Switching LCD off on a laptop (or change to CRT)

Mario Lang
2002-09-23T14:11:35Z

hello.

I recently got a JVC MP-XP7210DE. First of all, congrats,
ACPI worked out of the box with 2.4.20pre7. I have correct
ac_adaptor info, correct battery info (even for both
slots), and the power button works too under acpid.

One remaining glitch I have is getting the internal
display to switch off. Under XP, this works fine
with Fn-F10. If I do this under Linux, I get a message
telling me that this button is not implemented (on the console).

Well, that indicates that this LCD display off thing
must be done by the operating system.

Well, I'm blind[1], and I realllllly don't need that display,
and switching it off would save alot of power. Any hint
on what I could try to achieve this would be very helpful.

Does any of the acpi patches already support that? I think
it should be a acpi standard, as there is a screen
saver for Windows NT which does exactly that via ACPI (turn
the display off).

[1] Yeah, don't be supprised, that works really nicely.
I use speech and braille output (mostly speech while I'm mobile though),
and the display is really just a waste of energy most of the time.

P.S.: Sorry to bother the -devel list with that, but it
is very very difficult to get competent answers for
ACPI questions. All HOWTOs seem to still refer
to APM, and well, this notebook doesnt seem to have apm.

--
CYa,