Configuring Multiple Display Devices on One X Screen

[JohnW_57]

Multiple display devices (digital flat panels, CRTs, and TVs) can display the contents of a single X screen in any arbitrary configuration. Configuring multiple display devices on a single X screen has several distinct advantages over other techniques (such as Xinerama):

    A single X screen is used. The NVIDIA driver conceals all information about multiple display devices from the X server; as far as X is concerned, there is only one screen.

    Both display devices share one frame buffer. Thus, all the functionality present on a single display (e.g., accelerated OpenGL) is available with multiple display devices.

    No additional overhead is needed to emulate having a single desktop.

More here at:  http://us.download.nvidia.com/XFree86/Linux-x86_64/302.17/README/configtwinview.html#metamodes
http://us.download.nvidia.com/XFree86/Linux-x86_64/302.17/README/configmultxscreens.html

JohnW

[Archie]

Thanks for the tip, JohnW. Most of the time, except for the really special cases, configuring a user's video card thru PCC is effortless and uneventful. What I miss most, which KDE dropped is Xinerama on Twinview. I miss the days when a single wallpaper would be across two monitors giving one a feeling that the two are somehow connected as one.

Nowadays is not so bad either, and it is quite understandable that trade offs had to be made.