[NTLUG:Discuss] Where do USB devices appear these days?

Kevin Brannen kbrannen at pwhome.com
Wed Feb 1 23:28:34 CST 2006


steve wrote:

> I just recently upgraded to SuSE 9.3 from 9.1 and I find that my
> USB devices don't work like they used to.
>
> I'm a pretty dedicated command-line person - so I dislike pointy-clicky
> things.
>
> In the past, it was all very logical - I plugged in my camera or my
> USB thumb drive or hard drive - and a few seconds later, the device
> would be automounted in /media - easy.
>
> Now, one of about four things happens:
>
> 1) Nothing.
>
...

Understand, I'm not real thrilled about some of it either.  "Nothing" is 
what happens when I plug in my PDA with it's USB cable.  I don't know if 
you're having the same issue I did, but I can tell you what I did to 
fixed it.

If you do a "lsmod | grep usb", you should see 2 "*hci*" type modules 
referenced,  As I understand it, there's a uhci_hcd which is USB1, and 
an ehci_hcd which is USB2.  For a reasonably modern camera, I would 
think you'd be OK as it's probably using USB2.

But my PDA is just old enough, and apparently low budget enough, :-) 
that it's a USB1 device.  And while these 2 interfaces should peacefully 
co-exist, for me they conflict.  The only way I can make the PDA 
reliably recognized and accessable, is to put "rmmod ehci_hcd" in my 
/etc/init.d/boot.local (this is with Suse 9.2).  Admittedly, I'm also 
dealing with VMware to run the PDA software, but I had no (none, nada, 
zero, zilch, ...) trouble with this under 9.1.  I don't understand why 
we're taking a step backwards, but it is frustrating.

HTH in some way,
Kevin




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