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

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Message-ID: <2784123.GhF2tcctEM@vostro.rjw.lan>
Date:	Thu, 24 Apr 2014 12:51:01 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Sitsofe Wheeler <sitsofe@...oo.com>
Cc:	Mantas Mikulėnas <grawity@...il.com>,
	Len Brown <lenb@...nel.org>,
	Robert Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION] Media keys cause "ACPI: \_SB_.ATKD: Unsupported event" on ASUS laptop

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);

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