Hope this is the right place to ask.
I wanted to test the 2.9.5 version but i've an odd problem, that is i can't paint at all. The only thing that is leaving a stroke on the canvas is the calligraphy tool. The brush, pen, mypaint brush, airbrush, healing tool, clonig tool aren't working. Some other tools are working but not the ones i'm needing. I checked the opacity, mode, layer lock ect but everything was ok.
I'm using it in Fedora 26, XFCE desktop, all up-to-date.
If someone has an idea, i'm all ears.