[Fix PATCH] ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

[Fix PATCH] ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

[tianyu.lan]

From: Lan Tianyu <tianyu.lan@intel.com>

The BIOS of FUjitsu E753 reports an incorrect initial backlight value
for WIN8 compatible OS, causing backlight dark during startup. This
patch ignores the incorrect initial value from BIOS.

Reference:https://bugzilla.kernel.org/show_bug.cgi?id=60161
Reported-and-tested-by: Jan Hinnerk Stosch <janhinnerk.stosch@gmail.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
 drivers/acpi/video.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5d7075d..e441876 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -450,6 +450,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 	},
 	{
 	 .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"),
-- 
1.7.9.5

Re: [Fix PATCH] ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

[Rafael J. Wysocki]

On Tuesday, July 16, 2013 10:07:21 AM tianyu.lan@intel.com wrote:
> From: Lan Tianyu <tianyu.lan@intel.com>
> 
> The BIOS of FUjitsu E753 reports an incorrect initial backlight value
> for WIN8 compatible OS, causing backlight dark during startup. This
> patch ignores the incorrect initial value from BIOS.
> 
> Reference:https://bugzilla.kernel.org/show_bug.cgi?id=60161
> Reported-and-tested-by: Jan Hinnerk Stosch <janhinnerk.stosch@gmail.com>
> Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>

Queued up as a fix for 3.11.

What's the oldest mainline kernel release this patch is applicable to?

Rafael


> ---
>  drivers/acpi/video.c |    8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
> index 5d7075d..e441876 100644
> --- a/drivers/acpi/video.c
> +++ b/drivers/acpi/video.c
> @@ -450,6 +450,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
>  	},
>  	{
>  	 .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"),
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.

Re: [Fix PATCH] ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

[Lan Tianyu]

On 2013年07月18日 06:35, Rafael J. Wysocki wrote:
> On Tuesday, July 16, 2013 10:07:21 AM tianyu.lan@intel.com wrote:
>> From: Lan Tianyu <tianyu.lan@intel.com>
>>
>> The BIOS of FUjitsu E753 reports an incorrect initial backlight value
>> for WIN8 compatible OS, causing backlight dark during startup. This
>> patch ignores the incorrect initial value from BIOS.
>>
>> Reference:https://bugzilla.kernel.org/show_bug.cgi?id=60161
>> Reported-and-tested-by: Jan Hinnerk Stosch <janhinnerk.stosch@gmail.com>
>> Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
> 
> Queued up as a fix for 3.11.
> 
> What's the oldest mainline kernel release this patch is applicable to?

This should be backport to 3.7+ kernel.

Cc: <stable@vger.kernel.org> # 3.7+

> 
> Rafael
> 
> 
>> ---
>>  drivers/acpi/video.c |    8 ++++++++
>>  1 file changed, 8 insertions(+)
>>
>> diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
>> index 5d7075d..e441876 100644
>> --- a/drivers/acpi/video.c
>> +++ b/drivers/acpi/video.c
>> @@ -450,6 +450,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
>>  	},
>>  	{
>>  	 .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"),
>>


-- 
Best regards
Tianyu Lan
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