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

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Message-ID: <20120108134029.GA7708@ubuntu-mba>
Date:	Sun, 8 Jan 2012 14:40:29 +0100
From:	Seth Forshee <seth.forshee@...onical.com>
To:	Corentin Chary <corentin.chary@...il.com>
Cc:	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 08, 2012 at 01:36:45PM +0100, Corentin Chary wrote:
> 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,

Sure, but it won't be until next week. I'm travelling this week and
don't have the machine with me.
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