[sane-devel] Epson Perfection1640: Slide scan fails: does the 1640SU support slides?

[ael]

On Tue, Nov 09, 2021 at 04:47:34PM +0100, Wolfram Sang wrote:
> SANE_DEBUG_EPSON2=<value> xsane

Looking at the older epson.c, 
static const SANE_String_Const film_list[] = {
  SANE_I18N ("Positive Film"),
  SANE_I18N ("Negative Film"),
  NULL
};

Could it be simply that the 1640 doesn't have a slide option? Could that
be true of all the B8 group?