Control intel backlight on FreeBSD (and OpenBSD)
openbsd

Document incr/decr

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README
··· 19 19 $ intel_backlight 50 20 20 current backlight value: 15% (141/937) 21 21 set backlight to 50% (469/937) 22 + $ intel_backlight incr 23 + current backlight value: 50% (469/937) 24 + set backlight to 51% (478/937) 25 + $ intel_backlight incr 26 + current backlight value: 51% (478/937) 27 + set backlight to 60% (562/937) 28 + $ intel_backlight incr 29 + current backlight value: 60% (562/937) 30 + set backlight to 70% (656/937) 31 + $ intel_backlight decr 32 + current backlight value: 70% (656/937) 33 + set backlight to 60% (562/937) 34 + $ intel_backlight decr 35 + current backlight value: 60% (562/937) 36 + set backlight to 51% (478/937)