peut etre ajouter dans le config.txt : hdmi_ignore_cec_init Doesn't sent initial active source message. Avoids bringing (CEC enabled) TV out of standby and channel switch when rebooting. => hdmi_ignore_cec_init=1 hdmi_ignore_cec Pretends CEC is not supported at all by TV. No CEC functions will be supported. => hdmi_ignore_cec=1