Hi all Up to now, I have used either `vbetool dpms off` or `xbacklight -set 0` to turn off the display. On my system with a fresh install of Bulseye this fails: $ sudo vbetool dpms off mmap /dev/zero: Operation not permitted Failed to initialise LRMI (Linux Real-Mode Interface). $ sudo xbacklight -set 0 RANDR Query Version returned error -1 I'm working on the console (TTY) and am using Tmux, hence neither xset nor setterm work for me. Maybe someone can recommend a different approach, before I file a bug report :). Thanks Sebastian
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