I think it could be a problem with power save for some usb-devices.
With my Canon Lide 25 i had the same problem.
This solution works for me:
Go to the file tlp. Path /etc/default/tlp . You need to have writing rights.
You will find the line USB_BLACKLIST=
Search for it. Here it’s line 178.
Here i wrote the USB-ID after USB_BLACKLIST. Then remove the #-sign.
Like this:
USB_BLACKLIST=04a9:2220
The USB-ID you will get with lsusb in terminal.
Save the file and re-plugin your scanner. Perhaps it’s working now.
(Sorry for my english, but i am from germany 
)