http://bugzilla.kernel.org/show_bug.cgi?id=11682
------- Comment #18 from [EMAIL PROTECTED] 2008-11-27 17:28 -------
(In reply to comment #17)
> I own a Vaio FW11S too, and I had exactly the same problem than Rafal Milecki.
> The problem was very problematic because the laptop has two LED backlights and
> it is impossible to stay in front of it when set to the maximum power.
>
how to set it to the maximum power?
> So, I've tried recompiled the kernel with the new DSDT.hex file you've
> attached
> here, and it works perfectly well!
that's nice. :)
> The /sys/class/backlight/ file has now
> acpi_video0 and acpi_video1 folders, and the backlight can now be set "out of
> the box" with PowerDevil in KDE 4.1.80.
>
does poking the /sys/class/backlight/acpi_video{0,1}/brightness change the
backlight?
I suggest you update your kernel to the latest kernel release, and you'll see
only acpi_video0 here, which actually works.
> Can we now hope this .hex fix will be provided with the next releases of the
> kernel ?
>
no, this is not a kernel bug. And the fix is in BIOS rather than kernel.
In order to make brightness work on your laptop, I think you need to upgrade
your BIOS to see if it's fixed, or use this customized DSDT for all Linux
kernels.
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