Why do you need Xinerama ? And what is it ? The Xinerama extensions were introduced to the XFree86 system in version 4.0. Xinerama is an extension to XFree86 Release 6 Version 4.0 (X4.0) which allows applications and window managers to use the two (or more) physical displays as one large virtual display.
The beauty of the Xinerama extensions is that they are totally transparent to user space. Previously, applications could only reside on one of the displays and could not be moved between the two. Window managers had to be specially written to support the two displays. With Xinerama, window managers and applications don't have to be specially written to support the larger "Virtual Desktop" which Xinerama creates.
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You are strongly recommended to take a backup of your system before major installation and backups at regular intervals.
Much of the introduction and first sections are based loosely on a document submitted to me from Nico Schottelius <nicos -at- pcsystems.de>.
Also thanks to the many people who have emailed me with spelling tips, and suggestions. I have incorporated them whenever I could.
The wonderful disclaimer on the prior page is brought to us courtesy of the thousands of lawyers in this wonderful country who put their own greed over common sense.