For reference, I'm seeing the same error messages (but only 4 of them) on an ASUS Z87-PRO (UEFI secure boot enabled) with current Debian testing (starting with 5.19.6-1, but also with 5.19.11-1).
The best explanation I could find is a post in a Lenovo forum https://forums.lenovo.com/topic/findpost/15028/5166897/5733178 So, it seems to happen if you have (a) Duplicate entries in the efi dbx revocation list (b) Linux kernel 5.19 I checked that out on my system: [0]$ dbxtool -l | awk '{ print $4 }' | sort | wc -l 278 [0]$ dbxtool -l | awk '{ print $4 }' | sort | uniq | wc -l 274 Indeed, 4 duplicates in dbx, and therefore 4 error messages! Personally, I think the error messages are a little bit "over the top" in that particular case. A warning such as "You have ... duplicates in the efi dbx revocation list" may be enough. I would not know, how to repair this with a pre-historic BIOS, anyway. Regards, Klaus
