[sane-devel] Vertical Comb effect on Epson 2580 scan at 2400 dpi

[Oliver Schwartz]

Hi,

> I have an Epson Perfection 2580 Photo and when scanning at 50-1200
> dpi I get good scans, but when scanning at 2400 dpi I get a
> vertical comb effect. Every other line is shifted 4 pixels down.
>
> I know support for this scanner is still being worked on, but any
> ideas?

It's a known issue for both the 2480 and the 2580. See 
https://alioth.debian.org/tracker/index.php?func=detail&aid=300756&group_id=30186&atid=410366 

To be honest I've no idea how to fix it. A trace of the USB 
communication in windows may be helpful.

/Oliver