The support for the (brand new) video hardware
found in the XO-1.5 is still in teething stages -- this is why the
performance is bad. We've got the appropriate tickets open but it will
take us some time to get there.
I searched, but did not find tickets specifically addressing "poor
motion" nor "cursor flicker" on XO-1.5. Opened #9921 to make sure.
mikus