x220 notes

Kevin Oberman kob6558 at gmail.com
Mon Apr 2 03:44:53 UTC 2012

2012/4/1 Hannes Mehnert <hannes at mehnert.org>:
> Hi,
> controlling brightness works for me (via shell) - taking matt's advice
> into account:
>> \VBRC seems to allow control over the backlight, at least, so those of
> you with sore eyes or the 3-cell battery may have some success using the
> acpi_call port (Danger!)
>> kldload acpi_call
>> acpi_call -p '\VBRC' -i n (where n is 0-16; 17 (and -1) is off)

This works well, but I'll need to look at how to make Gnome do the job
so the automatic dimming will work.

Also, at least on my ThinkPad, its 0-15. 16 and 14 are identical and
slightly dimmer than 15. Maybe it's a BIOS issue on my laptop? I see
Lenovo has released a new one recently.
R. Kevin Oberman, Network Engineer
E-mail: kob6558 at gmail.com

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