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Date: Mon, 24 Dec 2012 13:55:30 +0100 From: Roland Stigge <stigge@...com.de> To: Corentin Chary <corentin.chary@...il.com> CC: gregkh@...uxfoundation.org, Matthew Garrett <mjg@...hat.com>, "platform-driver-x86@...r.kernel.org" <platform-driver-x86@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] samsung-laptop: Set keyboard backlight initially On 24/12/12 09:41, Corentin Chary wrote: > On Sun, Dec 23, 2012 at 6:21 PM, Roland Stigge <stigge@...com.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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