I'd like to add myself into the mix here . . . with a recent apt update/upgrade in both Lu 20.04 and U-MATE 20.04 . . . "grub" and a few other packages were run and subsequently the visible grub page that shows my 5 linux installs was wiped . . . leaving only the ubuntu systems as bootable in my '12 MacPro.
I have a somewhat "complicated" set up with multi-booting OSX and linux in two out of three drives, but until this recent round of ubuntu updates I never had a GUI window open in the console saying, "grub doesn't know where to go, where should it go?" . . . and then having a "universal" effect on "grub" such that only ubuntu was showing from one EFI disk image. The first time I ran this I was in Lu 20.04 . . . and that busted up grub pretty good, had to get my SG2 disk out and after numerous reboots was able to find my way to an older OpenSUSE based grub window . . . and then I could boot the various other options . . . . But it was only after running the Lu upgrade that this problem happened. I posted to Lu-devel list serve . . . waiting for a reply on that one. To "fix" the problem I booted into Lu 20 and I chrooted over to the OpenSUSE filesystem Yast and used their os-prober . . . and rebooting a number of times I found that indeed "grub" was using the TW grub window and I was able to choose among a few of my systems. While I was doing that I rebooted into U-MATE 20.04 today and ran an apt update/upgrade and sure enough there again was "grub" and a few other "grub" packages . . . for scientific purposes I just ran it . . . and around 95% of the install, again the GUI window opened asking me, "Grub can't find itself, where do you want grub to go?" This time I checked all three of the options, and after finishing the upgrade I rebooted into OSX bootmanager and this time two out of three disks only booted U-MATE?????? So the ubuntu "grub" seems to be commandeering the controls and setting grub to just boot . . . itself??? >From the console in U-MATE 20 I repeated my maneuver of chrooting into TW and running the os-prober . . . once again I have a "main grub" menu . . . visible to my aging eyes. . . . Seems like there is some kind of issue working around through the various OSs using EFI boot and grub . . . I believe I had a similar issue over in TW a few months back, which is what got me to the "chroot" solution . . . and possibly in Siduction as well . . . problem still seems to be happening . . . . -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1863434 Title: 20.04 grub menu not visible To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1863434/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
