To anyone having trouble getting their excalibur to "wake-up" (come out of suspend mode).  This may be helpful:

https://dev1galaxy.org/viewtopic.php?pid=51609#p51609

    Try the following; in /etc/elogind/sleep.conf.d directory create the file 20-suspend.conf with the following contents

    [Sleep]
    SuspendMode=deep

    and reboot.

Can affirm that this fix worked on my virtual machine installation