https://bugs.freedesktop.org/show_bug.cgi?id=28440
--- Comment #6 from coomasiehead@yahoo.com 2010-06-08 22:26:15 PDT --- No.... vesafb was not likely a problem. I specified vga=791 as a global option in /etc/lilo.conf, and it caused the problem. After I replaced vga=791 with video=800x600, KMS started working again.
Whether vesafb handles the control over to KMS well should be tested since I didn't test it.