ho finito il procedimento con il kernel 25-686.
agevolo il log di NVIDIA per un errore fornito in fase di installazione.
comunque ora sto usando il kernel nuovo con i driver nuovi. Ho dovuto solo modificare l'uscita audio. domani farò qualche prova in più. Grazie per l'aiuto. 'notte
codice:
-> Installing both new and classic TLS OpenGL libraries.
-> Parsing log file:
-> done.
-> Validating previous installation:
ERROR: File '/usr/lib/xorg/modules/extensions/libglx.so' is not a symbolic
       link.
-> done.
WARNING: Your driver installation has been altered since it was initially
         installed; this may happen, for example, if you have since installed
         the NVIDIA driver through a mechanism other than nvidia-installer
         (such as your distribution's native package management system). 
         nvidia-installer will attempt to uninstall as best it can.  Please see
         the file '/var/log/nvidia-installer.log' for details.
-> Uninstalling NVIDIA Accelerated Graphics Driver for Linux-x86 (1.0-16912
   (169.12)):
-> done.
-> Uninstallation of existing driver: NVIDIA Accelerated Graphics Driver for
   Linux-x86 (169.12) is complete.
-> Searching for conflicting X files:
-> done.
-> Searching for conflicting OpenGL files:
-> done.
-> Installing 'NVIDIA Accelerated Graphics Driver for Linux-x86' (173.14.12):
   executing: '/sbin/ldconfig'...
   executing: '/sbin/depmod -aq'...
-> done.
-> Driver file installation is complete.
-> Running post-install sanity check:
-> done.
-> Post-install sanity check passed.
-> Shared memory test passed.
-> Running runtime sanity check:
-> done.
-> Runtime sanity check passed.
-> Would you like to run the nvidia-xconfig utility to automatically update you
   r X configuration file so that the NVIDIA X driver will be used when you res
   tart X?  Any pre-existing X configuration file will be backed up. (Answer: Y
   es)
-> Your X configuration file has been successfully updated.  Installation of
   the NVIDIA Accelerated Graphics Driver for Linux-x86 (version: 173.14.12) is
   now complete.