Re: [new-usb] - USB_ERR_NO_POWER on keyboard hub

On Monday 18 May 2009, Renato Botelho wrote:
> I have a Sun USB Type 7 keyboard, and this keyboard has an USB hub
> with 3 ports on it. I'm using one of those 3 ports to plug the mouse and
> it's working fine.
>
> uhub5: 4 ports with 3 removable, bus powered
> ugen0.3: <Alcor Micro> at usbus0
> ums0: <Alcor Micro USB Mouse, class 0/0, rev 1.10/51.27, addr 3> on usbus0
> ums0: 3 buttons and [XYZ] coordinates ID=0
> ugen0.4: <Sun Microsystems> at usbus0
> ukbd0: <Sun Microsystems Type 7 USB keyboard, class 0/0, rev
> 2.00/1.04, addr 4> on usbus0
> kbd2 at ukbd0
>
> When I tried to plug a pen drive on anothe one, I got this:
>
> usb2_set_config_index:531: power exceeded 500 > 100
> usb2_set_config_index:531: power exceeded 500 > 100
> usb2_alloc_device:1755: Failure selecting configuration index 0:
> USB_ERR_NO_POWER, port 2, addr 5 (ignored)
> ugen0.5: <ALi Corp.> at usbus0
> pid 3705 (hald-probe-usb2-dev), uid 0: exited on signal 11
> ugen0.5: <ALi Corp.> at usbus0 (disconnected)
>
> usb2_set_config_index:531: power exceeded 500 > 100
> usb2_set_config_index:531: power exceeded 500 > 100
> usb2_alloc_device:1755: Failure selecting configuration index 0:
> USB_ERR_NO_POWER, port 1, addr 5 (ignored)
> ugen0.5: <ALi Corp.> at usbus0
> pid 3886 (hald-probe-usb2-dev), uid 0: exited on signal 11
> ugen0.5: <ALi Corp.> at usbus0 (disconnected)
>
> I'm using FreeBSD 8.0-current r192140.
>
> Let me know if there is more information i need to provide.
>
> Thanks

Hi,

Your Keyboard HUB technically does not allow current consumption above 100mA 
per port. Your memstick reports it needs 500mA. Probably you can hack around 
it, but then your hardware might break ...

--HPS