Your logs don't indicate that grub failed to install, or even that an
install was attempted. It looks like you just logged out. You mention
that you have tried both xenial and yakkety; when reusing a USB stick
for a different distribution or release, you need to format it first.
Did you do this?
** Changed in: ubiquity (Ubuntu)
Status: New => Incomplete
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install from live dvd - yakkety grub install fails
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