Hi,
It looks like the recent Debian stretch updated kernel doesn't boot
under Xen:
<https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903767>
This also means that right now you cannot self-install Debian
stable.
If you reboot and experience this, you will need to boot back into
the previous kernel. I am investigating now if there is any quick
fix or workaround. In the mean time those affected should follow
that bug to know when it is resolved.
Cheers,
Andy
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