[Vostro 3549] Wireless key does not work on 14.04.2

[Po-Hsu Lin]

CID: 201408-15444 Vostro 3549

The wireless key does not work on this system.

Debugging information:
ubuntu@201408-15444:~$ 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...

Nothing could be detected by "sudo showkey -s"

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-31-generic 3.16.0-31.43~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-31.43~14.04.1-generic 3.16.7-ckt5
Uname: Linux 3.16.0-31-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Mar 20 04:24:01 2015
InstallationDate: Installed on 2015-03-20 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

[Po-Hsu Lin (cypressyew)]

Verified with 3.13.0-46, wireless key works as expected on it.

[Po-Hsu Lin (cypressyew)]

acpi_osi=\"!Windows 2012\" parameter can't make it work.

[Po-Hsu Lin (cypressyew)]

Add "options dell_laptop force_rfkill=1" into /etc/modprobe.d/dell.conf will make the key "partially" work

Before the key press:
ubuntu@201408-15444:~$ rfkill list
0: dell-wifi: Wireless LAN
 Soft blocked: no
 Hard blocked: no
1: dell-bluetooth: Bluetooth
 Soft blocked: no
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
3: brcmwl-0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
4: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

After the key press:
ubuntu@201408-15444:~$ rfkill list
0: dell-wifi: Wireless LAN
 Soft blocked: no
 Hard blocked: yes
1: dell-bluetooth: Bluetooth
 Soft blocked: no
 Hard blocked: yes
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
3: brcmwl-0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
4: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

I say it's partially working because if you re-enable the wireless and Bluetooth with the hot key, they're not hard blocked anymore, but Bluetooth indicator shows it's in OFF state.

Not sure if this is related to a not-working Bluetooth hardware (21D7).

[Po-Hsu Lin (cypressyew)]

dmidecode output for 201408-15444 Dell Vostro 3449

[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)]

Please try the kernel @ http://people.canonical.com/~alexhung/LP1442560/

This includes patches from http://people.canonical.com/~alexhung/dell-rbtn/ & http://people.canonical.com/~alexhung/dell-rbtn2/ that implements dell radio switch (ACPI Device = DELLABCE)

[Phidias (phidias-chiang)]

The patch in #7 fix the wireless hotkey.

[Alex Hung (alexhung)]

Fixed is included in Ubuntu-3.19.0-27.29