Re: USB disconnects in 2.6.20-rc5 (but improved behaviour over earlier RCs)

On Mon, 05 Feb 2007 14:16:50 +1100, Matt Doran <[email protected]> wrote:

> So I'm not sure whether these disconnects are the fault of the hardware 
> or the USB layer, but I'd like to help track it down.  Is there anything 
> that I can do to help track down the cause of the disconnections?   Can 
> I enable some debugging that might help track down these issues? Or run 
> a difference kernel, etc.

I suppose you can run usbmon constantly and have it dumping the traffic
in a file, if your disk is big enough. Then if the device disconnects,
we'll see the preceeding traffic and may be able to make deductions.
Please look if your system has this file:
 /usr/share/doc/kernel-*/Documentation/usb/usbmon.txt

This is not guaranteed to work, because sometimes devices just disconnect
for no good reason, e.g. if they have bad power or a cables are not shielded
well. But I don't have better ideas.

-- Pete

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
[email protected]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel