No MergedXinerama for xrandr

Alex Deucher alexdeucher at
Sun May 31 19:02:31 PDT 2009

On Sun, May 31, 2009 at 6:49 PM, Quinn Harris <quinn at> wrote:
> Before many video drivers changed from MergedFB to xrandr 1.2 for a dual head
> video card they had an option like "NoMergedXinerama"
> for the Radeon driver that would make the two screens appear as one to the
> window manager.  Does a similar option exist somewhere now
> with xrandr 1.3?  Is there a way to completely disable a window managers
> awareness of multiple screens?
> I have a Viewsonic VP2290b that needs to be driven by two DVI ports to run at
> full resolution at a usable refresh rate (24hz).  But I
> don't want the desktop (KDE 4.2) to treat the single monitor like two in any
> way.

It's all handled in the common xserver code now for xrandr 1.2 rather
than in the drivers.  Your best bet is probably to turn off xinerama
support in your window manager.


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