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I would like to setup the dual monitor settings where I can use two monitors as a single Desktop with single panel, single launcher and when some programs are maximized then it should span both the monitors (i.e fullscreen over both the monitors)

I have ATI raedon graphics cards and after searching it in the internet I found that by configuring the xorg.conf file I can setup the settings that I want.

I have tried several ways to do it i.e

 using gksu amdcccle 

And setting MultiDisplay settings , but my requirement has not yet been met.

I have done this using Nvidia graphics but its seem that it doesnot work with ATI graphics card.

After searching for a while I found the link which gave me hope that it can be done in ATI as well , According to this link

xrandr must be disabled and AMD catalyst center will give the extra option of Big Desktop, to set it I used

 sudo aticonfig --set-pcs-str="DDX,EnableRandR12,FALSE"

Then I restart X as per that link

But this command gives this output to the stdout

SetPcsStr is exclusive, other options will not be used.

And I didnot find any extra configuration in my xorg.conf file.

And I didnt even get the Big Desktop option in the AMD Catalyst center's Display manager. There is still three options i.e

 Single Desktop
 Cloned Display
 Multiple Display
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What desktop environment and window manager? Some of these things depend on window manager support in particular. –  tripleee Jul 4 '13 at 4:30

1 Answer 1

Look for Xinerama X11 feature :

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Thank you @GHugo for the helpful links, those links helped me to learn more about Xinerama. But I could make the Xinerama to work only with Nvidia graphics card, I am not able to do this with ATI Radeon graphics card –  s.m Mar 23 '13 at 15:35
    
In the first on there is an xorg.conf for ati. Do you have any error ? –  GHugo Mar 23 '13 at 16:12
    
Yes GHugo I tried the xorg.conf file as per the first link, But it didnot work as it did with Nvidia, fullscreen was spanning over one monitor , but I want the applications to be fullscreen over both the monitors, I want to use both the monitors as a big monitor, I did this with Twinview setup and Xinerama in Nvidia but with ATI I am really confused why Xinerama is not working as per definitions.. –  s.m Mar 24 '13 at 15:16

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