For the last 2 hours I have been trying to get beryl working on my system. I have finally solved the problem and I have no blurred font, a 3D cube and acceleration, but just one question, each time I start at a terminal I see the error:

No GLXFBConfig

* Beryl system compatibility check *
************************************************** ************

Detected xserver : NVIDIA

Checking Display :0.0 ...

Checking for XComposite extension : passed (v0.3)
Checking for XDamage extension : passed
Checking for RandR extension : passed
Checking for XSync extension : passed

Checking Screen 0 ...

Checking for GLX_SGIX_fbconfig : passed
Checking for GLX_EXT_texture_from_pixmap : failed

No GLX_EXT_texture_from_pixmap
beryl: No GLXFBConfig for default depth, falling back on visinfo.
anc@orac:~$ beryl-manager
anc@orac:~$ ************************************************** ************
* Beryl system compatibility check *
************************************************** ************

Detected xserver : NVIDIA

Checking Display :0.0 ...

Checking for XComposite extension : passed (v0.3)
Checking for XDamage extension : passed
Checking for RandR extension : passed
Checking for XSync extension : passed

Checking Screen 0 ...

Checking for GLX_SGIX_fbconfig : passed
Checking for GLX_EXT_texture_from_pixmap : failed

No GLX_EXT_texture_from_pixmap
beryl: No GLXFBConfig for default depth, falling back on visinfo.
Sending reload event...
Sending reload event...
Sending reload event...




I'm not sure what the error means or if I'm missing any features, but Beryl appears to work, my card is a Sparkle Geforce 5700 Ultra

root@orac:/home/anc# lspci -vv | grep nVidia
01:00.0 VGA compatible controller: nVidia Corporation NV36.1 [GeForce FX 5700 Ultra] (rev a1) (prog-if 00 [VGA])


The Cure
I started beryl from a terminal, and the main problem each time was a garbled, display with distorte fonts and colours. Each time I could restart the x server with ctl-alt-backspace, to cut a long story short my xorg.conf was starting at 16bit colour depth. I changed the depth to 24 bit and now beryl works.
I will add an autorun entry for kde

This may help someone else, but thanks in advance for any views on the error message.