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    Subject[PATCH 4.9 18/95] ACPI / video: Add quirk to force acpi-video backlight on Samsung 670Z5E
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Hans de Goede <hdegoede@redhat.com>

    commit bbf038618a24d72e2efc19146ef421bb1e1eda1a upstream.

    Just like many other Samsung models, the 670Z5E needs to use the acpi-video
    backlight interface rather then the native one for backlight control to
    work, add a quirk for this.

    Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1557060
    Cc: All applicable <stable@vger.kernel.org>
    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/acpi/video_detect.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    --- a/drivers/acpi/video_detect.c
    +++ b/drivers/acpi/video_detect.c
    @@ -214,6 +214,15 @@ static const struct dmi_system_id video_
    },
    },
    {
    + /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
    + .callback = video_detect_force_video,
    + .ident = "SAMSUNG 670Z5E",
    + .matches = {
    + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
    + DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
    + },
    + },
    + {
    /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
    .callback = video_detect_force_video,
    .ident = "SAMSUNG 730U3E/740U3E",

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