From: Alex Hung alex.hung@canonical.com
This patch has been added to the stable tree. If you have any objections, please let us know.
===============
[ Upstream commit e34fbbac669de0b7fb7803929d0477f35f6e2833 ]
Some system supports hybrid graphics and its discrete VGA does not have any connectors and therefore has no _DOD method.
Signed-off-by: Alex Hung alex.hung@canonical.com Reviewed-by: Aaron Lu aaron.lu@intel.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/acpi/video.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index cc79d3fedfb2..493811b895bd 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -1276,6 +1276,9 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video) union acpi_object *dod = NULL; union acpi_object *obj;
+ if (!video->cap._DOD) + return AE_NOT_EXIST; + status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); if (!ACPI_SUCCESS(status)) { ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));