Add a general socket (not input device, but still need to be woken for it)
handler to both the DIX and XFree86, and make XFree86's ACPI handling use
it. This stops DPMS waking up every time an ACPI notification comes in.
programs/Xserver/hw/xfree86/os-support/linux/lnx_apm.c
programs/Xserver/hw/xfree86/os-support/linux/Imakefile Add basic ACPI Linux
support so that events can be passed to the driver. (Alan Hourihane)