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

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

Ok, Xserver 1.5 from experimental installed:
ii  xserver-xorg                         1:7.4~4
 the X.Org X server
ii  xserver-xorg-core                    2:1.5.2-1
 Xorg X server - core server
ii  xserver-xorg-video-radeon
1:6.9.0+git20081012.c0e6cb6d-1 X.Org X server -- ATI Radeon display
driver

I found that Xserver 1.5 didn't find my keyboard. Had to add
InputDevice "Generic Keyboard"	"CoreKeyboard"
to ServerLayout.

GNOME fonts seem very big too, at least comparing with Xserver 1.4
from lenny.  Icewease GUI fonts are big too, but webpage font
rendering is good.

Finally, although external monitor seems to be configured to 1360x768,
it is saying that mode is not compatible and I see nothing, so maybe
there's some problem with the refresh rate. I have tested to move a
big window around all virtual screen to see whether there is some A
area on LVDS, and there is not. xrandr confirms it:

Screen 0: minimum 320 x 200, current 2560 x 800, maximum 2560 x 1360
VGA-0 connected 1360x768+1200+0 (normal left inverted right x axis y
axis) 410mm x 256mm
   1360x768       60.0*+   59.8
   1152x864       60.0
   1024x768       75.1     75.0     70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3
   640x480        75.0     72.8     72.8     75.0     60.0     59.9
   720x400        70.1
None connected (normal left inverted right x axis y axis)
   1360x768       59.8
   1152x864       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*+
   1024x768       60.0
   800x600        60.3
   640x480        59.9


And a snippet from Xorg.0.log:
(EE) RADEON(0): Mode 1360x768+1280+0 does not fit virtual size
2560x1360 - offset updated to +1200+0

Maybe there's some kind of limit in 2560px width in the hw or driver?
Anyway this version only has produced a black external monitor :)


Tests with radeonhd driver:
ii  xserver-xorg-video-radeonhd             1.2.3-1
             X.Org X server -- AMD/ATI r5xx, r6xx display driver

Driver insisted puting 1360x768 on LVDS/PANEL, had to force 1280x800
in xorg.conf. Renamed VGA-0 to VGA_1, LVDS to PANEL.

Works flawlesly although system fonts seem a bit smaller than with
Xserver 1.4 (maybe this is a effect of viewing the bigs fonts with
radeon driver). No A nor B areas, external monitor shows perfect
image. xrandr:

Screen 0: minimum 320 x 200, current 2640 x 800, maximum 2640 x 2560
VGA_1 connected 1360x768+1280+0 410mm x 256mm
   1360x768       60.0*+   59.8
   1152x864       60.0
   1024x768       75.1     75.0     70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3
   640x480        75.0     72.8     72.8     75.0     60.0     59.9
   720x400        70.1
PANEL connected 1280x800+0+0 261mm x 163mm
   1280x800       60.0*+
   2560x2048Scaled   60.5
   2560x1600Scaled   60.5
   2048x1536      60.0
   2048x1536Scaled   60.5
   1920x1440      60.0
   1856x1392      60.0
   1792x1344      60.0
   1920x1200Scaled   60.4
   1920x1080Scaled   60.5
   1600x1200      60.0
   1600x1200Scaled   60.4
   1680x1050      60.0
   1680x1050Scaled   60.3
   1600x1024      60.2
   1400x1050      60.0
   1400x1050Scaled   60.3
   1440x960Scaled   60.4
   1280x1024      60.0
   1280x1024Scaled   60.5
   1440x900       59.9
   1280x960       60.0
   1280x960Scaled   60.4
   1280x854Scaled   60.4
   1360x768       59.8
   1152x864       60.0
   1280x720Scaled   60.4
   1152x768Scaled   60.3
   1024x768       60.0
   1024x768Scaled   60.4
   800x600        60.3     56.2
   800x600Scaled   60.3
   768x576Scaled   60.4
   854x480Scaled   59.8
   720x480Scaled   59.8
   640x480        59.9
   640x480Scaled   60.1
   320x240Scaled   57.6
   320x200Scaled   55.7

So definitely not a hw limit. Seems a radeon driver issue?

Thanks a lot.
Eneko