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From: Ustun Kaya on 31 Mar 2010 00:10
Hello folks,

I installed Debian Squeeze on Dell Studio 1749 and I can't change the
brightness when the OS is up (Fn + F4 - F5 doesn't work). It works
when the BIOS screen is open, before booting into Debian. xbacklight
gives the following output:

ustun(a)Earth:~$ xbacklight -get
No outputs have backlight property

Any help?

Best,
Ustun


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From: Anthony Campbell on 1 Apr 2010 05:40
On 30 Mar 2010, Ustun Kaya wrote:
> Hello folks,
>
> I installed Debian Squeeze on Dell Studio 1749 and I can't change the
> brightness when the OS is up (Fn + F4 - F5 doesn't work). It works
> when the BIOS screen is open, before booting into Debian. xbacklight
> gives the following output:
>
> ustun(a)Earth:~$ xbacklight -get
> No outputs have backlight property
>
> Any help?
>
> Best,
> Ustun
>

I had a similar problem on my HP laptop. I solved it with the following
(as root):

echo 10 > /sys/devices/virtual/backlight/acpi_video0/brightness


I've put it in /etc/rc.local to save having to enter it manually each
time.

Anthony

--
Anthony Campbell - ac(a)acampbell.org.uk
Microsoft-free zone - Using Debian GNU/Linux
http://www.acampbell.org.uk - sample my ebooks at
http://www.smashwords.com/profile/view/acampbell


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