Screen Luminosity

[Zach]

Assuming you want to know how to adjust screen brightness on your
laptop which runs Ubuntu, this may well be an Ubuntu question.

On some laptops such as mine, a sony vaio, things like screen
brightness and other Fn keys are controlled through software and as
such require a special driver and utility.  For the sony vaios, the
utility is called spicctrl.  For example, on my laptop, once the
driver and utility is installed can enter the command spicctrl -b 120
to lower the brightness to 50%.  I can add appropriate apicctrl to
acpi scripts so that the screen is dimmed when I unplug A/C power and
brightened when I plug A/C power back in.  If you have a sony, search
in synaptic for sony, and also search for spicctrl.  For more info try
searching google for Sony Programmable I/O, spicctrl, "spicctrl
ubuntu".  Also search the forums for these things.

Other laptops control this purely in hardware.  The Dell inspiron 8200
I used to have was like this.  Screen brightness was entirely
operating system independent, which for me was preferable.  For
example, you could boot up off a dos disk and still control screen
brightness.  The options (as far as A/C vs battery, etc) were
configured in the BIOS.

Aside from Sony, and the Dell mentioned above, I don't know how other
machines work, but these are two examples.

Hope this helps.

Zach C.

On 9/18/05, Derek Broughton <news at pointerstop.ca> wrote:
> Dario Meloni wrote:
> 
> > Is possibile to change the screen luminosity on a laptop computer ?
> >
> Yes, but it's not an ubuntu question, and it's dependent on your laptop.
> --
> derek
> 
> 
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