Re: UEFI/"BIOS" booting, was Re: USB Install Fails, Complains about CD-ROM
Chris Ramsden wrote:
> On 2018-05-14 01:21, songbird wrote:
>> Pascal Hambourg wrote:
>> ...
>>> I agree with the author. If you want to keep the existing EFI Windows
>>> installation and have a convenient dual boot with GRUB, you'll have to
>>> set up your favourite distribution to boot in EFI mode. If you want to
>>> go back to legacy boot, including for Windows, you'll have to
>>> repartition the disk to MSDOS format and reinstall Windows.
>> all i know is that if your bios doesn't boot in
>> UEFI mode and you don't know anything about what this
>> means you can end up installing Debian without UEFI
>> support and then it can be rather fun to get it back.
>>
>> i managed to have grub do an install to a stable
>> partition without UEFI and i messed up the testing
>> setup i had. it took me some while to figure out
>> what went wrong and how to fix it. if you don't
>> really understand grub rescue commands and there
>> isn't a working system you can use to connect and
>> find help for the commands you need to enter it's
>> very frustrating.
>>
>> the Debian UEFI pages helped a great deal but
>> there were other things i had to figure out coming in
>> cold to UEFI.
>>
>> how to create a /boot/efi partition, what goes in
>> it, mounting it, clearing and putting in new efibootmgr
>> entries, etc.
>>
>> refind was useful and at least it does what i expect
>> it to do. grub, i dislike how it assumed things i
>> didn't want to do. alas, i didn't know how different
>> UEFI was from bios mode.
>>
>> i still haven't redone my efibootmgr entries but
>> refind doesn't care, i can create custom entries in
>> that config file and they work that is all i really
>> need at this point.
>>
>>
>> songbird
>>
> Hmm, do you have any useful references?
https://wiki.debian.org/UEFI
https://wiki.debian.org/GrubEFIReinstall
and
http://www.rodsbooks.com/refind/
> I got a new Dell computer, shrunk the existing partitions down and
> successfully installed grub2 and got a windows10/Linux multi boot using
> grub. Then later I tried to upgrade my Linux and soon found that I was
> getting error messages about grub not being able to find necessary
> features on the boot device.
yep. do not install stable after testing is all i
can recommend at this point (based upon my experience)
and of course keep a working/verified netinst image
handy.
> I tried to rebuild it with a clean install of Windows 10, reasoning that
> if I could get it back to the original configuration, I could repeat the
> original exercise. But alas, no, it remains stubbornly unable to install
> grub2 alongside the windows bootloader. I got it to a state where I
> could use the BIOS POST boot screen to choose a boot option, but this
> wasn't the original successful arrangement where grub offered me the
> Linux/windows loader choice.
>
> I gave up, wiped windows and went through with a clean Linux install. I
> don't really want windows that much, but it irks me that I haven't been
> able to fathom out how to return to the original state in which it was
> shipped. Your words hint at many things I became vaguely aware of but
> totally failed to grasp. The other posters to this thread have at least
> reassured me that it isn't easy or trivial to get right.
i was rather surprised by it all but i'd been living
in the dark ages for years anyways.
songbird
Reply to:
- References:
- USB Install Fails, Complains about CD-ROM
- From: Kent West <westk@acu.edu>
- Re: USB Install Fails, Complains about CD-ROM
- From: songbird <songbird@anthive.com>
- Re: USB Install Fails, Complains about CD-ROM
- From: Kent West <westk@acu.edu>
- Re: USB Install Fails, Complains about CD-ROM
- From: Pascal Hambourg <pascal@plouf.fr.eu.org>
- Re: USB Install Fails, Complains about CD-ROM
- From: Kent West <westk@acu.edu>
- UEFI/"BIOS" booting, was Re: USB Install Fails, Complains about CD-ROM
- From: David Wright <deblis@lionunicorn.co.uk>
- Re: UEFI/"BIOS" booting, was Re: USB Install Fails, Complains about CD-ROM
- From: Pascal Hambourg <pascal@plouf.fr.eu.org>
- Re: UEFI/"BIOS" booting, was Re: USB Install Fails, Complains about CD-ROM
- From: songbird <songbird@anthive.com>
- Re: UEFI/"BIOS" booting, was Re: USB Install Fails, Complains about CD-ROM
- From: Chris Ramsden <chris.ramsden@gmail.com>