Documentation and support
Information on how to get things running and overcome difficulties.
The Modicia OS website looks a bit messy, and the PDF manual is out of date. The development team offers support to users who make a donation. In short, there isn’t much free support and you have to seek documentation for the individual components rather than for Modicia OS itself.
As you might expect for an official Ubuntu flavour, Ubuntu Studio is extremely well documented, with extensive support options. For example, the documentation section has mini manuals on subjects such as using common Linux music tools and apps, and setting up audio hardware. One problem is that some of the documentation isn’t as up to date as it should be. There are real-time chat communities using the Matrix and IRC systems. In most situations, you can find the troubleshooting help you need by searching for regular Ubuntu solutions.
The Fedora Jam website includes a brief wiki that summarises the specific info about this spin compared to regular Fedora. There is an email mailing list and an IRC channel but it was almost empty. Fedora Jam doesn’t have much of a community.
Fedora Design Suite had a similar page of information, but this one had links to general art and design tutorials. The IRC channel seemed a bit healthier, with around 50 members. In the case of both Fedora-based spins, there was an adequate amount of basic information and support, but you’d probably have to do most troubleshooting via the mainstream Fedora resources.
The AV Linux site provides a page of information about the distro. There is also a 72-page PDF manual, which is kept up to date with the current distro version and covers various aspects of using the included apps and configuration tools. The manual is a feather in this distro’s cap. The MX Linux resources are the first stop for support questions when dealing with AV Linux.