Created attachment 102851 [details] (Video Example) (Krita 3.1.1 - Ubuntu 14.04) A minor glitch. Here're the steps I follow to reproduce it: 1) Restart Krita (important). 2) Go to: toolbar > "Choose brush preset" (the brush preset window will open). 3) Choose a brush preset. Actual Results: I can't choose any of the brush presets from the list. Expected Results: Choose the clicked brush preset.
This is a bug specific with Unity. I've had it a small forever, I am not sure what can be done about it at all.
Yes, wolthera is right. It's a problem with Ubuntu's default window manager -- if we don't get a click, we can't do anything. You might consider reporting the issue in Ubuntu's bug tracker.
Thanks for the hint on Unity!
Also reproducible here with AppImage + Ubuntu Unity 16.04-pre + NVidia GPU
It looks like the popup window is somehow not fully initialized. Mouse press events come to it (e.g. for the tags combo box) but the popup appears at the top-left corner of the screen. So I guess the problem is that the tablet coordinates are not translated correctly on the first run.