I tried copying the Ubuntu ISO to dom0 instead of the standalone VM directly, because the standalone VM only finds things to boot from in dom0.
I have not received any messages from Qubes that this transfer does not work, but when I look in dom0, the Ubuntu file is gone. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/e446a267-6c3f-453d-8751-bb53c2f43aff%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.