[Lenovo] Unable to control Bluetooth with the wireless key on 12.04.5

[Po-Hsu Lin]

CID: 201301-12474

The Bluetooth connection cannot be controlled by the wireless hotkey

The wireless hotkey could turn the wireless on/off normally, but not the Bluetooth.

Steps:
1. Install 12.04.5 (3.13.0-33), boot to desktop
2. try to control the wireless / bluetooth connection by pressing the wireless hotkey (fn + f8)

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

Actual result:
* Only wireless could be controlled

Debugging information:
ubuntu@201301-12474:~$ sudo showkey -s
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)...
0xe0 0x73 0xe0 0xf3
^Ccaught signal 2, cleaning up...
ubuntu@201301-12474:~$

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.13.0-33-generic 3.13.0-33.58~precise1
ProcVersionSignature: Ubuntu 3.13.0-33.58~precise1-generic 3.13.11.4
Uname: Linux 3.13.0-33-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Mon Aug 11 01:59:25 2014
InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-lts-trusty
UpgradeStatus: No upgrade log present (probably fresh install)

[Po-Hsu Lin (cypressyew)]

ubuntu@201301-12474:~$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), .*$/keycode \2 = \3, state = \1/p'
keycode 36 = (keysym 0xff0d, Return), state = 0x0
keycode 246 = (keysym 0x1008ff95, XF86WLAN), state = 0x0
keycode 246 = (keysym 0x1008ff95, XF86WLAN), state = 0x0

[Po-Hsu Lin (cypressyew)]

Also affect 201308-14114 Lenovo W540

ubuntu@201308-14114:~$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), .*$/keycode \2 = \3, state = \1/p'
keycode 246 = (keysym 0x1008ff95, XF86WLAN), state = 0x10
keycode 246 = (keysym 0x1008ff95, XF86WLAN), state = 0x10
keycode 246 = (keysym 0x1008ff95, XF86WLAN), state = 0x10
keycode 246 = (keysym 0x1008ff95, XF86WLAN), state = 0x10
ubuntu@201308-14114:~$

[Po-Hsu Lin (cypressyew)]

Also affect 201309-14211 Lenovo ThinkPad T540p
rfkill list result after pressing the wireless key:
1: tpacpi_bluetooth_sw: Bluetooth
 Soft blocked: no
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: yes
 Hard blocked: no
62: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

[Po-Hsu Lin (cypressyew)]

Verified on 201309-14211 with 3.11.0-26 kernel

Wireless key could turn Bluetooth off, but with the following sequences:
ubuntu@201309-14211:~$ rfkill list
1: tpacpi_bluetooth_sw: Bluetooth
 Soft blocked: no
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
4: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

(press the hotkey, they all blocked)
ubuntu@201309-14211:~$ rfkill list
1: tpacpi_bluetooth_sw: Bluetooth
 Soft blocked: yes
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: yes
 Hard blocked: no

(press the hotkey again, it will unblock Wifi)
ubuntu@201309-14211:~$ rfkill list
1: tpacpi_bluetooth_sw: Bluetooth
 Soft blocked: yes
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no

(press it again, it will unblock Bluetooth but block Wifi)
ubuntu@201309-14211:~$ rfkill list
1: tpacpi_bluetooth_sw: Bluetooth
 Soft blocked: no
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: yes
 Hard blocked: no
5: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

(press one more time to get them back)
ubuntu@201309-14211:~$ rfkill list
1: tpacpi_bluetooth_sw: Bluetooth
 Soft blocked: no
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
5: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Po-Hsu Lin (cypressyew)]

For the system mentioned in comment #5
I found another bug report [1] that has something to do with it,
situation stated in comment #4 is identical to this case (wireless device on/off cycling).

But unfortunately, the link in comment #7 is unable to provide any clues now.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/773558