#1101326 grub-common: Cannot switch back from UEFI to Legacy Mode

Package:
grub-common
Source:
grub-common
Description:
GRand Unified Bootloader (common files)
Submitter:
scorpio
Date:
2025-03-25 20:36:02 UTC
Severity:
normal
#1101326#5
Date:
2025-03-25 18:33:42 UTC
From:
To:
Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
   * What was the outcome of this action?
   * What outcome did you expect instead?

*** End of the template - remove these template lines ***
#1101326#10
Date:
2025-03-25 19:11:22 UTC
From:
To:
The BIOS is probably trying to boot from the wrong disk.

You can install GRUB on the hard disk, let the machine boot
automatically and, if it shows the GRUB menu, enter grub shell and check
the output of 'ls'. If it shows hd0 (the boot disk) with one partition
and hd1 with 5 partitions, then it means that it booted from the hard disk.
#1101326#15
Date:
2025-03-25 20:32:23 UTC
From:
To:
GRUB works on either disk as long as the BIOS boots from that disk
(manually with the SSD, automatically with the HDD). Here, it seems that
the BIOS automatically tries to boot from the HDD for whatever reason.
Did you check the disk order in the BIOS legacy boot settings ?

Did you check this ?