Bug#503664: xserver-xorg-core: Dual head with Radeon HD3200 - heads partly overlay each other

["Eneko Lacunza" <enlar@enlar.net>]

Hi,

> Can you send the output of xrandr ? It looks like the server creates a
> 2560-wide virtual screen (1280x2) instead of 2840 (1440+1280). Can you
> check whether the width of A and B is 160px?

A and B are 160px. xrandr output:

Screen 0: minimum 320 x 200, current 2720 x 900, maximum 2560 x 1600
VGA-0 connected 1440x900+1280+0 (normal left inverted right x axis y
axis) 408mm x 255mm
   1440x900       60.0*+   60.2     59.9
   1600x1024      60.0
   1400x1050      60.0
   1280x1024      75.0     59.9     60.0
   1280x960       60.0     59.9
   1280x800       60.0
   1152x864       75.0     74.8
   1280x768       60.0
   1024x768       75.1     75.0     70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3     56.2
   640x480        75.0     72.8     72.8     75.0     66.7     60.0     59.9
   720x400        70.1
None connected (normal left inverted right x axis y axis)
   1280x800       60.0
   1280x768       60.0
   1024x768       60.0
   800x600        60.3
   640x480        59.9
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis)
261mm x 163mm
   1280x800       60.0*+   60.0
   1280x768       60.0
   1024x768       60.0
   800x600        60.3
   640x480        59.9

> Can you try with smaller resolutions ? For instance, 1024x768 on both
> screens.

Oddly enough, 1024x768 on both screens gives two clone screens (!). I
just modified Screen sections, forgive me if I did wrong:

Section "Screen"
	Identifier	"Screen portatil"
	Monitor		"Monitor portatil"
	DefaultDepth 24
 	SubSection "Display"
    		Depth 24
    		Modes "1024x768"
	EndSubSection
EndSection

Section "Screen"
	Identifier	"Screen externo"
	Monitor		"Monitor externo"
	DefaultDepth 24
 	SubSection "Display"
    		Depth 24
    		Modes "1024x768"
	EndSubSection
EndSection

Nautilus seems to have a bad time with this double 1024x1024
configuration, and does not load well... and after a while (maybe
after runing nautilus from Gnome menu?) external monitor goes black.
Not very sure, I'd had to double-check for this paragraph.

>>     Option     "RandRRotation" "true"
> This seems to be ignored.

Ok. Rotating seems to crash X anyway :)

>>     Option        "RightOf"    "LVDS"
> What if you switch monitor positions? (LVDS RightOf VGA-0, or VGA-0
> LeftOf LVDS, try both)

I tried  VGA-0 LeftOf LVDS, and A and B zones switched; A zone was on
leftmost of LVDS and B zone on rightmost VGA-0. Using LVDS RightOf
VGA-0 gives the same result as VGA-0 LeftOf LVDS.

Thanks a lot.
Eneko