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From: Kent Hauser <kent.hauser@verizon.net>
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Date: Sat, 16 Oct 2004 10:10:26 -1000
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Subject: Re: usb power turned off by X.org
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Hi,

Sorry my bug report fails the laugh test. I didn't find the problem funny 
either.

Here's how I determined X.org turns off USB power.

1) Palm charging from USB. LED goes off when I start X.
2) wireless mouse "base station" plugged into USB. power/activity LED goes off 
when I start X.
3) remove .xinitrc so that KDE not started. LEDs still off.
4) exit X. no power LEDs. reboot, LEDs re-light.

I've not seen anything on the mobile lists. A minimal workaround would be some 
way to turn USB power back on (and/or display status). My USB controller 
probes as follows:

Oct 16 08:57:59 kent kernel: usb0: <Intel 82801DB (ICH4) USB controller USB-A> 
on uhci0

Thanks. Kent



On Saturday 16 October 2004 09:46 am, Doug White wrote:
> On Fri, 15 Oct 2004, Kent Hauser wrote:
> > Hi,
> >
> > When I start X.org, the power on my USB ports is turned off.
>
> That makes no sense whatsoever. :)
>
> > "usbdevs -v"  still reports "self-powered". I can't figure a way to turn
> > it back on. Any thoughts?
>
> Thats not the same thing.  The power source of a device is fixed. I don't
> think you can view the active/inactive state of the port power.
>
> Does unplugging & replugging the device resurrect it?
>
> Do the video card and USB controller share an interrupt?
>
> > Hardware is Thinkpad T41 running -CURRENT as of 10/12.
>
> You might poke -mobile. T41s seem common, but also have lots of problems
> ...