Failed to access 'default_netvm' property

[Johnboy]

Hello,

I installed the mirage-firewall kernel and try to switch the “Default net qube” in “Qubes OS Global Config” to mirage-firewall.
The same error occurs on cmdline:

qubes-prefs -v default_netvm mirage-firewall
qubes-prefs: error: Failed to access 'default_netvm' property

This could be related to Installation error: sys-firewall / no internet

[palainp]

Hello, I’m sorry, I’m currently unable to reproduce your issue
Does that command works for other qubes that provides network (sys-firewall, sys-net, sys-whonix-gw, etc.)?

[Johnboy]

No, same error.
I cloned sys-net, deleted sys-net and ran qubesctl state.apply qvm.sys-net as mentioned here:

How to create new sys-net?

Well, you’ll also need to set “Net qube” to none,Mode to “HVM”, disable memory balancing, set “autostart”, adjust memory, and enable clock-sync. Then you’ll need to attach your NICs, and possibly configure strict reset. Alternatively, run : qubesctl state.apply qvm.sys-net I suggest you clone the exiting sys-net before deleting it. I never presume to speak for the Qubes team. When I comment in the Forum or in the mailing lists I speak for myself.

[Johnboy]

Unfortunately changing a net qube on the fly for a dispVM doesn’t work:

ERROR: Basic tab:
Failed to access 'netvm' property

Strange. Sometimes it works. Sometimes it doesn’t.
Sometimes it works with qvm-prefs, sometimes not -.-

[disclose-mushy]

Duplicate of #6799