[Dell Inspiron 7437] Wireless key does not work on 14.04.1

[Po-Hsu Lin]

CID: 201307-13932 Dell Inspiron 7437

The wireless key does not work on this system.
Nothing could be detected with "sudo showkey -s"

ubuntu@201307-13932:~$ 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
^Ccaught signal 2, cleaning up...

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-48-generic 3.13.0-48.80
ProcVersionSignature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16
Uname: Linux 3.13.0-48-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 1574 F.... pulseaudio
 /dev/snd/controlC1: ubuntu 1574 F.... pulseaudio
CRDA:
 country TW:
  (2402 - 2472 @ 40), (3, 27)
  (5270 - 5330 @ 40), (3, 17), DFS
  (5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Tue Mar 24 04:45:23 2015
HibernationDevice: RESUME=UUID=bd120b66-ea6e-4f9b-b52a-021340e042d3
InstallationDate: Installed on 2015-03-24 (0 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Dell Inc. Inspiron 7437
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-48-generic root=UUID=b603f1fd-caaa-4688-aff0-288141b61d50 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-48-generic N/A
 linux-backports-modules-3.13.0-48-generic N/A
 linux-firmware 1.127.11
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/31/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA03:bd10/31/2013:svnDellInc.:pnInspiron7437:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Inspiron 7437
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Po-Hsu Lin (cypressyew)]

WORKAROUND:
it work with the acpi_osi=\"!Windows 2012\" parameter added to grub

[Po-Hsu Lin (cypressyew)]

BTW, it does not work with 3.16.0-33-generic kernel as well.

[Keng-Yu Lin (lexical)]

#define KEY_UNKNOWN 240

since Ubuntu moved from udev (keymap) to systemd (hwdb), the mapping may need updated.

[Alex Hung (alexhung)]

https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1434442/comments/7

[Alex Hung (alexhung)]

The workaround acpi_osi=\"!Windows 2012\" will not work in kernel 4.1 or later as ACPI's _REV is going to be 2.