Hello, The origin of the problem was discovered. This is a bug of powertop v.2.8-1 + b2. By uninstalling software everything works except the energy saving of the battery of my laptop ;( It's possible for you to make a urgent report for a urgent upgrade from powertop to the members Debian and Intel Team's development ?? The current version is 2.11 : https://01.org/powertop/ And your versions is 2.10 on SID : https://packages.debian.org/search?keywords=powertop If you need help for more details or tests feel free to send me an e-mail. I dare to hope for a quick fix from you. Best regards. Philippe
