I've ripped out the diagonal summer scarf so many times.   Then something occurred to me last night.  I copies the pattern onto index cards (one row per card).....could I have miscopied something?   Yup.  As soon as I changed it things began to move along.   So here's a photo of the yarn I'm using.  It's Auracana

And here's the beginning of the scarf.....much more done now, but I don't have a photo of it.