[ltp] T61/intel: LCD brightness

[Marius Gedminas]

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On Tue, Oct 23, 2007 at 12:29:46PM +0300, Marius Gedminas wrote:
> I've a Lenovo T61, running Ubuntu Gutsy.
>=20
> When I first bought it, I noticed that the LCD was much brighter than my
> external LCD monitor.  Now, two months later, it looks dimmer than the
> same external monitor.  What gives?
>=20
> xbacklight shows the brightness as 100%.  /proc/acpi/ibm/brightness shows
> level 7 out of 7.  AC power is plugged in (if I pull the plug, the LCD
> dims a little bit, but it's almost imperceptible).
>=20
> Are there any other brightness controls that might lower it, or did the
> screen just become "tired" over those two months?

If I reboot, I can increase the brightness with Fn-Home while in the
GRUB menu.  These keys stop working at all once I boot into Gutsy.

So there's apparently a third brightness control somewhere.  Can it be
controlled via software?

Marius Gedminas
--=20
The advertisement is the most truthful part of a newspaper.
                -- Thomas Jefferson

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