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Subject: Re: Lenovo Y570 backlight
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Yes, I did. Some values can be changed like 'hw.acpi.video.lcd0.brightness',
others don't like 'hw.acpi.video.lcd0.active'. The brightness is max in all
cases.

#kldload acpi_video

#sysctl hw.acpi.video
hw.acpi.video.crt0.active: 0
hw.acpi.video.lcd0.active: 0
hw.acpi.video.lcd0.brightness: 70
hw.acpi.video.lcd0.fullpower: 70
hw.acpi.video.lcd0.economy: 30
hw.acpi.video.lcd0.levels: 70 30 10 17 23 30 40 50 60 70 80 90 100
hw.acpi.video.ext0.active: 0
hw.acpi.video.crt1.active: 0
hw.acpi.video.lcd1.active: 0
hw.acpi.video.lcd1.brightness: 70
hw.acpi.video.lcd1.fullpower: 70
hw.acpi.video.lcd1.economy: 30
hw.acpi.video.lcd1.levels: 70 30 10 17 23 30 40 50 60 70 80 90 100
hw.acpi.video.ext1.active: 0
hw.acpi.video.ext2.active: 0
hw.acpi.video.ext3.active: 0
hw.acpi.video.ext4.active: 0
hw.acpi.video.ext5.active: 0

#sysctl hw.acpi.video.lcd0.active=1
hw.acpi.video.lcd0.active: 0 -> 0
#sysctl hw.acpi.video.lcd0.brightness=30
hw.acpi.video.lcd0.brightness: 70 -> 30
#sysctl hw.acpi.video.lcd1.active=1
hw.acpi.video.lcd1.active: 0 -> 0
#sysctl hw.acpi.video.lcd1.brightness=30
hw.acpi.video.lcd1.brightness: 70 -> 30



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