Thanks for the hint.

The commands I used to restore the entry were

efibootmgr -v -c -u -L Qubes -l /EFI/qubes/xen.efi -d /dev/sda1 -p 1

efibootmgr -o 0,1

Now I can boot Qubes using the UEFI boot manager again.


On 10/15/18 8:19 PM, 'awokd' via qubes-users wrote:


Stephan Marwedel:
I have a Thinkpad T470p which is equipped with two SSDs. Archlinux is installed on one drive and Qubes on the other. I use the UEFI Boot Menu to switch between operating systems without using multi-boot from a boot manager. Qubes 4.0 runs very well on this machine.

Since the T470p is now supported by the Linux Firmware Vendor Service I did the last BIOS update from Archlinux using fwupdmgr. Everything went smoothly. Unfortunately, after the update I was no longer able to boot Qubes because the UEFI boot configuration for the second drive was somehow deleted.

How can one recover the UEFI boot environment of Qubes 4.0? I tried using the Qubes installer but there is no shell access to run grub-install or efibootmgr. Can I do it from the Archlinux drive or a Fedora boot media?

Yes, Fedora boot media should work. Try searching this list for "efibootmgr"- should get the magic string for it in there somewhere.


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