Public bug reported:
Unless I use F10 and Select, I get “no bootable disk” message from my BIOS.
I’ve installed separate disks with other Op systems … no problems. (Ubuntu
20.04, Mint 20.1, Zorin 16, Fedora 35, etc). It seems UB install forces Uefi
options. Not good. I need Bios mode or legacy mode. I have disabled Uefi in my
bios.
The UB makes my disk install type GPF.
Unless I use F10 and select an option, I get a no bootable disk message
from my BIOS. If I press F10, when the screen says, "Please select boot
device", I can select the hard drive and the Ubuntu boot screen proceeds
normally.
Only 21.10, Budgie 21.10, and unsupported 22.04 show this problem. I’ve
installed separate disks with other operating systems without any
problems. Ubuntu 20.04, Mint 20.1, Zorin 16, and Fedora 35, all work
fine. I have disabled UEFI in my BIOS and I have also tried the
"Something Else" option during installation. I've followed the Ubuntu
Handbook for installation.
My hard drive has only 2 partitions: "sda1 core.img and sda2 ext4 /".
How can I boot Ubuntu without having to use F10 and select the
appropriate drive?
Using gdisk, I found that the disk was still in GPT mode in spite of my
changes. I then started over and using gparted created the following MBR disk
table:
Number Start (sector) End (sector) Size Code Name
1 2048 34815 16.0 MiB 0700 Microsoft basic data
2 34816 62543871 29.8 GiB 8300 Linux filesystem
3 62543872 96098303 16.0 GiB 8200 Linux swap
4 96098304 625141759 252.3 GiB 8300 Linux filesystem
I then did a fresh install of Budgie 21.10 and chose “something else”. I had to
bypass 5 error messages trying to convince me that EFI was missing. (I knew
that!) The install went normally and the computer boots and works perfectly.
Note: there is an option in gdisk to convert GPT to MBR but I couldn’t make it
work.
I also left the problem on the AskUbuntu site but have not gotten any replies.
I next tried it on Ubuntu 21.10. Works fine. This MSDOS table can be
much simpler: A 16MB boot partition and the rest an EXT4 root partition.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: installation mbr
** Summary changed:
- Ubiquity Bug: forces Uefi options. I need MBR not GPF.
+ Ubiquity Bug: forces Uefi options. I need MBR not GPT.
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https://bugs.launchpad.net/bugs/1960141
Title:
Ubiquity Bug: forces Uefi options. I need MBR not GPT.
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