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:
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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