We recently had a lot of problems with Krita running on Ubuntu. So here is the up-to-date of list of things that you can do to fix your Krita experience on Ubuntu.
- Use proprietary graphics drivers. As I pointed out before there are some problems with LLVM and the drivers, which haven’t been fixed so far.
- Remove the qt-at-spi package The something broken with the package that causes crashes in the save dialog in some applications (bug here).
- Change the theme. The default theme Ubuntu uses for Qt applications is broken. Plastique and Oxygen themes are working better.