Some VCP feature lack possible-values when using ddcutil-service

[digitaltrails]

Due to a bug digitaltrails/ddcutil-service#27 vdu_controls may fail to correctly initialize metadata for some Non-Continuous values.

An example of a Non-Continuous is the Onscreen-Display-Language, which has a set of discrete/non-continuous values such as Chinese, English, French, ...

If you have been using ddcutil-service and think you have been affected by this bug, you have a couple of options:

1. You can remove the config file for the offending monitor from ~/.config/vdu_control/, and upgrade to ddcutil-service version 1.0.8+. After which vdu_controls will pick up the correct metadata and you can save a new config file.

2. Change vdu_controls settings to enable the ddcutil command instead of the DBUS ddcutil-service. As in 1, remove the offending config file from ~/.config/vdu_control/. Use vdu_controls to recreate the config. After the config is properly initialised it is safe to switch vdu_controls back to using ddcutil-service (even if the service still contains the bug).