ACPI_PANASONIC(4)
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NAME
SYNOPSIS
DESCRIPTION
Hotkeys
Devd Events
SYSCTLS
SEE ALSO
AUTHORS
BUGS
acpi_panasonic -- ACPI hotkey driver for Panasonic laptops
device acpi_panasonic
The acpi_panasonic driver enables such hotkey facilities of various Pana-
sonic laptops as changing LCD brightness, controlling mixer volumes,
entering sleep or suspended state and so on. On the following models it
is reported to work: Let's note (or Toughbook, outside Japan) CF-R1N, CF-
R2A and CF-R3. It may also work on other models as well.
The driver consists of three functionalities. The first is to detect
hotkey events and take corresponding actions, which include changing LCD
luminance and speaker mute state. The second role is to notify
occurences of the event by way of devctl(4) and eventually to devd(8).
The third and last is to provide a way to adjust LCD brightness and sound
mute state via sysctl.
Hotkeys
There are 9 hotkeys available on the supported hardwares:
Fn+F1 Make LCD backlight darker.
Fn+F2 Make LCD backlight brighter.
Fn+F3 Switch video output between LCD and CRT. Not supported by
the acpi_panasonic driver.
Fn+F4 Toggle muting the speaker.
Fn+F5 Turn the mixer volume down.
Fn+F6 Turn the mixer volume up.
Fn+F7 Enter suspend-to-RAM state.
Fn+F9 Show battery status.
Fn+F10 Enter suspend-to-disk state.
Actions are automatically taken within the driver for Fn+F1, Fn+F2 and
Fn+F4. For the other events such as mixer control and showing battery
status, devd(8) should take the role as described below.
Devd Events
When notified to devd(8), the hotkey event provides the following infor-
mation:
system "ACPI"
subsystem "Panasonic"
type The source of the event in ACPI namespace. The value
depends on the model but typically "\_SB_.HKEY".
notify Event code (see below).
Event codes to be generated are assigned as follows:
0x81-0x86, 0x89
Fn+F<n> pressed. 0x81 corresponds to Fn+F1, 0x82 cor-
responds to Fn+F2, and so on.
0x01-0x07, 0x09, 0x1a
Fn+F<n> released. 0x01 corresponds to Fn+F1, 0x02
corresponds to Fn+F2, and so on.
The following read-write MIBs are available:
hw.acpi.panasonic.lcd_brightness_max
The max level of brightness. The value ranges from 0 to 255.
CF-R1N and CF-R2A should be 255, CF-R3 is 31.
hw.acpi.panasonic.lcd_brightness
Current brightness level of the LCD. The value ranges from 0 to
hw.acpi.panasonic.lcd_brightness_max.
hw.acpi.panasonic.sound_mute
A boolean flag to control whether to mute the speaker. The value
1 means to mute and 0 not.
acpi(4), sysctl(8), devd(8), devd.conf(5)
The acpi_panasonic driver and this manual page were written by OGAWA
Takaya <t-ogawa@triaez.kaisei.org> and
TAKAHASHI Yoshihiro <nyan@FreeBSD.org>.
The code is written in trial-and-error manner. There is no way to con-
firm the correctness except by ``it just works here''.