Bug#332548: xserver-xorg: breaks dual-head on radeon: more info

[Dominique Dumont <domi.dumont@free.fr>]

Lionel Elie Mamane <lionel@mamane.lu> writes:

> Section "Device"
> 	Identifier	"ATI Radeon 9200 SE Primary"
> 	Driver		"ati"
> 	BusID		"PCI:2:0:0"
> #	Option		"CloneMode"	"1280x1024"
> #	Option		"CloneDisplay"	"0"
> 	Screen		0
> #        Option          "UseFBDev"              "true"
> 	Option		"MergedFB"	"false"
> #       Option		"DDCMode"	"true"
> EndSection

On my radeon 9200, forcing MergedFB to false breaks the video output
on the secondary head. (no signal at all on the video output).

But if I set it to true (which is the default value since I have a
monitor and a projector connected to my card), X display works fine.

HTH 

PS: In all cases, the VT (CTRL-ALT-F1 to CTRL-ALT-F6) are garbled: the
color and oveall layout is there, but the character are unreadable as
if each character display is individually (but similarly) mucked up.