[xmonad] detecting multi-head and other newbie questions

[wagnerdm at seas.upenn.edu]

Quoting Mike Linksvayer <ml at gondwanaland.com>:

> http://www.haskell.org/haskellwiki/Xmonad/Frequently_asked_questions#Multi_head_or_xinerama_troubles
>
>    ghc -e Graphics.X11.Xinerama.compiledWithXinerama
>
> Output is True.
>
>    ghc -e "Graphics.X11.openDisplay [] >>=  
> Graphics.X11.Xinerama.getScreenInfo"
>
> Output is
>
>    [Rectangle {rect_x = 0, rect_y = 0, rect_width = 1280, rect_height = 800}]

Sounds like you should check into xrandr. Probably the right  
invocation will turn your other monitor on.
~d