USB-Keyboard through an USB-Switchbox

USB-Keyboard through an USB-Switchbox

[Otto Wyss]

I'm using now again a second computer with a single USB keyboard through 
an USB switchbox. Switching between computers is equivalent to connect 
and disconnect the USB keyboard rather often. After this 
disconnect/connect I still happen to experience times when the USB stack 
can't synchronize again, leaving me without access to the computer 
(kernel 2.6.12-9). I since I've mentioned this already several years ago 
I though this might be solved but it seems Linux isn't able to build a 
state-of-the-art USB stack which is able to synchronize in _each_ case.

Is there anything I can do to help find out why the USB doesn't work? Is 
there a log anywhere on they system?

O. Wyss

-- 
Cross-platform: http://wyoguide.sf.net/index.php?page=Cross-platform.html

Re: USB-Keyboard through an USB-Switchbox

[Greg KH]

On Fri, Apr 28, 2006 at 09:25:50PM +0200, Otto Wyss wrote:
> I'm using now again a second computer with a single USB keyboard through 
> an USB switchbox. Switching between computers is equivalent to connect 
> and disconnect the USB keyboard rather often. After this 
> disconnect/connect I still happen to experience times when the USB stack 
> can't synchronize again, leaving me without access to the computer 
> (kernel 2.6.12-9). I since I've mentioned this already several years ago 
> I though this might be solved but it seems Linux isn't able to build a 
> state-of-the-art USB stack which is able to synchronize in _each_ case.
> 
> Is there anything I can do to help find out why the USB doesn't work? Is 
> there a log anywhere on they system?

The kernel log can be seen by running 'dmesg'.  Also, try using a newer
kernel version, 2.6.12 is over a year old.

And, if 2.6.16 still has problems, please let the people at the
linux-usb-devel mailing list know about it.

thanks,

greg k-h