From BIOS I selected an entry named “Install firmware compatible with your device” (Gerätekompatible Firmware installieren - German original title). The laptop then installed some Webcam firmware very quickly. Another try with fwupdmgr then shows no more updates available. I suppose this BIOS menu entry somehow found the stuff previously downloaded into EFI/HP/DEVFW
This is still to prove whenever the next fwupdmgr should fail…
Steps will then be:
- select this BIOS menu entry and pray stuff gets installed
- boot from live usb and use efibootmgr to recreate link to Linux Bootmanager like
sudo efibootmgr --create --disk /dev/nvme0n1 --part 1 --label "Linux Boot Manager" --loader "\\EFI\\systemd\\systemd-bootx64.efi" - optionally change bootorder with efibootmgr