Your OP was 1 year and 2months not 2 years old You have used mcetool to disable screen from turning off when plugged in?
apt-get install --reinstall libsysuid-screenlock-nokia.css
~ # apt-get install --reinstall libsysuid-scree nlock-nokia.css Reading package lists... Done Building dependency tree Reading state information... Done E: Couldn't find package libsysuid-screenlock-nokia.css ~ # ~ #