R4.1 is installed on internal ssd. UEFI boot menu does show Qubes OS as well as the internal disk. Selecting Qubes OS returns to the Uefi boot menu. Selecting the internal disk I am not seeing a failure message but the grub command line. On the grub cmd line entering configfile (hd0,gpt1)/ offers…

Can you compare the IDs in the grub.cfg to the IDs of the Qubes OS 4.2 install on external SSD? Maybe the GRUB config from external Qubes OS 4.2 installed on external SSD was installed on your Qubes OS 4.1. partition for some reason. You can save a copy of grub.cfg just in case and then replace gr…

Cannot boot R4.1 after installing R4.2 on external ssd

User Support

apparatus April 25, 2024, 1:00pm 2

Did you try to boot like this?

You can also try to boot from another Qubes OS or from Qubes OS installer and check/fix your EFI entries using efibootmgr tool.