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ACPI_VIDEO(4) FreeBSD Kernel Interfaces Manual ACPI_VIDEO(4) NAME acpi_video -- ACPI Video Extensions driver SYNOPSIS device acpi_video DESCRIPTION This driver uses the ACPI Video Extensions to control display switching and backlight brightness. The availability of the sysctl(8) variables depends on the functions offered by the host's ACPI implementation. SYSCTLS The following sysctls are currently implemented, where <device> is crt, lcd, or tv: hw.acpi.video.<device>.active Current state of the device. hw.acpi.video.<device>.levels List of supported brightness levels. hw.acpi.video.<device>.brightness Current brightness level of the device. hw.acpi.video.<device>.fullpower Preset brightness level to be used in full power mode. hw.acpi.video.<device>.economy Preset brightness level to be used in economy mode. Defaults for these variables can be set in sysctl.conf(5), which is parsed at boot-time. SEE ALSO acpi(4), loader.conf(5), sysctl.conf(5), sysctl(8) HISTORY The acpi_video driver first appeared in FreeBSD 5.3. AUTHORS The acpi_video driver was written by Taku YAMAMOTO <taku@cent.saitama-u.ac.jp>. This manual page was written by Mark Santcroos <marks@ripe.net>. FreeBSD 11.1 March 3, 2004 FreeBSD 11.1
NAME | SYNOPSIS | DESCRIPTION | SYSCTLS | SEE ALSO | HISTORY | AUTHORS
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