Ok you are right it gets only broken with usplash. But sisfb does not brake up completely. The vesafb is unusable then. sisfb only doesn't show any usplash output.
seems to be a usplash issue -- Usplash breaks vesafb https://launchpad.net/bugs/61718 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs