NVIDIA: left KBUILD.
-> done.
-> Kernel module compilation complete.
ERROR: Unable to load the kernel module 'nvidia.ko'.  This happens most
       frequently when this kernel module was built against the wrong or
       improperly configured kernel sources, with a version of gcc that differs
       from the one used to build the target kernel, or if a driver such as
       rivafb/nvidiafb is present and prevents the NVIDIA kernel module from
       obtaining ownership of the NVIDIA graphics device(s).

       Please see the log entries 'Kernel module load error' and 'Kernel
       messages' at the end of the file '/var/log/nvidia-installer.log' for
       more information.
-> Kernel module load error: insmod: error inserting './usr/src/nv/nvidia.ko':
   -1 Invalid module format
-> Kernel messages:
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   VFS: busy inodes on changed media.
   ISO 9660 Extensions: Microsoft Joliet Level 3
   ISO 9660 Extensions: RRIP_1991A
   nvidia: version magic '2.6.22.9-1mdvcustom SMP mod_unload 686 ' should be
   '2.6.22.9-desktop-1mdv SMP mod_unload 686 '
ERROR: Installation has failed.  Please see the file
       '/var/log/nvidia-installer.log' for details.  You may find suggestions
       on fixing installation problems in the README available on the Linux
       driver download page at www.nvidia.com.