Re: [REGRESSION] Media keys cause "ACPI: \_SB_.ATKD: Unsupported event" on ASUS laptop

Rafael J. Wysocki
2014-04-24T10:51:01Z

On Thursday, April 24, 2014 06:21:52 AM Sitsofe Wheeler wrote:
> On Thu, Apr 17, 2014 at 02:11:15PM +0300, Mantas Mikulėnas wrote:
> > After commit 1a699476e258 [two months ago], Linux has stopped
> > recognizing the media & function keys on my laptop's keyboard (the
> > laptop is ASUS K52JT.206).
> >
> > When I press any of the Fn keys (Play/Pause, Stop, Prev, Next, Vol+,
> > Vol-, Mute, WiFi, Brightness +/-...), I get the following messages in dmesg:
> >
> > | ACPI: \_SB_.ATKD: Unsupported event type 0x45
> > | ACPI: \_SB_.ATKD: Unsupported event type 0x43
> > | ACPI: \_SB_.ATKD: Unsupported event type 0x40
> > | etc.
>
> I'm seeing the same problem with an EeePC 900's volume and brightness
> keys:
> [ 90.098518] ACPI: \_SB_.ATKD: Unsupported event type 0x14
> [ 90.785202] ACPI: \_SB_.ATKD: Unsupported event type 0x15
> [ 457.062072] ACPI: \_SB_.ATKD: Unsupported event type 0x2e
> [ 457.926754] ACPI: \_SB_.ATKD: Unsupported event type 0x2d
> [ 458.418740] ACPI: \_SB_.ATKD: Unsupported event type 0x2c
> [ 458.821482] ACPI: \_SB_.ATKD: Unsupported event type 0x2b
> [ 459.240896] ACPI: \_SB_.ATKD: Unsupported event type 0x2a

Does this patch help:

---
drivers/acpi/bus.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

Index: linux-pm/drivers/acpi/bus.c
===================================================================
--- linux-pm.orig/drivers/acpi/bus.c
+++ linux-pm/drivers/acpi/bus.c
@@ -380,9 +380,8 @@ static void acpi_bus_notify(acpi_handle
break;

default:
- acpi_handle_warn(handle, "Unsupported event type 0x%x\n", type);
- ost_code = ACPI_OST_SC_UNRECOGNIZED_NOTIFY;
- goto err;
+ acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
+ break;
}

adev = acpi_bus_get_acpi_device(handle);