Unfortunately, not better with 64 bit Ubuntu 14.04.5 LTS.
I really think it's a bios problem like on this case :
I think Acer need to fix the bios on this product but how long it will take.
Anyway, I know Linux is not officialy supported but it looks like strange that Acer never tried to boot just one time with a linux usb key on this product. So i'm still waiting for someone who success.