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

[Sitsofe Wheeler <sitsofe@yahoo.com>]

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


> In the past (v3.14 and earlier), those used to be reported as ACPI and
> input events. From `acpi_listen` on a good kernel:
> 
> | hotkey ATK0100:00 00000045 00000000
> | cd/play CDPLAY 00000080 00000000 K
> |
> | hotkey ATK0100:00 00000031 0000000d
> | button/volumedown VOLDN 00000080 00000000 K
> |
> | hotkey ATK0100:00 00000016 00000000
> |
> | hotkey ATK0100:00 00000025 00000001
> 
> Bisect output:
> 
> 1a699476e25814343766342672c655fb135224cc is the first bad commit
> commit 1a699476e25814343766342672c655fb135224cc
> Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Date:   Thu Feb 6 13:58:13 2014 +0100
> 
>     ACPI / hotplug / PCI: Hotplug notifications from acpi_bus_notify()
> 
>     Since acpi_bus_notify() is executed on all notifications for all
>     devices anyway, make it execute acpi_device_hotplug() for all
>     hotplug events instead of installing notify handlers pointing to
>     the same function for all hotplug devices.
>     [...]
> 
> * Linux 3.14.0-rc1-00023-g1a699476e258 (bad)
> * Linux 3.14.0-rc1-00022-g5e6f236c2631 (good)
> 
> (I'm not quite sure why they show up as 3.14-rc1 if they're after 3.14?)
> 
> The kernel config is close to that of stock Arch Linux, except with
> entirely irrelevant devices disabled (PATA, SCSI, tuner, etc.)

Adding email addresses recommended by get_maintainer.pl to see if that
helps this to get noticed...

-- 
Sitsofe | http://sucs.org/~sits/