I'm having an issue not being able to boot Ubuntu after upgrading from 18.04 to 20.04. I've attached an image of what happens when I try, and that screen doesn't change.
I'm on a 2013 Macbook air triple booting Win 10, Ubuntu, and macOS.
Whoops, I should have been more clear. It's not a bootcoup, I've been using refind for many years now, have dealt with boutcoups galore. In this case, After reinstalling refind, macOS and Windows 10 both boot fine from the refind boot menu,. The screen I posted comes up after selecting Ubuntu from refind.
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Kind of a bazaar update, after not being able to boot into Ubuntu, I was finally (accidentally) able to boot into Ubuntu. I was attempting to install macOS onto an external USB drive using a seperate USB installation drive. After I formatted the target drive and selected it for install, the computer rebooted a few minutes later, and on reboot I was greeted by the Ubuntu encryption password prompt! It should have booted into the new installation of macOS on the external target USB disk, but somehow it went to the internal Ubuntu partition. I tried several times, each time it went to Ubuntu. So the bad news is that I can't install macOS on an exernal drive, but the good news is I now have a workaround, if not a bit clumsy, to get into Ubuntu.
Any thoughts? Not sure if this is useful in any way for develepers or anyone else. If nothing else happens, i guess I'll just have to live with this strange situation going forward...
Last edit: Mac P 2020-07-22
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I'm having an issue not being able to boot Ubuntu after upgrading from 18.04 to 20.04. I've attached an image of what happens when I try, and that screen doesn't change.
I'm on a 2013 Macbook air triple booting Win 10, Ubuntu, and macOS.
Any help would be appreciated.
Read up on this: http://www.rodsbooks.com/refind/bootcoup.html
Whoops, I should have been more clear. It's not a bootcoup, I've been using refind for many years now, have dealt with boutcoups galore. In this case, After reinstalling refind, macOS and Windows 10 both boot fine from the refind boot menu,. The screen I posted comes up after selecting Ubuntu from refind.
Kind of a bazaar update, after not being able to boot into Ubuntu, I was finally (accidentally) able to boot into Ubuntu. I was attempting to install macOS onto an external USB drive using a seperate USB installation drive. After I formatted the target drive and selected it for install, the computer rebooted a few minutes later, and on reboot I was greeted by the Ubuntu encryption password prompt! It should have booted into the new installation of macOS on the external target USB disk, but somehow it went to the internal Ubuntu partition. I tried several times, each time it went to Ubuntu. So the bad news is that I can't install macOS on an exernal drive, but the good news is I now have a workaround, if not a bit clumsy, to get into Ubuntu.
Any thoughts? Not sure if this is useful in any way for develepers or anyone else. If nothing else happens, i guess I'll just have to live with this strange situation going forward...
Last edit: Mac P 2020-07-22
What Mac and GPU are you using?
Is the Startup Manager not usable (press Option key at startup)?
Read some stories about troubleshooting startup issue:
https://sourceforge.net/p/refind/discussion/general/thread/609d70956e/
https://sourceforge.net/p/refind/discussion/general/thread/3108cd57fe/
They'll at least show ways to gather info.
I was able to boot into Ubuntu by changing some install options.
https://egpu.io/forums/thunderbolt-enclosures/blackmagic-egpu-pro-firmware-update-tool-on-macos/paged/8/#post-83033