Pkg xen devel - Jan 2019 - Bug#912592: Bug#912592: Xen stuck at boot "device-mapper: ioctl: …"

Hi,

Could it possibly be entropy starvation?

See:    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916690
        https://lists.debian.org/debian-devel/2018/12/msg00184.html

Can you try things like:

- attaching a mouse and moving it during boot

- installing haveged

- Use random.trust_cpu=on on kernel command line

- Include tpm-rng module in initramfs and allow kernel to use it by
  setting command line: rng_core.default_quality=1000

?

Cheers,
Andy