— Asus Laptop Extras
To compile this driver into the kernel, place the following line in your kernel
Alternatively, to load the driver as a module at boot time, place the following
line in loader.conf(5)
driver provides support for the extra
ACPI-controlled gadgets, such as hotkeys and leds, found on recent Asus (and
Medion) laptops. It allows one to use the sysctl(8)
interface to manipulate the brightness of the LCD panel and the display output
state. Hotkey events are passed to devd(8)
for easy handling
in userspace with the default configuration in
Currently, the following Asus laptops are fully supported:
- Eee PC
also supports the Asus-compatible
interface found in Samsung P30/P35
The following sysctls are currently implemented:
- Makes the LCD backlight brighter or dimmer (higher values
- Turns the LCD backlight on or off.
- Sets the active display to use according to a bitwise OR of
Some models also support video switching via the generic
acpi_video(4) driver. Most models do not, however.
- No display
Defaults for these variables can be set in sysctl.conf(5)
which is parsed at boot-time.
The acpi4asus Project,
driver first appeared in
driver and this manual page were written by
Inspiration came from the acpi4asus project
which maintains a driver implementing
this functionality in the Linux kernel.