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Old 06-15-2008, 05:52 AM   #1
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turn usb power on off

Hello all,
I'm having trouble with a USB device, basically the only way I can get it to work is to unplug then replug the device. I've tried everything else rm mod the insmod kernel modules, setting udev rules, trying every possible combination of xorg.
So my only conclusion is the device firmware somehow doesn't sync untill x has fully booted. xorg log sort of backs this up by showing a driver error for the device if plugged in from boot, if I plug unplug there's no error.

So my only way out seems to be to turn power on off to the device to reset firmware. Is there any command that can do this. I'm using Debian Etch.
Old 06-15-2008, 06:26 AM   #2
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It might help if you gave us a hint of what kind of USB device is giving you trouble.
Old 06-15-2008, 07:05 AM   #3
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No way to power off the USB port that I know of. It would be more hardware and module specific to do so.

Old 06-15-2008, 09:11 AM   #4
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Originally Posted by bigrigdriver View Post
It might help if you gave us a hint of what kind of USB device is giving you trouble.
It's a microtouch touch screen, didn't say product as I didn't think it was relervant to turning a port off.

I should add /dev/bus....devices shows it, but dmesg doesn't until I unplug and plug in again. The it's show and works.

Last edited by knobby67; 06-15-2008 at 09:14 AM.


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