Date: Thu, 29 Jan 2004 17:33:56 +0100 From: Mark Santcroos <marks@ripe.net> To: Taku YAMAMOTO <taku@cent.saitama-u.ac.jp> Cc: freebsd-current@freebsd.org Subject: Re: API to turn off the display Message-ID: <20040129163356.GA45518@laptop.6bone.nl> In-Reply-To: <20040129060727.619f3866.taku@cent.saitama-u.ac.jp> References: <200401272247.59306.freebsd-current@webteckies.org> <20040128.083215.114732225.imp@bsdimp.com> <20040128181110.GC775@laptop.lambertfam.org> <200401281319.02208.jhb@FreeBSD.org> <20040129060727.619f3866.taku@cent.saitama-u.ac.jp>
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On Thu, Jan 29, 2004 at 06:07:27AM +0900, Taku YAMAMOTO wrote: > I wrote a driver that handles what John told. > > http://access.cent.saitama-u.ac.jp/~taku/freebsd/acpi_vid-20031013.tar.gz > MD5 (acpi_vid-20031013.tar.gz) = adbfa6931e505544fb784e00c7b974e7 > > This driver uses ACPI video extension to control display switching and > backlight brightness. So working ACPI is a requisition for this driver. > > Whether it does or does not work depends heavily on how well the BIOS written, > however, I hope it worth trying. Tried it on my Latitude C640. acpi_vid0: <ACPI video extension> on acpi0 found CRT monitor(100), detectable by BIOS, head #0 found LCD panel(110), detectable by BIOS, head #0 unknown: not probed (disabled) unknown: not probed (disabled) unknown: not probed (disabled) unknown: not probed (disabled) Toggling the lcd0.active sysctl to "0", turns the screen off for a second, but then it turns on again. The sysctl stays as "0" though. Setting it "from 0 to 0" after that blanks the screen for a second again. Effect on console and in X is similar. Mark
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