backlight utility?

[Noah Duffy]

On Thu, Jul 23, 2015, at 09:42 PM, Dave Stevens wrote:
> I've got a samsung n220 netbook into which I recently installed a ssd.
> I took advantage of the install to do a clean fresh install of U14.04.
> It went well except that I can no longer adjust my backlight. The
> function keys that used to do this appear to work - I get a little
> slider display on-screen - but there isn't any actual difference in
> screen brightness. Anyone have an idea about this one? I tried the
> software centre under acpi and backlight but the hits don't seem
> relevant.
> 
> Dave

I had the same issue on my laptop and was able to solve it by adding
acpi_backlight=vendor to /etc/default/grub.

After you make the edit, it should look something like this:
GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor quiet"

After you make the change, you'll need to update grub:
sudo apt-get update-grub

Try it out and see if it works (you'll have to reboot).

-- 
Noah Duffy
noahduffy at fastmail.fm

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