I have a post related to this in the hardware forum, no responses. Now I have done more looking and I think it may be a serious problem in Feisty.
I installed SANE, XSANE, etc for scanner. everything works!
However, when I start up Xsane, I get the initial screen of avaiable devices. I select my scanner, then there is about a one minute delay until Xsane continues.
Then, if I click on SCAN, there is another delay of about one minute before the scan starts.
For fun I went through the same steps with PCLOS which I also have installed and there are no delays.
I have some more info that points to a Feisty Kernel problem.
I ran xscanimage from terminal, get repeated messages "scanner warming up". Eventually after a minute or so, it starts.
I googled "scanner warming up xscanimage" and found several references to a problem in compiling the kernel libusb with USB_SUSPEND.
I don't understand all this, but it sure looks like this is my problem. I am hoping one of the experts here can take a look and comment. If true, I am desperate for a fix so I can use Mint. This is a killer problem for me.