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List:       linux-usb-users
Subject:    Re: [Linux-usb-users] newbie: development board
From:       Guennadi Liakhovetski <gl () dsa-ac ! de>
Date:       2001-10-26 15:35:57
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> You can use /sbin/lsmod to see what drivers are loaded.

I am new to USB, not to Linux:-) At least I am not as new to Linux as to
USB:-)

> The HCD, together with the generic layer of the USB stack (usb.c and
> friends) does that. The device driver is not required to list the device
> in the /proc/bus/usb/devices. What the device driver does, once it
> claims some interfaces of a device, is that the driver's name is shown
> in (braces) next to the claimed interface in /proc/bus/usb/devices.

Yep, this is what I thought should be the case. Thanks.

> I assume you enabled verbose USB debugging in the kernel config, right?
> It dumps descriptors of newly connected devices into the kernel log.
> This is very useful if you do any USB development.

I'll check - I don't enjoy long logs:-)

> If your device is totally "invisible" and causes no changes anywhere
> then my guess would be that it is broken (or the cable is broken).
> That is because the USB detection is done electrically, by pulling one
> of data lines high or low depending on speed.

Most probably a wiring problem:-)

Thanks!
Guennadi
---------------------------------
Guennadi Liakhovetski, Ph.D.
DSA Daten- und Systemtechnik GmbH
Pascalstr. 28
D-52076 Aachen
Germany


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