I noticed an old post in PyCharm regarding the same problem. I recently switched back to Linux from Mac. I'm currently running openSUSE Tumbleweed, so it's bleeding edge but mostly stable build of KDE. If I stick with bundled runtime I get the result shown in the embedded image. I also tried using openjdk-11 and openjfx which was not installed by default but no luck with that either, IDE says no preview is available with that configuration. Anybody have some ideas before I download the Oracle JDK and use it in lieu of the bundled runtime. I'm not sure why either config is not working.