From: Roland Stigge <stigge@antcom.de>
To: Corentin Chary <corentin.chary@gmail.com>
Cc: gregkh@linuxfoundation.org, Matthew Garrett <mjg@redhat.com>,
"platform-driver-x86@vger.kernel.org"
<platform-driver-x86@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] samsung-laptop: Set keyboard backlight initially
Date: Mon, 24 Dec 2012 13:55:30 +0100 [thread overview]
Message-ID: <50D850C2.7050809@antcom.de> (raw)
In-Reply-To: <CAHR064iQeQrQF0qrGXJoCmYny2H_H_JnV_h8OvRSmD=bGE5eYA@mail.gmail.com>
On 24/12/12 09:41, Corentin Chary wrote:
> On Sun, Dec 23, 2012 at 6:21 PM, Roland Stigge <stigge@antcom.de> wrote:
>> After boot, /sys/devices/platform/samsung/leds/samsung::kbd_backlight/brightness
>> shows the maximum value (8) by readout, but the led is off. I need to manually
>> set it to the respective value to have keyboard backlight.
>
> If the led is set to 0, what's the value after reboot ? 0 or 8 ?
Right - when writing 0 there before restart, the led value is actually 8
after reboot, and the LED hardware is ON. This holds for both reboot and
halt+poweron cycle.
Maybe this is related to the "#define MAX_BRIGHT 0x07" (which is unused
in samsung-laptop.c)? A bit confusing in the code - but your question
hints for some other bug (to be solved differently). Tell me if I can
help somehow, here.
> What's the behavior on windows ?
There is no windows available on this machine.
Thanks,
Roland
next prev parent reply other threads:[~2012-12-24 12:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-23 17:21 [PATCH] samsung-laptop: Set keyboard backlight initially Roland Stigge
2012-12-24 8:41 ` Corentin Chary
2012-12-24 12:55 ` Roland Stigge [this message]
2013-01-03 20:46 ` Corentin Chary
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