* getting BIOS to control screen
@ 2003-12-04 2:42 Alexei Gilchrist
0 siblings, 0 replies; only message in thread
From: Alexei Gilchrist @ 2003-12-04 2:42 UTC (permalink / raw)
To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
Hi,
Under ACPI my laptops screen buttons don't work (ie switching to external screen
and setting the brightness). They DO work under APM though. This is a real pain
as I often need to switch to an external screen and I have to reboot to do this
at the moment.
blundering through the DSDT ASL I came across:
Method (_DOS, 1, NotSerialized)
{
Store (And (Arg0, 0x03), Local0)
\_SB.PSRV (0xB9, 0x20, 0x01, Local0, 0x00)
}
If I also set bit1 to 1: And(And (Arg0, 0x03), 0x01)???? can I force it to use
the BIOS ala APM? or have I lost the plot?
cheers,
Alexei
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