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ATI docs says i need:

XOrg 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5 or 7.6

Xorg -version says:

X.Org X Server RC 2)
X Protocol Version 11, Revision 0
xorg-server 2:
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up vote 3 down vote accepted

It is a bit confusing, because the official documentation refers to the latest versions as X11R7.6 and XServer 1.9. Based on these numbers, you are running "X.Org 7.6" as your X.Org Server is at version

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ok, not as simple! just found out the hard way that ATI's catalyst drivers are NOT compatible with X11, even if it's technically "7.6" – gcb Dec 11 '11 at 7:14

You can take a look at the version reported in your packaging system, in Debian:

$ apt-cache show xserver-xorg | grep Version
Version: 1:7.5+8

In this example the version should be 7.5.

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in debian testing it's 2:1.11.something... i just wiped it out and am installing -stable. if i have any lucky with radeon card i will not miss much the awesomeness in -test. – gcb Dec 10 '11 at 5:14
I'd rather use dpkg -p xserver-xorg which shows what actually installed instead of the querying the remote. – Ciro Santilli 六四事件 法轮功 包卓轩 Jul 25 '15 at 10:49

Short answer: 7.6.

X is split up into separate repositories for each component since X11R7.0. The releases is a bunch of module versions known to work together and combined into one set. Individual components changes much more often.

The latest XOrg release, X11R7.6, included xorg-server 1.9.3.

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