Tady je ten výpis
   return self._weakref[key]
  File "/usr/lib/python3.2/weakref.py", line 69, in __getitem__
    o = self.data[key]()
KeyError: 'xserver-xorg-video-nouveau'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 103, in <module>
    app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 179, in __init__
    self.show_drivers()
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 1302, in show_drivers
    self.set_driver_action_status()
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 1326, in set_driver_action_status
    pkg = self.apt_cache[pkg_name]
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 185, in __getitem__
    raise KeyError('The cache has no package named %r' % key)
KeyError: "The cache has no package named 'xserver-xorg-video-nouveau'"