Alright. Time to write an update… I have installed Ubuntu Studio 24.04 with X11 on my Asus GR8, specs here: And oh boyNo problems whatsoever as far as color management is concerned. XNView MP, digiKam and darktable all work just as desired. Nvidia 750Ti (…reported as 860M for some reason? Who knows what’s inside, but it’s almost the same GPU, so whatever…) works out of the box apparently
I’ll be honest I was not expecting that… well, at least System Monitoring Center…
this will be relevant here too.
For now, thank you everyone for tips, I’ll play around in Ubuntu Studio and see how it goes.