From: Mattia Dongili <malattia@linux.it>
To: Norbert Preining <preining@logic.at>
Cc: linux-acpi@vger.kernel.org
Subject: Re: Sony backlight regression from 2.6.28 to 29-rc
Date: Mon, 19 Jan 2009 21:58:09 +0900 [thread overview]
Message-ID: <20090119125808.GB21586@kamineko.org> (raw)
In-Reply-To: <20090119081423.GA25297@gamma.logic.tuwien.ac.at>
On Mon, Jan 19, 2009 at 09:14:23AM +0100, Norbert Preining wrote:
> Dear all,
>
> there is a regression from 2.6.28 to 2.6.29-rc, namely that the
> backlight cannot be controlled anymore.
>
> Previously I was able to get a working backlight control with late
> 2.6.28 kernels, not sure if I needed some patches posted by Mattia.
You probably required and still require
[sony-laptop] detect the ICH9 chipset as Type3
and
[sony-laptop] call the extra enable function for SNC on Vaio Z
at least.
> Now, with 2.6.29-rc2 with and without these patches the backlight does
> not work at all, no change.
>
> INterestingly changing the "values" in the sys-files does work (via
> /sys/class/backlight/acpi_video0/brightness), either per hand or using
> xbacklight. but there is no effect on the actual brightness.
what were you using before? the acpi_video0 entry or the sony-laptop
one?
> And the sony_laptop sys entries have lost their brightness values.
>
> Is there a way to restore this behaviour?
>
> (Even better, get sony_laptop fixed completely?)
>
> Hardware: Vaio VGN-Z11
well, there as been no change to the sony-laptop driver from 2.6.28 to
.29-rc2 except for moving it to drivers/platform/x86.
--
mattia
:wq!
next prev parent reply other threads:[~2009-01-19 13:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-19 8:14 Sony backlight regression from 2.6.28 to 29-rc Norbert Preining
2009-01-19 12:58 ` Mattia Dongili [this message]
2009-01-19 14:19 ` Norbert Preining
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