Just installed aiglx and beryl on Arch and thought it was working fine. After restarting X, I get the wobbly beryl splash screen but then the screen goes all white.
I ran glxinfo and get Direct Rendering not enabled.
dmesg says DRI not supported.
Ive got Intel 82845 graphics chip with 8MB of shared memmory -- I know its a very basic setup.
I read on the freedesktop.org that DRI also has some thing that will run using a software compatibility layer.
Anyone got any suggestions for this or should I just forget about it ?

Got everything working finally. Here's how I did it if anyone else searches for it.
Since I use ArchLinux, commands are relative to it, modify as necessary.

1>Install latest xorg
pacman -Sy xorg
2> Install beryl
pacman -Sy beryl-svn-gnome (or beryl-svn-kde)
pacman -S beryl-svn-extras
3> Increase the amount of video ram for your card by editing the line -
Section "Device"
Identifier "Intel 82845 ...."
Driver "i810"
VideoRam 32768 (this was originally at just 8MB)
4> Edit the appropriate lines in xorg.conf to get the following stuff in it -
Section "Module"
Load "glx"
Load "dri"
EndSection

Section "Device"
Option "XAANoOffscreenPixmaps" "true"
Option "DRI" "true"
EndSection

Section "ServerLayout"
Option "AIGLX" "true"
EndSection

Section "Extensions"
Option "Composite" "Enable"
EndSection

5> Add the two commands to the gnome sessions, startup entries -
beryl-xgl
beryl-manager
6> Reboot/restart X server and voila, a wobbly beryl diamond should welcome you. In the gnome notification area, you will see the gnome settings diamond icon, right click to configure stuff.

Apparantely, even if my display card took physically just 8MB, I could set a higher value in the xorg.conf file. This will work only with the latest x.org/xfree86.

This link helped a lot as well - http://lists.debian.org/debian-user/.../msg02592.html