Laptop Monitor doesn't Turn Off when Lid Closed

lmat · 2018-06-10 01:33:26

I'm running systemd, no desktop environment. After first installing Arch linux, any time I closed the monitor, the laptop would suspend. In /etc/systemd/logind.conf, I set HandleLidSwitch=ignore. This helped: the machine doesn't suspend when the lid closes, but the monitor doesn't turn off.
From other sources, it sounds like this is surprising behavior. I have another similar (slightly older) laptop wherein this configuration works as desired.

What configuration is necessary to get the laptop monitor to turn off without suspending the machine? Thanks!

seth · 2018-06-10 05:48:59

The "no desktop environment" will be the crucial part here - the monitor doesn't turn off magically.
Is this a display server (X11, wayland) or a linux console?
You could try the "lock" action (maybe it's smart enough to issue a setterm -powersave) but you might have to handle the lid key with a more versatile daemon (eg. acpid)

lmat · 2018-06-10 14:14:45

Just linux console; no display server. I did set this up on another computer, so if it requires magic, it shouldn't be hard to come by ;-) I'm sure i can force it using DPMS, etc. I'd rather for it just to work like it's supposed to, and I'm hoping I'm missing something obvious. Thanks!

seth · 2018-06-10 14:19:32

There's a chance that the UEFI/BIOS of the other system does this implicitly (rather operating on the backlight than on DPMS)
Try the "lock" mode, if that doesn't work, see https://wiki.archlinux.org/index.php/Acpid and "man setterm" on the --powersave parameters.

Arch Linux

#1 2018-06-10 01:33:26

Laptop Monitor doesn't Turn Off when Lid Closed

#2 2018-06-10 05:48:59

Re: Laptop Monitor doesn't Turn Off when Lid Closed

#3 2018-06-10 14:14:45

Re: Laptop Monitor doesn't Turn Off when Lid Closed

#4 2018-06-10 14:19:32

Re: Laptop Monitor doesn't Turn Off when Lid Closed

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