https://bugzilla.kernel.org/show_bug.cgi?id=60523
--- Comment #28 from Christian Birchinger joker@netswarm.net --- Ok thanks.
I was just in the middle of posting this:
With 1280x1024 it switched to power level 0 but without "single_disp". With the really low 640x400 mode it did also use "single_disp".
But i now see that's no longer relevant.