On a multi-boot system you could have something like.
Boot Fedora
Ubuntu
Windows
And if you chose one of the linux options, then you'd get to pick which
of their kernels to boot.
I've never seen that on Fedora though, only on other distros. On
Fedora I've only seen a flat menu.
Boot Fedora <newest kernel number>
Fedora <next newest kernel number>
Fedora <oldest kernal number>
Windows
Stephen Morris:
Hi Tim,
The main difference with the sub-menus, if I assume your first menu
example is all sub-menus, is in front of the "Fedora" entry you get an
entry for the latest Fedora kernel to boot from, and the "Windows" entry
is not a sub-menu it is the actual "chain" entry to boot Windows.
It's a *very* long time since I had a multiboot system (on a laptop
that came with Vista installed), so my recollection isn't precise.
It was *like* my example. I can't remember if the Windows option was
straight Windows, it probably was. It probably handed over to the
Windows boot system which would have had its own normal/rescue boot
options.
If after a kernel install you don't run grub2-mkconfig you will
always get flat menus because either the BLSCFG option is active or the
menus are built by Grubby which has always ignored the sub-menu option
and only built flat menus.
All of that was automatic, I'd never messed with grub2-mkconfig,
grubby, et al, to modify things before or after any updates.
Hi Tim, yes, it was automatic and still is but that automatic process
doesn't do what I want so I use the facility that does, but as I've said
having BLSCFG active causes the sub-menu option in /etc/default/grub to
be ignored.
regards,
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FN:Stephen Morris
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