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

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Eneko Lacunza wrote:
> This is on a HP Pavilion TX2500 (2530es).
> I've attached an external monitor via VGA port, with 1440x900 res.
> Laptop screen is 1280x800.
> Graphics chipset is integrated ATI Radeon HD3200.
>
> Dual head works (no crashes...), but leftmost 1/8th of laptop screen
> is "overwritten" by rightmost content on external monitor, and
> likewise
> rightmost 1/8th of external monitor gets "overwritten" by leftmost
> content on laptop screen.
>   

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?

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

>     Option     "RandRRotation" "true"
>   

This seems to be ignored.

>     Option        "RightOf"    "LVDS"
>   

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

Brice