From: Marco Chiappero <marco@absence.it>
To: Michel Alexandre Salim <salimma@fedoraproject.org>
Cc: linux-acpi@vger.kernel.org,
platform-driver-x86 <platform-driver-x86@vger.kernel.org>,
Mattia Dongili <malattia@linux.it>
Subject: Re: Need help debugging Sony Vaio VPCY2 backlight control problem
Date: Mon, 04 Jul 2011 21:51:13 +0200 [thread overview]
Message-ID: <4E1219B1.9050404@absence.it> (raw)
In-Reply-To: <4E120DD9.9070506@fedoraproject.org>
Il 04/07/2011 21:00, Michel Alexandre Salim ha scritto:
> Hi Marco,
Hi,
> Unfortunately, the results are, again, rather confusing. With
> sony-laptop.ko, after running backlight_fix once, actual_brightness has
> a nonsensical value -- 55.
It looks reasonable, don't worry about it.
> I tried setting it to 5, and something
> actually happens this time - actual_brightness now reads 5 rather than
> -1, and the screen brightness actually changes -- but, alas, too much
> (if the brightness range is from 0 to 7, 5 should be rather bright,
> instead it looked more like a 2 to me).
This is weird, brightness level should be ~75%.
> Further attempts to adjust brightness produced no result --
> actual_brightness now tallies with brightness, like the video.ko's
> behavior, but the screen remained dim. Repeatedly running backlight_fix
> does not resolve matter either.
even more weird. I don't know if IGID has changed in the meantime, but
there's something not working properly elsewhere. But definitely it's
not a problem belonging to sony-laptop or video (which should be used
because SBRT/GBRT methods, with 0 based values and 9 values range, pose
problems with the current backlight device implementation in sony-laptop).
> Anything else I can try?
The patches attached by Rui. Sorry but I can't help further.
prev parent reply other threads:[~2011-07-04 19:51 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-01 19:34 Need help debugging Sony Vaio VPCY2 backlight control problem Michel Alexandre Salim
2011-07-01 22:12 ` Marco Chiappero
2011-07-04 8:46 ` Michel Alexandre Salim
2011-07-04 8:48 ` Michel Alexandre Salim
2011-07-04 8:57 ` Zhang Rui
2011-07-04 8:57 ` Zhang Rui
2011-07-04 11:31 ` Michel Alexandre Salim
2011-07-04 13:34 ` Michel Alexandre Salim
2011-07-13 12:51 ` Michel Alexandre Salim
2011-07-04 10:58 ` Marco Chiappero
2011-07-04 19:00 ` Michel Alexandre Salim
2011-07-04 19:51 ` Marco Chiappero [this message]
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