Maybe, you should create an EFI partition. Typing "df", do you get something like

/dev/nvme0n1p1 973952     6184    967768   1% /boot/efi

(or perhaps /dev/sda1)?

Good luck, François

On 2/1/23 19:09, Clarence Fender wrote:
Xubuntu 22.04 to laptop, USB boot (~2yrs old, linux-specific)
"something else" disk part
sda is where everything goes except HOME
sdb/nvm_etc  is /HOME

Unable to install GRUB in /dev/sda
Executing `grub-install /dev/sda` failed
fatal error
--> Can't fix this, no matter what I do.

Spent a long time researching: common problem going back years. Seems to revolve around boot, legacy vs new. I haven't touched any boot settings. Tried different partitions and flags. Tried using sda1 instead of sda - same error.

sda   - all primary partitions
1M (appears by itself, no format)
500M  tried /BOOT and nothing
50G  ext4  /
16M swap
remainder of space ext4 but not mounted

sdb  ext4 /HOME

Is there a different sda partitioning I need? No data on it so no worries.
If I had hair, I'd be pulling it out.

Thanks.


--
François P. Rotzinger
Chemin des Vignes 20
CH-1373 Chavornay
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