this is the jockey.log fille (/var/log/)

2011-06-12 02:51:02,067 DEBUG: loading custom handler /usr/share/jockey/handlers/nouveau3d.py
2011-06-12 02:51:02,224 DEBUG: Instantiated Handler subclass __builtin__.Nouveau3DHandler from name Nouveau3DHandler
2011-06-12 02:51:02,225 DEBUG: Experimental 3D support for NVIDIA cards is available
2011-06-12 02:51:02,225 DEBUG: loading custom handler /usr/share/jockey/handlers/fglrx.py
2011-06-12 02:51:02,330 WARNING: Invalid custom handler module /usr/share/jockey/handlers/fglrx.py
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/jockey/detection.py", line 930, in get_handlers
    execfile(mod, symb)
  File "/usr/share/jockey/handlers/fglrx.py", line 11, in <module>
    from NvidiaDetector.alternatives import Alternatives
ImportError: No module named NvidiaDetector.alternatives
...
2011-06-12 02:51:02,582 DEBUG: loading custom handler /usr/share/jockey/handlers/nvidia.py
2011-06-12 02:51:02,585 WARNING: Invalid custom handler module /usr/share/jockey/handlers/nvidia.py
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/jockey/detection.py", line 930, in get_handlers
    execfile(mod, symb)
  File "/usr/share/jockey/handlers/nvidia.py", line 12, in <module>
    from NvidiaDetector.nvidiadetector import NvidiaDetection
ImportError: No module named NvidiaDetector.nvidiadetector


Using nvidia current, the syslog shows:

Jun 12 01:50:29 desktop kernel: [  522.894111] nvidia: module license 'NVIDIA' taints kernel.
Jun 12 01:50:29 desktop kernel: [  522.894117] Disabling lock debugging due to kernel taint
Jun 12 01:50:29 desktop kernel: [  523.367644] NVRM: The NVIDIA probe routine was not called for 1 device(s).
Jun 12 01:50:29 desktop kernel: [  523.367649] NVRM: This can occur when a driver such as nouveau, rivafb,
Jun 12 01:50:29 desktop kernel: [  523.367650] NVRM: nvidiafb, or rivatv was loaded and obtained ownership of
Jun 12 01:50:29 desktop kernel: [  523.367651] NVRM: the NVIDIA device(s).
Jun 12 01:50:29 desktop kernel: [  523.367654] NVRM: Try unloading the conflicting kernel module (and/or
Jun 12 01:50:29 desktop kernel: [  523.367655] NVRM: reconfigure your kernel without the conflicting
Jun 12 01:50:29 desktop kernel: [  523.367656] NVRM: driver(s)), then try loading the NVIDIA kernel module
Jun 12 01:50:29 desktop kernel: [  523.367657] NVRM: again.
Jun 12 01:50:29 desktop kernel: [  523.367659] NVRM: No NVIDIA graphics adapter probed!

And the Xorg logs (note that I removed x-org-video-nouveau but I couldn't remove the kernel driver):

[    15.915] (==) Matched nvidia as autoconfigured driver 0
[    15.915] (==) Matched nouveau as autoconfigured driver 1
[    15.915] (==) Matched nv as autoconfigured driver 2
[    15.915] (==) Matched vesa as autoconfigured driver 3
[    15.915] (==) Matched fbdev as autoconfigured driver 4
[    15.915] (==) Assigned the driver to the xf86ConfigLayout
[    15.915] (II) LoadModule: "nvidia"
[    15.915] (WW) Warning, couldn't open module nvidia
[    15.915] (II) UnloadModule: "nvidia"
[    15.915] (II) Unloading nvidia
[    15.915] (EE) Failed to load module "nvidia" (module does not exist, 0)
[    15.915] (II) LoadModule: "nouveau"
[    15.916] (WW) Warning, couldn't open module nouveau
[    15.916] (II) UnloadModule: "nouveau"
[    15.916] (II) Unloading nouveau
[    15.916] (EE) Failed to load module "nouveau" (module does not exist, 0)
[    15.916] (II) LoadModule: "nv"
[    15.916] (WW) Warning, couldn't open module nv
[    15.917] (II) UnloadModule: "nv"
[    15.917] (II) Unloading nv
[    15.917] (EE) Failed to load module "nv" (module does not exist, 0)
[    15.917] (II) LoadModule: "vesa"
[    15.918] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so