when entering power-save mode (with Dell, HP, and Viewsonic, this is whenever the screen blanks due to inactivity; are you using DPMS and/or greensaver?). Walking away from the PC will cause the fan to [eventually] turn off, while waggling the mouse brings it back to life. Devin, sorry, my monitor is too old to have USB ports on it...if it did that would be even a better solution. Thanks for the help everyone! -- Ron McDowell San Antonio TX ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
