[Dell Inspiron 5437] Wireless key does not work on this system

[Po-Hsu Lin]

CID: 201305-13673 Dell Inspiron 5437

The wireless hotkey does not work on this system

Steps:
1. Install 14.04 + update (3.13.0-30), boot to desktop
2. Try to control wireless / BT with the hotkey

Expected result:
* Wireless / BT could be controlled by the hotkey

Actual result:
* Hotkey is not working

Debugging information:
ubuntu@201305-13673:~$ sudo showkey -k
kb mode was ?UNKNOWN?
[ if you are trying this under X, it might not work
since the X server is also reading /dev/console ]

press any key (program terminates 10s after last keypress)...
keycode 28 release
keycode 240 press
keycode 240 release
keycode 240 press
keycode 240 release
^Ccaught signal 2, cleaning up...

KeyPress event, serial 37, synthetic NO, window 0x3a00001,
    root 0x2c0, subw 0x0, time 199006, (-357,353), root:(430,405),
    state 0x0, keycode 248 (keysym 0x0, NoSymbol), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x3a00001,
    root 0x2c0, subw 0x0, time 199006, (-357,353), root:(430,405),
    state 0x0, keycode 248 (keysym 0x0, NoSymbol), same_screen YES,
    XLookupString gives 0 bytes:
    XFilterEvent returns: False

nothing from sudo showkey -s

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-30-generic 3.13.0-30.55
ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 1638 F.... pulseaudio
 /dev/snd/controlC1: ubuntu 1638 F.... pulseaudio
CRDA:
 country TW:
  (2402 - 2472 @ 40), (3, 27)
  (5270 - 5330 @ 40), (3, 17), DFS
  (5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Wed Jul 16 01:56:06 2014
HibernationDevice: RESUME=UUID=67674077-ce03-4513-b8be-b3e9bdd8840d
InstallationDate: Installed on 2014-07-16 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Inspiron 5437
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic.efi.signed root=UUID=e56f47e4-b04b-4702-b89f-59e1c08572c4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-30-generic N/A
 linux-backports-modules-3.13.0-30-generic N/A
 linux-firmware 1.127.4
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/14/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.vendor: Dell Inc.
dmi.board.version: A07
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd11/14/2013:svnDellInc.:pnInspiron5437:pvrNotSpecified:rvnDellInc.:rn:rvrA07:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 5437
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Po-Hsu Lin (cypressyew)]

This issue could be fixed by adding a kernel parameter:
acpi_osi=\"!Windows 2012\"

Verified with the kernel I built:
http://people.canonical.com/~phlin/kernel/bug-1342548-wl-key/
It works with 14.04 on this system.

However, I am not familiar kernel patching workflow and I am not sure if there is any other concerns for not patching in this way, so I will just leave the patch here.

Thanks

[Liming Wang (wangliming)]

One similar patch has been submitted to the mainline kernel:

http://www.spinics.net/lists/linux-acpi/msg50338.html

It also fixes the wireless hotkey issue.
I think we could submit the Lin's patch to mainline.

[Liming Wang (wangliming)]

The similar bug is LP#1288161

[Liming Wang (wangliming)]

It seems that with win8 capability, wifi hotkey doesn't work well. I will submit one patch to mainline to resolve the bug.
@anthony Wong, please send the log of the "sudo lsinput" to me.

[Po-Hsu Lin (cypressyew)]

sudo lsinput log from 201305-13673

[Liming Wang (wangliming)]

@anthony Wong, thanks a lot!

I need more log from following commands:
1. sudo input-events 5
2. acpi_listen
3. sudo showkey -s

Please press wifi hotkey after executing above commands.

[Po-Hsu Lin (cypressyew)]

ubuntu@201305-13673:~$ sudo input-events 7
/dev/input/event7
   bustype : BUS_HOST
   vendor : 0x0
   product : 0x0
   version : 0
   name : "Dell WMI hotkeys"
   phys : "wmi/input0"
   bits ev : EV_SYN EV_KEY EV_MSC

waiting for events
(Nothing captured)

Also, nothing captured from acpi_listen, and sudo showkey -s

[Liming Wang (wangliming)]

But in your first message, "showkey -k“ has captured the keycode 240? Just like:
...
keycode 240 press
keycode 240 release
...

but "showkey -s" doesn't return anything? So, it's weird.

[Po-Hsu Lin (cypressyew)]

Yes, it's weird, this behaviour could be reproduced on those affected Dell systems.

[Edward Lin (airken)]

Quirk for Dell Inspiron 7737/7537/5437/3437 and Vostro 3446 is accepted by upstream.
And the patch will be merged in 3.18.

http://permalink.gmane.org/gmane.linux.acpi.devel/70627

[Liming Wang (wangliming)]

OK, so now we should backport the patches to our kernel.

[Adam Lee (adam8157)]

patch for this bug and Bug 1362388 is in mainline now.

[Po-Hsu Lin (cypressyew)]

Verified with 201305-13673 Dell Inspiron 5437 again, it works with 14.04.1 + update (3.13.0-46)
Thanks!