Update: Got all services to run, including qubes-gui-agent. Turns out the dependency it was failing on was meminfo-writer which was enabled in the /usr/lib/qubes/init/qubes-sysinit.sh script, but promptly disabled because it wasn't "checkmarked" in dom0's VM settings page.
That said, with all services running, still same behavior of getting no replies to "qvm-run --pass-io" nor does any qvm-run for executing commands, e.g., touch. qubes-db.service qubes-early-vm-config.service qubes-meminfo-writer.service qubes-mount-dirs.service qubes-qrexec-agent.service qubes-sysinit.service -- 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 email@example.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/5027edf3-e726-47c5-b75e-b6e95428baa7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.