It's hard to say where fault lies exactly in terms of the bug itself. Except it's up to the distro maintainer to decide what software they include, test it, and

It's hard to say where fault lies exactly in terms of the bug itself. Except it's up to the distro maintainer to decide what software they include, test it, and ensure it works as expected along with the other pieces of software they decided to include. I don't know kernel stuff particularly well so maybe this is wrong, but presumably a GUI application, that lets you control other aspects of the OS, not working with the kernels own performance settings seems egregious if not also serious or "major".