Hi! 

Thanks ulm and fauli, here is a new version:

Title: xorg-x11-7.4 and xorg-server-1.5 kernel support
Author: Tobias Klausmann <klausman@g.o>
Content-Type: text/plain
Posted:
Revision: 2
News-Item-Format: 1.0
Display-If-Installed: x11-base/xorg-server
Display-If-Profile: default-linux/alpha
Display-If-Profile: default/linux/alpha

Recent versions of xorg's X11 require kernel support to access PCI and
AGP graphic cards. This support has only recently been added to the
Linux kernel (sys-kernel/vanilla-sources-2.6.30 and
sys-kernel/gentoo-sources-2.6.29-r5). Thus, you will need to run a
recent enough kernel to use recent versions of X11 on an alpha. If you
only start programs on your alpha, but the display is on another
machine, no upgrade is necessary.

Furthermore, not all graphics card drivers have been updated to work
with the newer X server API. One example is the glint driver used for
Permedia cards. The upstream developers have been informed about this,
but but no fixes are available yet, please see
https://bugs.freedesktop.org/show_bug.cgi?id=21546

For a general guide to upgrading to Xorg 1.5, see the Gentoo upgrade
guide:
http://www.gentoo.org/proj/en/desktop/x/x11/xorg-server-1.5-upgrade-guide.xml