ACPIVGA(4) | Kernel Interfaces Manual | ACPIVGA(4) |
The driver handles brightness hotkeys and display switch hotkeys. In addition, the following sysctl(8) read/write variables are provided (when hardware support is available):
Please note, however, that future versions of acpivga may remove these sysctl(8) variables without prior notice.
Microsoft Corporation, Mobile System Displays and Windows, Version 1.2c, December 4, 2001, http://www.microsoft.com/whdc/archive/mobiledisplay.mspx.
Many ACPI BIOSes implement only part of the ACPI video extensions. In particular, display output switching via these extensions often does not work. For this reason, acpivga enables hw.acpi.acpivga0.bios_switch by default. If the display switch hotkey does not work with this default setting, try setting hw.acpi.acpivga0.bios_switch to 0.
Brightness level should be controlled via wsconsctl(8) instead of sysctl(8).
October 28, 2010 | NetBSD 6.1 |