On Thu 13 Apr 2017 at 10:58:10 -0500, Richard Owlett wrote: > On 04/12/2017 01:49 PM, songbird wrote: > > > > another thing you can do is construct your own > >menu entry and put it in /etc/grub.d/40_custom file > > I don't see that being informative for this problem.
Quite the opposite; this is a very useful suggestion. Imagine that update-grub didn't give you something workable. You would (or should) be glad of the opportunity to roll your own. I do it all the time with removable devices. In your case, if grub-install had given you a "root=" line in a stanza it is possible you would not be booting the SD card. A 40_custom file needn't have it in. -- Brian.