I installed Ubuntu server 20.04 on old, damaged laptop. The problem is, that I can not close the cover - this is the "damaged" part of the problem.
Is there any way to turn off the screen via command line?
I found such solution:
sudo vbetool dpms off, but it does not work and returns error:
mmap /dev/zero: Operation not permitted Failed to initialise LRMI (Linux Real-Mode Interface)
How can I turn off the screen? Is it even possible with command line only?