[Gllug] USB hacking

[Jack Richards]

Quick question... is anybody out there familiar with the USB implementation of 
2.4.21 or greater 
 
I have a device that only works when plugged in to a running system.  
 
Its not a hotplug/cold plug issue.  The problem is that its detected if 
already plugged in at boot, the device is recognised, but doesn't power up. 
 
All entries in /proc/bus/usb are correct. 
 
When unplugged and plugged in, it does power up and functions fine. 
 
This is not a driver issue ( IFAIK ) since its not loading a driver for the 
device ( its a symbol scanner ) 
 
Its getting to the point where it looks like I will have to hack some of the 
USB code in kernel to rectify this behaviour. 
 
The problem is I know little about the USB implementation and need some  quick 
Q and A from somebody who knows how it all hangs together. 
 
Any takers ? 
 
Regards, 
 
Jack Richards  
  
GNU Solutions Ltd  
Atlantic House  
Imperial Way   
Reading  
Berks.  
RG2 0TD  
  
web   : www.gnu-solutions.com  
email : jack at gnu-solutions.com  
Office: +44 (0)845 89 00 767  
DDI   : +44 (0)845 89 00 767 ext 4001  
Mobile: +44 (0)7788 437 904  
Fax   : +44 (0)871  277 1937  
  
*******************************************************************************  
*  
  
  
  
THIS MESSAGE IS INTENDED ONLY FOR THE USE OF THE INDIVIDUAL OR  
ENTITY TO WHICH IT IS ADDRESSED AND MAY CONTAIN INFORMATION THAT IS  
PRIVILEGED, CONFIDENTIAL AND EXEMPT FROM DISCLOSURE.    
  
If the reader of this message is not the intended recipient, or an   
employee or agent responsible for delivering the message to the intended   
recipient, you are hereby notified that any dissemination, distribution   
or copying of this communication is strictly prohibited.    
  
If you have received this communication in error, please accept our apology.  
We should be obliged if you would email them by return.  
  
Thank you.  
-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug