On Thu, Dec 29, 2022 at 21:48:46 +0100, Damien Boureille wrote: > # wsconsctl -d -w backlight=0 > wsconsctl: WSDISPLAYIO_PARAM_BACKLIGHT: Inappropriate ioctl for device > > # sysctl -a | grep acpi.acpi > hw.acpi.acpiout1.brightness = 50 > hw.acpi.acpivga0.bios_switch = 1 > > This works fine but only dims the display: > # sysctl -w hw.acpi.acpiout1.brightness=0 > > No other relevant variable seems available in sysctl.
Does screenblank(8) work? You can force the screen off imeediately with screenblank -b and unblank with screenblank -u Trying it from an ssh session first might be a prudent thing to do, or be ready to type the second command blindly :) -uwe