linux-kernel - Re: [PATCH] ACPI / Video: blacklist some samsung laptops

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Date:	Sun, 8 Jan 2012 13:36:45 +0100
From:	Corentin Chary <corentin.chary@...il.com>
To:	Corentin Chary <corentincj@...aif.net>,
	platform-driver-x86@...r.kernel.org,
	Zhang Rui <rui.zhang@...el.com>, linux-kernel@...r.kernel.org,
	Andrzej Prochyra <andrzej@...chyra.name>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	David Herrmann <dh.herrmann@...glemail.com>,
	Richard Schütz <r.schtz@...nline.de>,
	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org
Subject: Re: [PATCH] ACPI / Video: blacklist some samsung laptops

On Sun, Jan 8, 2012 at 11:46 AM, Seth Forshee
<seth.forshee@...onical.com> wrote:
> On Sat, Jan 07, 2012 at 03:12:38PM +0100, Corentin Chary wrote:
>> On these laptops, the ACPI video is not functional, and very unlikely
>> to be fixed by the vendor. Note that intel_backlight works for some
>> of these laptops, and the backlight from samsung-laptop always work.
>>
>> The good news is that newer laptops have functional ACPI video device
>> and won't end up growing this list.
>>
>> Signed-off-by: Corentin Chary <corentincj@...aif.net>
>> ---
>>
>> Could the concerned people test this patch and check that it correctly
>> disable the acpi_video backlight ?
>>
>>  drivers/acpi/video_detect.c |   40 ++++++++++++++++++++++++++++++++++++++++
>>  1 files changed, 40 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
>> index 45d8097..376bce2 100644
>> --- a/drivers/acpi/video_detect.c
>> +++ b/drivers/acpi/video_detect.c
>> @@ -132,6 +132,44 @@ find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
>>       return AE_OK;
>>  }
>>
>> +/* Force to use vendor driver when the ACPI device is known to be
>> + * buggy */
>> +static int video_detect_force_vendor(const struct dmi_system_id *d)
>> +{
>> +     acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
>> +     return 0;
>> +}
>> +
>> +static struct dmi_system_id video_detect_dmi_table[] = {
>> +     {
>> +      .callback = video_detect_force_vendor,
>> +      .ident = "N150P",
>> +      .matches = {
>> +             DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
>> +             DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
>> +             DMI_MATCH(DMI_BOARD_NAME, "N150P"),
>> +             },
>> +     },
>> +     {
>> +      .callback = video_detect_force_vendor,
>> +      .ident = "N145P/N250P/N260P",
>> +      .matches = {
>> +             DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
>> +             DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
>> +             DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
>> +             },
>> +     },
>> +     {
>> +      .callback = video_detect_force_vendor,
>> +      .ident = "N150/N210/N220",
>> +      .matches = {
>> +             DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
>> +             DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
>> +             DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
>> +             },
>> +     },
>> +};
>> +
>
> I don't see NF110/NF210/NF310 in this list. Was that an oversight?

Ooops. Could you add it and try the patch, then send me lines you added ?
Thanks,

-- 
Corentin Chary
http://xf.iksaif.net
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