tpr@tuli:~/temp/beryl/trunk/beryl-core/src$ ./beryl
XGL Absent, checking for NVIDIA
Nvidia Present
Relaunching ./beryl with __GL_YIELD="NOTHING"
XGL Absent, checking for NVIDIA
Nvidia Present
X Error of failed request: BadAccess (attempt to access private resource denied)
  Major opcode of failed request:  2 (X_ChangeWindowAttributes)
  Minor opcode of failed request:  0
  Resource id in failed request:  0x1a5
./beryl: Another window manager is already running on screen: 0
./beryl: No manageable screens found on display :0