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Old 02-05-2016, 06:57 AM   #16
linuxStudent11
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That link is really interesting. I've always used an unencrypted /boot. But that's not my issue here.

ok, I'll try the boot-repair utility. My friend is getting impatient.

Yes, the EFI partition is the first partition on the win10 disk. I'm currently wondering if I can move that around without invalidating the win10 license. (I had already shrunk the win10 partition (w/o problems), so I have extra space.) And my current main system is NOT a UEFI but the grub script uses UUID's to name the partitions to boot in each menu choice. So I guess I'm a GPT system.

So I built a separate test system on a leftover disk where the whole disk was encrypted lvm. And I tried to put the /boot on an external thumb drive. I could not get it to work.(?) But it works fine if the /boot partition is first on the encrypted lvm drive. And even more confusing, I can boot my main system FROM THAT SAME THUMBDRIVE (in a different menu choice). I don't understand how that can be. (maybe I should cut/paste?)

Ok, you talked me into it. I'll start playing with boot-repair.

Last edited by linuxStudent11; 02-05-2016 at 06:58 AM. Reason: more whitespace
 
Old 02-05-2016, 09:53 AM   #17
yancek
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Quote:
So I guess I'm a GPT system.
If you have windows 10 pre-installed, it is almost certainly using UEFI/GPT. You can check that, several methods are shown at the link below.

http://askubuntu.com/questions/38735...rom-a-terminal

I wouldn't "play" with the boot repair but post the output here so members can review it and make suggestions.
 
Old 02-15-2016, 01:57 PM   #18
linuxStudent11
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OK, I got my friend's encrypted debian to boot with EFI (!!!). Let me list the things that helped.
  1. rEFInd at http://www.rodsbooks.com/refind/ was a BIG help. It told me that /boot/efi/EFI/debian was completely empty. It also kept me from agonizing thru the msft boot manager every time something didn't work. https://wiki.debian.org/GrubEFIReinstall helped me install rEFInd.
  2. The wikipedia page https://en.wikipedia.org/wiki/Unifie...ware_Interface helped me understand what I was doing.
  3. The https://wiki.debian.org/GrubEFIReinstall page helped me populate /boot/efi/EFI/debian/ needed by the standard EFI boot loader. It also helps me abandon EFI cruft and go straight to an EFI version of GRUB.
  4. https://wiki.debian.org/EFIStub MAY have helped. But after the GrubEFIReinstall, it got moot.
Now I need to understand (and fix) grub asking for the disk passphrase TWICE(?).
I will list this as SOLVED even though I am not yet home free.

Oh, and I think I should apologize for putting all this Debian stuff into an Ubuntu forum. Maybe some admin should move this to a "Debian" forum?

Last edited by linuxStudent11; 02-15-2016 at 02:04 PM.
 
  


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