Comment 364 for bug 129910

This is unrelated:

>Rebuilding the initramfs with vesafb, fbcon and vga16 results in a working framebuffer setup when started with video=vesafb vga=0X31A. However, one is left with a blinking cursor on an otherwise blank screen.
>A root login is possible and setupcon reveals a functional console at the desired resolution. Switching between ttys leaves one with a blank console again, setupcon brings it back.

I belive this is bug #201591 which is fixed and patches should go soon to repos.