Re: [gentoo-user] Re: Backlight problems

[Grant]

[snip]
>> Hey Mark, I'm happy to say I just fixed the screen backlighting on my
>> system, but I'm sorry to say I don't think it will help you with
>> keyboard backlighting.  To fix it, I removed 'acpi_backlight=vendor'
>> from grub and added 'echo 0 >
>> /sys/class/backlight/intel_backlight/brightness' to
>> /etc/local.d/backlight.start and made that file executable.  Now
>> backlight control works perfectly via the keyboard shortcuts with no
>> other configuration and no xbacklight.  I'm on
>> hardened-sources-3.2.2-r1.
>>
>> BTW, I noticed baselayout1.start and baselayout1.stop are no longer
>> created in /etc/local.d.
>>
>> - Grant
>>
>
> Hi Grant,
>   OK, that's interesting info. Here's what I'm currently seeing:
>
> slinky ~ # uname -a
> Linux slinky 3.2.10 #1 SMP PREEMPT Tue Mar 13 09:45:35 PDT 2012 x86_64
> Intel(R) Core(TM) i7 CPU Q 740 @ 1.73GHz GenuineIntel GNU/Linux
> slinky ~ # ls -al /etc/local.d/
> total 20
> drwxr-xr-x  2 root root 4096 Feb 23 21:03 .
> drwxr-xr-x 72 root root 4096 Mar 16 11:53 ..
> -rw-r--r--  1 root root  387 Feb 23 21:03 README
> -rwxr-xr-x  1 root root  123 May  3  2011 baselayout1.start
> -rwxr-xr-x  1 root root  217 May  3  2011 baselayout1.stop
> slinky ~ # ls -la /sys/class/backlight/asus_laptop/
> total 0
> drwxr-xr-x 2 root root    0 Mar 16 04:35 .
> drwxr-xr-x 3 root root    0 Mar 16 04:35 ..
> -r--r--r-- 1 root root 4096 Mar 16 12:09 actual_brightness
> -rw-r--r-- 1 root root 4096 Mar 16 12:09 bl_power
> -rw-r--r-- 1 root root 4096 Mar 16 11:40 brightness
> lrwxrwxrwx 1 root root    0 Mar 16 12:09 device ->
> ../../../asus_laptop
> -r--r--r-- 1 root root 4096 Mar 16 11:40 max_brightness
> lrwxrwxrwx 1 root root    0 Mar 16 04:35 subsystem ->
> ../../../../../class/backlight
> -r--r--r-- 1 root root 4096 Mar 16 12:09 type
> -rw-r--r-- 1 root root 4096 Mar 16 04:35 uevent
> slinky ~ # cat /sys/class/backlight/asus_laptop/brightness
> 15
> slinky ~ #
>
>   So, it seems to me that following your example, if I wanted to
> experiment with screen backlighting what would I do? I'm in KDE BTW in
> case we're doing something different in that regard.
>
>   I see in the Global Keyboard Shortcuts in KDE that there are
> Monitor Brightness Down/Up controls defined but I'm not understanding
> what keys actually control those. I  Googled around for a minute and
> found Fn-ArrowUp/ArrowDn but they didn't work o I'm hoping you can
> tell me and save me a few minutes. Maybe it's because I haven't
> started something required?
>
>   acpi_listen on n-ArrowUp/Dn does produce a response so maybe I
> don't have something properly mapped?

Have you tried adding 'acpi_osi=Linux acpi_backlight=vendor' to grub?
Is asus_laptop all you have in /sys/class/backlight?

>   I do have baselayout1.start/stop stuff so it seems our systems are
> fairly different.

My new install doesn't have them, but all of my old installs do have
them and 'equery b /etc/local.d/baselayout1.start' comes back with
nothing so I don't think they're being installed anymore.

- Grant