Здравствуйте, на линуксе совсем недавно и познания мои крайне скудны.
Так вот, проблема в том, что последнее изменение которое делал перед "роковой" перезагрузкой - выключал в compizconfig-settings-manager opengl и ещё что то.
после этого после включения чистый рабочий стол,т.е. как на окнах когда explorer слетает.что делать незнаю,очень надеюсь на помощь.
вот что говорит compiz --replace
Checking if settings need to be migrated ...no
Checking if internal files need to be migrated ...no
Backend : gconf
Integration : true
Profile : unity
Adding plugins
Initializing core options...done
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available
Initializing decor options...done
Initializing gnomecompat options...done
Initializing resize options...done
compiz (core) - Error: Plugin 'composite' not loaded.
Initializing place options...done
Initializing mousepoll options...done
Initializing move options...done
Initializing snap options...done
Initializing session options...done
Initializing vpswitch options...done
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
Setting Update "main_menu_key"
Setting Update "run_key"
Ошибка сегментирования (core dumped)