No synaptic não tem algo parecido com gtk-engine-experience??
Se caso não tiver, adicione umas dessas linhas no seu source.list seguido de um: sudo apt-get update
deb http://benjamin.sipsolutions.net/debian stable main
deb http://benjamin.sipsolutions.net/debian experimental main
[]'s
Alyscom
fiz isso acima , no terminal fala isso :
ubuntu@fabretti-laptop:~$ deb
http://benjamin.sipsolutions.net/debian stable main
No command 'deb' found, did you mean:
Command 'debc' from package 'devscripts' (main)
Command 'derb' from package 'libicu-dev' (main)
Command 'dab' from package 'bsdgames' (universe)
Command 'debi' from package 'devscripts' (main)
deb: command not found
ubuntu@fabretti-laptop:~$ deb
http://benjamin.sipsolutions.net/debian experimental main
No command 'deb' found, did you mean:
Command 'debc' from package 'devscripts' (main)
Command 'derb' from package 'libicu-dev' (main)
Command 'dab' from package 'bsdgames' (universe)
Command 'debi' from package 'devscripts' (main)
deb: command not found
e no synaptic eu coloco pesquisa pacote ele acha o gtk-engine-experience , mais não tem nada dentro dele para instalar