Like all of the other *30 ThinkPad models, the W530 has a broken acpi-video
backlight control. Note in order for this to actually fix things on the
ThinkPad W530 the commit titled:
"nouveau: Don't check acpi_video_backlight_support() before registering 
backlight"
is also needed.

https://bugzilla.redhat.com/show_bug.cgi?id=1093171

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
 drivers/acpi/video.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 47b7e21..8309100 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -515,6 +515,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = 
{
                },
        },
        {
+        .callback = video_set_use_native_backlight,
+        .ident = "ThinkPad W530",
+        .matches = {
+               DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+               DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"),
+               },
+       },
+       {
        .callback = video_set_use_native_backlight,
        .ident = "ThinkPad X1 Carbon",
        .matches = {
-- 
1.9.0

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