Blueshift is a bit broken in newer versions of X. If Blueshift is not working in X for you, you may need to change i_size = 2 ** 8 in sr/curves.py to i_size = 2 ** 10. However, this will break Blueshift in the TTY, so may want to change it to 2 ** 10 conditionally. A proper fix is on its way. If anyone have a multi-graphics card setup, testing of multiple graphics cards with DRM (in Linux TTY) is required.