Re: no brightness with acpi video since 3.3 [was Re: Issues with the sony-platform module]

[Mattia Dongili <malattia@linux.it>]

On Sat, Jun 16, 2012 at 01:24:58PM +0200, Karol Babioch wrote:
> Hi,
...
> > Can you try applying the sony-laptop patches on 3.2, boot with
> > acpi_backlight=vendor and see what is the state there?
> It behaves just like 3.3. What might be interesting is 3.1. Here some
> really strange values get returned:
> 
> [root@vpcs nv_backlight]# cat actual_brightness brightness max_brightness
...

how about the sony-laptop stuff with 3.1+patches?
What is the output of
$ grep . /sys/class/backlight/*/*
$ grep . /sys/devices/platform/sony-laptop/*
and the kernel log after these two commands

I'm trying to understand is if the patch series I sent works for
you on the last working version of kernel (i.e. 3.1 apparently).

...
> I'm currently trying to reconstruct the last version that worked for me.
> I'm quite sure that "vaio-full-3.0.4.patch" (from here [1]), worked fine
> with the 3.1.x branch. However I've just recompiled 3.1.10 and it
> doesn't seem to work. Anyway it worked without the
> "acpi_backlight=vendor" parameter, so I'm not quite sure whether this is
> of interest for you right now.

it is actually. What did you have in the sony-laptop sysfs directories
when booting with acpi_backlight=vendor?

Thanks!
-- 
mattia
:wq!