What did I already try? (... As far as I remember ...)



Try 0A
	xserver standard;  xf86-video-ati standard  without ZaphodHead   - Xinerama
	config: with ServerLayout, two Screens linked into the ServerLayout
Result: Cloned displays - not useful

Try 0H
	xserver standard;  xf86-video-ati standard  without ZaphodHead   - Xinerama
	config: with ServerLayout, one Screen linked into the ServerLayout
Result: Abort of X before displaying anything ("No Screens found")

Try 0I
	xserver standard;  xf86-video-ati standard  without ZaphodHead   - Xinerama
	config: without ServerLayout, tho Monitor Sections with IDs "VGA-0" and
		"DVI-0" and RandR information defined
Result: Works as expected.



Try 0B
	xserver standard;  xf86-video-ati standard     with ZaphodHead
Result: Static configuration - Cloned displays - not useful
	[I've seen some misdetection in the logs.]
	But dynamically changeble by xrandr to expected configuration
Try 0Ba    also using "Screen" numbers in "Device" section           - Xinerama
Try 0Bb    not using "Screen" numbers in "Device" section            - Xinerama


Try 0C
	xserver mod (*);   xf86-video-ati standard     with ZaphodHead   - Xinerama
Result: Two seperate displays, but the VGA screen is always the primary one (and
	gets #:0.0)
	Config is robust against Screen number variations (in Display Section)

Try 0D
	xserver mod (*);   xf86-video-ati mod (**)     with ZaphodHead   + Xinerama
Result: Two seperate displays, works as expected :-)
	Problems with painting-speed.
	Screen numbers in Display Section have to match exactly ZaphodHead
		identifiers. (-> kernel order has to be matched.)

Try 0E
	xserver mod (*);   xf86-video-ati mod (**)     with ZaphodHead   - Xinerama
Result: Two seperate displays, works as expected :-)
	Problem: Split up in DISPLAY= :0.0 / :0.1  (I don't want that)
	Screen numbers in Display Section have to match exactly ZaphodHead
		identifiers. (-> kernel order has to be matched.)

Try 0F
	xserver standard   xf86-video-ati mod (*-)  without ZaphodHead   + Xinerama
Result: Need to define 3 displays (as HDMI out is #1); HDMI as "dummy"
	(Problems with painting-speed?)

Try 0G
	xserver mod (*);   xf86-video-ati mod (**)  without ZaphodHead   + Xinerama
Result: Two seperate displays, arrangable, but weired and sensible config (the
	exact order of mentioning the screens in ServerLayout matters)
	Problems with painting-speed.





The try numbers are not chronological.

mod (*) xserver:
simple return value from array in xf86Bus (see Bug description)

mod (**) xf86-video-ati:
use the "Screen" number in Device section to choose the kernel device (pretty
		old style) (Bug description referred to this mod.)

mod (*-) xf86-video-ati:
use some other number from some struct available to choose the kernel device
		(this was a mistake by me, but made a first It-works!-Experience)