Qubes 4.3rc2: qubes-global-config failes to open

User Support Testing Release
1

Hi,
when I try to start cubes-global-config from dom0 terminal it failes to start but gives me some error messages. How can I try to repair this?
After installation of V4.3rc2 the config menue worked just fine, but then I did some tinkering with Auto Attach Settings and the menue failed to open.
Reboot didn’t help.

Thanks for any hints!

$ qubes-global-config 
Traceback (most recent call last):
  File "/usr/lib/python3.13/site-packages/qubes_config/global_config/global_config.py", line 304, in do_activate
    self.perform_setup()
    ~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/site-packages/qubes_config/global_config/global_config.py", line 426, in perform_setup
    self.handlers["attachments"] = DevAttachmentHandler(self.qapp, self.builder)
                                   ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/qubes_config/global_config/device_attachments.py", line 987, in __init__
    self.auto_attach_handler = AttachmentHandler(
                               ~~~~~~~~~~~~~~~~~^
        builder=gtk_builder,
        ^^^^^^^^^^^^^^^^^^^^
    ...<5 lines>...
        edit_dialog_class=AutoDeviceDialog,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/lib/python3.13/site-packages/qubes_config/global_config/device_attachments.py", line 921, in __init__
    super().__init__(
    ~~~~~~~~~~~~~~~~^
        prefix=prefix,
        ^^^^^^^^^^^^^^
    ...<3 lines>...
        edit_dialog_class=edit_dialog_class,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/lib/python3.13/site-packages/qubes_config/global_config/device_widgets.py", line 260, in __init__
    self.load_current_state()
    ~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/site-packages/qubes_config/global_config/device_attachments.py", line 963, in load_current_state
    aw = AssignmentWrapper.new_from_existing(assignment_list)
  File "/usr/lib/python3.13/site-packages/qubes_config/global_config/device_attachments.py", line 671, in new_from_existing
    device = assignments[0].device
             ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/qubesadmin/device_protocol.py", line 1370, in device
    raise ProtocolError("No devices matches to assignment")
qubesadmin.device_protocol.ProtocolError: No devices matches to assignment
2

If you added a persistent attachment via Qubes Global Config, then you will need to connect the device for it to work again. Until this issue is resolved, remove the rule you have set.

3

Thank you, great idea!

So I’m trying to remove a rule. First problem: I don’t know which rules I have set.
qvm-device --help says:
command
assign (s) Assign device to domain or edit existing assignment

But how do I list all of my assignments to choose one of it for deletion?

$qvm-device usb assign
responds with:
qvm-device DEVICE_CLASS assign: error: the following arguments are required: VMNAME, BACKEND:DEVICE_ID

so no list of assignments. Where do I find this list?

4

Found it:

$ qvm-device usb list --assignments

5

The patch provided by Marta should also work, once you replace except ProtocolError: with except:

6

Thank you!

Now that I got my list of assignments reconnecting the missing USB device did the trick. Qubes-global-config did start again and I was able to remove my rule there. Looks like I have to be a little more careful using this precious helper now. But I’m looking forward to having auto-assign fully functional some day.