When I try to execute beryl I receive this error:


**************************************************************
* Beryl system compatiblity check                            *
**************************************************************

Detected xserver                                : NVIDIA

Checking Display :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: Support for non power of two textures missing
beryl: Failed to manage screen: 0
beryl: No manageable screens found on display :0