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BazziteB
Bazzite•2y ago•
127 replies
adumer

No Windows Boot option (CSM/Legacy BIOS)

Installed bazzite-nvidia and have lost the boot option for windows.

After looking around I've tried the following:

1.
ujust regenerate-grub
ujust regenerate-grub

This outputs the following, which is also missing finding the windows boot option
Generating grub configuration file ...
Adding boot menu entry for UEFI Firmware Settings ...
done
Generating grub configuration file ...
Adding boot menu entry for UEFI Firmware Settings ...
done


2. Checking if I've accidentally deleted the windows boot partition.
I was trying to be very careful about this, and i can still see all the partitions windows had from before i installed.
sda      8:0    0 931.5G  0 disk 
├─sda1   8:1    0    50M  0 part /var/home/<user>/mnt/sda1
├─sda2   8:2    0 805.9G  0 part 
├─sda3   8:3    0   100M  0 part /var/home/<user>/mnt/sda3
├─sda4   8:4    0   517M  0 part /var/home/<user>/mnt/sda4
...(bazzite partitions)...
sda      8:0    0 931.5G  0 disk 
├─sda1   8:1    0    50M  0 part /var/home/<user>/mnt/sda1
├─sda2   8:2    0 805.9G  0 part 
├─sda3   8:3    0   100M  0 part /var/home/<user>/mnt/sda3
├─sda4   8:4    0   517M  0 part /var/home/<user>/mnt/sda4
...(bazzite partitions)...


Also, I've mounted some of the partitions and can see Windows files
<user>@bazzite:~/mnt/sda3/EFI/Microsoft/Boot$ ls *.efi
bootmgfw.efi  bootmgr.efi  memtest.efi  SecureBootRecovery.efi
<user>@bazzite:~/mnt/sda3/EFI/Microsoft/Boot$ ls *.efi
bootmgfw.efi  bootmgr.efi  memtest.efi  SecureBootRecovery.efi


Also some boot looking things in sda1
<user>@bazzite:~/mnt/sda1$ ls
'$RECYCLE.BIN'   bootmgr   BOOTNXT   BOOTSECT.BAK   Recovery   Recovery.txt  'System Volume Information'
<user>@bazzite:~/mnt/sda1$ ls
'$RECYCLE.BIN'   bootmgr   BOOTNXT   BOOTSECT.BAK   Recovery   Recovery.txt  'System Volume Information'


I'm not sure what else to check, anyone have any further ideas?
Solution
So the issue (i believe) was I had left CSM/Legacy BIOS enabled without realising it and bazzite installed non-efi. Because windows was EFI it was not visible in the non-efi grub menu.

Updating the BIOS so that i could disable CSM/Legacy BIOS (and Secure Boot which was also not present in my earlier bios version) meant i could reinstall bazzite using grub-efi.
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