If the owner of the overlay is reading, I would be glad to get in touch with you, so this wonderful piece of hardware gets better support in Gentoo. I also have already submitted an update for libg15 to the official bug tracker. I will also attach my updated ebuilds. Feel free to use and spread them!
Hey mate. I am the maintainer of the gentoo overlay, though my work on it is ... spurious
I am currently trying to set up gnome15-0.8.3 to work. Unfortunately it shuts down as soon as it starts - seems it has something to do with the gtk2-gtk3 pygobject transition.
Anyway... I'll push the current state of the overlay to github on a separate branch - perhaps some other guy's snaky eyes can spot the python problem.
Thanks! It really helps having a debug log of the service starting up successfully.
It might also be that the more so-called "advanced" ebuilds are bringing in some feature that actually crashes, bringing the whole service down.
About that - I am unsure if you are a git afficionado, but perhaps we can collaborate via github on a better experience for gentooers with gnome15. I only own a G19 keyboard, so most of what I did for the other models is based on guesswork.
This leads me to another idea: could you try and switch temporarily to my overlay? If they work for you, then it's something either related to G19 vs G15, or something bad on my system. If they don't then I know I have to check out the ebuilds.