Tente alterá-lo com dconf
(de dconf-cli
package):
dconf load / << EOF
[org/compiz]
current-profile='unity'
[org/compiz/profiles/unity/plugins/unityshell]
alt-tab-prev='Disabled'
launcher-switcher-prev='Disabled'
alt-tab-forward='Disabled'
launcher-switcher-forward='Disabled'
alt-tab-forward-all='Disabled'
alt-tab-prev-all='Disabled'
[org/compiz/profiles/unity/plugins/switcher]
prev-all-key='Disabled'
prev-key='Disabled'
next-all-key='Disabled'
next-key='Disabled'
[org/compiz/profiles/unity/plugins/staticswitcher]
prev-all-key='Disabled'
next-all-key='Disabled'
[org/compiz/profiles/unity-lowgfx/plugins/unityshell]
alt-tab-prev='Disabled'
launcher-switcher-prev='Disabled'
alt-tab-forward='Disabled'
launcher-switcher-forward='Disabled'
alt-tab-forward-all='Disabled'
alt-tab-prev-all='Disabled'
[org/compiz/profiles/unity-lowgfx/plugins/switcher]
prev-all-key='Disabled'
prev-key='Disabled'
next-all-key='Disabled'
next-key='Disabled'
[org/compiz/profiles/unity-lowgfx/plugins/staticswitcher]
prev-all-key='Disabled'
next-all-key='Disabled'
EOF
Notas:
- isso desativará todas as ocorrências da tecla Tab .
- no meu VirtualBox 16.04 O LTS tem dois perfis do Compiz - unidade e unity-lowgfx . Se tiver certeza de que você tem apenas unidade , você pode pular unity-lowgfx .
Você pode reverter para as configurações padrão com
dconf reset /org/compiz/profiles/unity-lowgfx -f
dconf reset /org/compiz/profiles/unity -f
faça o logout e faça o login novamente.