linux-kernel - Re: [53/84] ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

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Message-ID: <87ehac2oju.fsf@canonical.com>
Date:	Fri, 02 Aug 2013 14:46:29 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	akpm@...ux-foundation.org,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	"Lan Tianyu" <tianyu.lan@...el.com>
Subject: Re: [53/84] ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

Ben Hutchings <ben@...adent.org.uk> writes:

> 3.2.50-rc1 review patch.  If anyone has any objections, please let me know.
>
> ------------------
>
> From: Lan Tianyu <tianyu.lan@...el.com>
>
> commit 9657a565a476d517451c10b0bcc106e300785aff upstream.

For some reason, this commit has been tagged for stable 3.7+ (and this
is why I haven't queued for 3.5).  Is there any reason for this?

Cheers,
-- 
Luis


>
> The BIOS of FUjitsu E753 reports an incorrect initial backlight
>value
> for WIN8 compatible OS, causing backlight to be dark during startup.
> This change causes the incorrect initial value from BIOS to be ignored.
>
> References: https://bugzilla.kernel.org/show_bug.cgi?id=60161
> Reported-and-tested-by: Jan Hinnerk Stosch <janhinnerk.stosch@...il.com>
> Signed-off-by: Lan Tianyu <tianyu.lan@...el.com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
> ---
>  drivers/acpi/video.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> --- a/drivers/acpi/video.c
> +++ b/drivers/acpi/video.c
> @@ -449,6 +449,14 @@ static struct dmi_system_id video_dmi_ta
>  	},
>  	{
>  	 .callback = video_ignore_initial_backlight,
> +	 .ident = "Fujitsu E753",
> +	 .matches = {
> +		DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"),
> +		DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"),
> +		},
> +	},
> +	{
> +	 .callback = video_ignore_initial_backlight,
>  	 .ident = "HP Pavilion dm4",
>  	 .matches = {
>  		DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
>
> --
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