On Wed, Dec 2, 2020 at 7:41 AM Chris Chiu <chiu@xxxxxxxxxxxxx> wrote:
>
> From: "Jasper St. Pierre" <jstpierre@xxxxxxxxxxx>
>
> The GIGABYTE GB-BXBT-2807 is a mini-PC which uses off the shelf
> components, like an Intel GPU which is meant for mobile systems.
> As such, it, by default, has a backlight controller exposed.
>
> Unfortunately, the backlight controller only confuses userspace, which
> sees the existence of a backlight device node and has the unrealistic
> belief that there is actually a backlight there!
>
> Add a DMI quirk to force the backlight off on this system.
>
> Signed-off-by: Jasper St. Pierre <jstpierre@xxxxxxxxxxx>
> Reviewed-by: Chris Chiu <chiu@xxxxxxxxxxxxx>
> ---
> drivers/acpi/video_detect.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
> index 2499d7e3c710..ac2e194acdbf 100644
> --- a/drivers/acpi/video_detect.c
> +++ b/drivers/acpi/video_detect.c
> @@ -143,6 +143,13 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
> },
> {
> .callback = video_detect_force_vendor,
> + .ident = "GIGABYTE GB-BXBT-2807",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
> + DMI_MATCH(DMI_PRODUCT_NAME, "GB-BXBT-2807"),
> + },
> + },
> + {
> .ident = "Sony VPCEH3U1E",
> .matches = {
> DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
> --
Applied as 5.11 material, thanks!
