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-rw-r--r--drivers/acpi/osi.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c
index 8a8f43568510..b2a16ed7e81a 100644
--- a/drivers/acpi/osi.c
+++ b/drivers/acpi/osi.c
@@ -66,6 +66,14 @@ osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
* be removed if both new and old graphics cards are supported.
*/
{"Linux-Dell-Video", true},
+ /*
+ * Linux-Lenovo-NV-HDMI-Audio is used by BIOS to power on NVidia's HDMI
+ * audio device which is turned off for power-saving in Windows OS.
+ * This power management feature observed on some Lenovo Thinkpad
+ * systems which will not be able to output audio via HDMI without
+ * a BIOS workaround.
+ */
+ {"Linux-Lenovo-NV-HDMI-Audio", true},
};
static u32 acpi_osi_handler(acpi_string interface, u32 supported)