ACPI: video: Add backlight=native DMI quirk for Acer Aspire 4810T

The Acer Aspire 4810T predates Windows 8, so it defaults to using
acpi_video# for backlight control, but this is non functional on
this model.

Add a DMI quirk to use the native backlight interface which does
work properly.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 8a541efc5675663afe636496a03c8f548b53823a..65cec7bb6d9615dace23df4c121d0fc5721e4e8e 100644 (file)
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -515,6 +515,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
                DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
                },
        },
+       {
+        .callback = video_detect_force_native,
+        /* Acer Aspire 4810T */
+        .matches = {
+               DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+               DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"),
+               },
+       },
        {
         .callback = video_detect_force_native,
         /* Acer Aspire 5738z */