No MergedXinerama for xrandr

[Bill Crawford]

Quinn Harris wrote:
...
> Something at the xserver level would be nice.  A global option or better yet a 
> way to instruct xrandr to treat two or more specified screens as one to all X 
> software.  This is basically another feature regression with xrandr and should 
> probably be considered to be resolved in a future revision.

Something that might be useful is also an option to "fake" multiple 
screens, such as splitting a large widescreen resolution into two tall 
display areas. There are Windows drivers that do this (no idea how).