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*A computer running an ATI card may have problem in 3D effects on Feisty Fawn.

• The trick is that you have to force bery-core to use 0.2.0~0beryl1 because latter versions don't work with Xgl.
• This guide is from redDEAD

Check ATI Driver

• Install your ATI card driver (System-->Administration-->Restricted Driver Manager)
• Restart your computer
• In a terminal type:

$ fglrxinfo

You should see this ouputed on your terminal window like:

display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: RADEON XPRESS Series
OpenGL version string: 2.0.6334 (8.34.8)

Install Xgl & Beryl

Add the Beryl repositories to your source list. In a terminal type:

gksudo gedit /etc/apt/sources.list

Add this line to Your Source Lists

deb http://ubuntu.beryl-project.org/ feisty main

save and close file

Grab the Key for the repository, in a terminal type:

sudo wget http://ubuntu.beryl-project.org/[email protected] -O- | sudo apt-key add -

Update Your System. In a terminal type:

sudo apt-get update

Now install Xgl & Beryl; In a terminal type:

sudo apt-get install xserver-xgl beryl-ubuntu beryl-manager

Setting Up XGL

In a terminal type:

gksudo gedit /usr/local/bin/startxgl.sh

and this to the file:

#!/bin/sh
Xgl :1 -fullscreen -ac -accel xv:pbuffer -accel glx:pbuffer &
DISPLAY=:1
cookie="$(xauth -i nextract - :0 | cut -d ' ' -f 9)"
xauth -i add :1 . "$cookie"
exec dbus-launch --exit-with-session gnome-session

save and close file

Then make the xgl script executable by entering this into a terminal:

sudo chmod a+x /usr/local/bin/startxgl.sh

Creating a XGL Login

Make the script, by typing this into a terminal:

gksudo gedit /usr/share/xsessions/xgl.desktop

add this text to the file:

[Desktop Entry]
Encoding=UTF-8
Name=Xgl
Comment=Start an Xgl Session
Exec=/usr/local/bin/startxgl.sh
Icon=
Type=Application

save and close file

Change Your Repository Settings

In a terminal type:

gksudo gedit /etc/apt/preferences

Then add this ext to the file

Package: *
Pin: release o=lupine
Pin-Priority: 1000

save and close file

Update Your System. In a terminal type:

sudo apt-get update

Roll Back Beryl-Core

Downgrade beryl- core to a version that works with Xgl. In a terminal type:

sudo apt-get install beryl-core=0.2.0~0beryl1

Now You Just have to Log off and Log into your XGL session and run beryl (Applications-->System Tools-->Beryl Manager).

References pages

http://ubuntu1501.blogspot.com/2007/04/beryl-in-feisty-with-xgl.html