The xen-hypervisor package needs to have better EFI-awareness added to its postinstall scriptlet, similar to the kernel packages which use efibootmgr.
As it is right now, it assumes EFI users also use grub, but my system does not. By simply installing the package and rebooting, I end up booting the old version: [user@dom0 ~]$ rpm -q xen xen-4.6.3-22.fc23.x86_64 [user@dom0 ~]$ xl dmesg | head -1 Xen 4.6.1-20.fc23 -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/CABQWM_B8x8BnKG0aS9K9j6MeU3vBLjZbefiB6m8%2B7TdGyT--Ew%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
