Strange USB Scaner Problem

[Loïc Martin]

norman a écrit :
> , snip >
> 
>> Random disconnection is a kernel bug that is not fixed yet. Some users
>> report randomly disconnecting USB devices, especially external hard
>> drives. One solution is to start the system with the option "irqpoll" in
>> grub, but this doesn't work for everybody, and is believed to make the
>> whole system slower. The other solution is to disable USB 2.0. This will
>> result in way slower read/write, but the connection remains stable.
>>
>> To disable USB 2.0, type this in the terminal:
>>
>> sudo modprobe -r ehci_hcd
>>
>> Test if the copy/write process is stable, and if you want to disable USB
>> 2.0 upon boot, type:
>>
>> sudo sh -c 'echo blacklist ehci_hcd > /etc/modprobe.d/blacklist-ehci'
>> sudo update-initramfs -u -k `uname -r`
>>
>> </quote>
> 
> I tried this but it did not work for me. The bar indicated that scanning
> was taking place but the scanner light did not move.
> 
> Norman
> 
> 
I think that's quite an accurate description of 
https://bugs.launchpad.net/debian/+source/linux-source-2.6.20/+bug/85488

Did you try the scanbutton solution explained in the bug? It works for 
some people.