On 3/17/20 4:16 AM, Neil Bothwick wrote:
On Tue, 17 Mar 2020 03:00:59 -0500, Dutch Ingraham wrote:
Also from [1], with emphasis added "30_os-prober this script uses
**os-prober to search for Linux** and other operating systems and places
the results in the GRUB 2 menu.
A review of the scripts 10_linux and 30_os-prober supplied by Gentoo
with the grub and os-prober packages seems to confirm the Ubuntu
documentation's accuracy.
Regardless of which script is responsible, the problem remains that
running 'grub-mkconfig -o /boot/grub/grub.cfg' under the circumstances
outlined in my original post should find the other Linux operating
systems, but doesn't.
You're right, either things have changed since the days I used GRUB
extensively or I am losing it. No, that's not a multiple choice question!
Well, you wouldn't be the first to begin losing it! I sent the original
question before running things through strace, so.... (It wasn't
particularly helpful.)
Have you tried running the script with "sh -x" to see just what it is
doing?
It calls a helper script and exits successfully.
I wonder if it could be this part
if ! command -v os-prober > /dev/null || ! command -v linux-boot-prober
>/dev/null ; then
# missing os-prober and/or linux-boot-prober
exit 0
fi
Running `command -v os-prober' returns '/usr/bin/os-prober'
If the os-prober command is missing the script will fail successfully, as
you experience. Is sys-boot/os-prober installed?
Yes, it is installed as noted above, and, if I mount the partitions
manually, os-prober will find them.
I'm fairly certain I am missing one open and obvious thing, but can't
see it. Here is a list of things I have tried, mainly for
thread-completeness purposes:
1. Removed grub and op-prober packages then wiped all residual config files.
2. Reinstalled both, enabling the 'mount' use flag on grub.
3. Confirmed /usr/bin/os-prober and all /etc/grub.d/{scripts} are in
place and executable.
4. Even though it is the default, added GRUB_DISABLE_OS_PROBER=false to
/etc/default/grub.
5. Even though it is the default, set GRUB_PLATFORMS="pc" in make.conf.
On a fairly routine set-up (MBR/BIOS with four ext4 primary partitions)
I should be able to just set the mount use flag on grub, install grub
and os-prober, run 'grub-mkconfig -o /boot/grub/grub.cfg' and it should
just detect all operating systems and write the config, right? RIGHT?
