right, please debug corresponding pieces. all of these goodies are userspace stuff, no kernel bug closing
And all these userspace pieces fiddle with kernel framebuffer. With this attitude everyone can blame somebody else for being buggy and nothing is ever solved.
It may be a bug in the kernel or in X that is triggered by a userspace program drawing on the kernel framebuffer. If the framebuffer was bug-free anybody could draw anything on it without any consequences which is certainly not the case here.
Regards Michal