Hi ,
I m currently working on a USB device driver in Linux 
(redhat kernel 7.1, 2.4.2-2).The USB driver
is carrying on the data transfer (ftp sessions)and i plug out the USB
device.my machine just freezes . I cant use mouse or keyboard . I have
to reset my PC .
However I am not able to produce this problem when i m 
carrying on the ftp sessions in the non-desktop terminals .
The problem happens inconsistently in the Gnome desktop 
environment.I say inconsistenly because sometimes even if 
i Plug out and Plug in the usb device several times during
ftp sessions the PC doesnt hang.The problem doesnt occur always.
Also I m unable to find whether there is some problem with the driver,
the Gnome environment or the host controller.
I m using the uhci controller.
Kindly let me know if anyone has some solution or a method 
where i can find where the problem lies.


Also i have debugged my driver. In the hang scenario the logs 
obtained show that the usb-drivers "disconnect handler" is completely
executed . Hence the control is outside the driver.

Regards,
Monali.






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