Are you able to connect the laptop via ethernet? If so, you might try something 
like?

1. Boot in rescue mode.
2. chroot
3. systemctl mask lightdm # this will prevent X from starting
4. Boot in Qubes (without X11)
5. Update kernel using qubes-dom0-update, ideally to the one from 
current-testing (e.g., qubes-dom0-update 
--enablerepo=qubes-dom0-current-testing kernel.

I am not 100% sure with the commands etc., I am writing them by heart.

Alternatively, you could try booting Qubes with kernel from Fedora 25. I don't 
recommend using it this way (Qubes adds some hardening for kernel), but it 
might be useful for booting in Qubes in order to install newer kernel from 
repositories.

Regards,
Vít Šesták 'v6ak'

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