Finally Ubuntu + Beryl + Xgl on i915

What I did for this:

1. Added this repositories to /etc/gdm/sources.list

deb http://yakablog.info/share/ubuntu dapper main
deb http://www.beerorkid.com/compiz/ dapper main
deb http://xgl.compiz.info/ dapper main
deb http://ubuntu.compiz.net/ dapper main
deb http://www.beerorkid.com/compiz dapper main aiglx
deb http://media.blutkind.org/xgl/ dapper main aiglx

2. Imported those GPG keys

#wget http://www.beerorkid.com/compiz/quinn.key.asc -O - | sudo apt-key add -
#wget http://www.beerorkid.com/compiz/quinn.key.asc -O - | sudo apt-key add -
#wget http://media.blutkind.org/xgl/quinn.key.asc -O - | sudo apt-key add -

3. Upgrade my distributio to latest release

#apt-get upgrade
#apt-get dist-upgrade

4. Install the following packages:

# apt-get install xserver-xgl libgl1-mesa xserver-xorg libglitz-glx1 beryl emerald-themes emerald

4. Edit the file /etc/gdm/gdm.conf
4.1 in section [server] change the line:

 
0=Standard

into

0=Xgl

4.2 add trhe section [server-Xgl] with the following content:

[server-Xgl]
name=Xgl server
command=/usr/bin/Xgl :0 -fullscreen -ac -accel glx:pbuffer -accel xv:pbuffer
flexible=true

5. In the file /etc/X11/xorg.conf
5.1 edit the section "Module" to have the following content

Section "Module"
        Load    "i2c"
        Load    "bitmap"
        Load    "ddc"
        Load    "dri"
        Load    "extmod"
        Load    "freetype"
        Load    "glx"
        Load    "int10"
        Load    "type1"
        Load    "vbe"
EndSection

5.2 edit the section "Device" to have the following content

Section "Device"
        Identifier      "Intel Corporation 82915G/GV/910GL Express Chipset Family Graphics Controller"
        Driver          "i810"
        BusID           "PCI:0:2:0"
        Option          "DRI" "true"
EndSection

5.3 Check for the sections "DRI" and "Extensions" - if you do not have them add them to this file with this content

Section "DRI"
        Mode    0666
EndSection

Section "Extensions"
        Option  "Composite" "true"
EndSection

6. In the menu System->Preferences->Sessions go to "Startup programs" tab and add the applications:

beryl-xgl
and 
emerald

7. Restart your X server.

In the System->Preferences you should have now two more entries "Beryl settings" and "Emerald"



Enjoy!!!