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[Vincas Dargis <1585886@xxxxxxxxxxxxxxxxxx>]

But wait, you said that WiFi is working? I cannot enable WiFi because
WiFi enable checkbox is not available after some reboots. So I man not
sure if this is same bug.

Either way, I've want to share some experiment:

First, I had to run this (to disable kill swich?):

rfkill unblock 0:

rfkill list
0: asus-wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no

        
*** FIRST REBOOT ***

Now I've rebooted. I can see WiFi switch in network manage KDE Plasma
applet (or whatever it is called). It's not on though as I am using
ethernet cable.

Attached syslog-0-reboot-with-wifi-enabled with some interesting lines:

Aug  4 12:40:19 vinco NetworkManager[2964]: <info>  [1470303619.9266] rfkill2: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/ieee80211/phy0/rfkill2) (driver iwlwifi)
Aug  4 12:40:19 vinco NetworkManager[2964]: <info>  [1470303619.9266] rfkill0: found WiFi radio killswitch (at /sys/devices/platform/asus-nb-wmi/rfkill/rfkill0) (platform driver asus-nb-wmi)

Aug  4 12:40:20 vinco NetworkManager[2964]: <info>  [1470303620.9939] manager: WiFi disabled by radio killswitch; disabled by state file
Aug  4 12:40:20 vinco NetworkManager[2964]: <info>  [1470303620.9939] manager: WWAN enabled by radio killswitch; enabled by state file

Aug  4 12:40:21 vinco NetworkManager[2964]: <info>  [1470303621.4851]
urfkill disappeared from the bus

Aug  4 12:40:29 vinco NetworkManager[2964]: <info>  [1470303629.8188] WiFi hardware radio set disabled
Aug  4 12:40:29 vinco NetworkManager[2964]: <info>  [1470303629.8188] WWAN hardware radio set enabled
Aug  4 12:40:29 vinco kernel: [   33.002054] iwlwifi 0000:04:00.0: RF_KILL bit toggled to disable radio.
Aug  4 12:40:29 vinco systemd[1]: Starting Load/Save RF Kill Switch Status...
Aug  4 12:40:29 vinco systemd[1]: Started Load/Save RF Kill Switch Status.

*** SECOND REBOOT ***

Now rebooted again. WiFi still visible in network manager applet.

Attached syslog-1-reboot-with-wifi-enabled-again . I see same
interesting lines as before, looks the same as first reboot:

Aug  4 12:52:15 vinco NetworkManager[2976]: <info>  [1470304335.4960] rfkill3: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/ieee80211/phy0/rfkill3) (driver iwlwifi)
Aug  4 12:52:15 vinco NetworkManager[2976]: <info>  [1470304335.4961] rfkill1: found WiFi radio killswitch (at /sys/devices/platform/asus-nb-wmi/rfkill/rfkill1) (platform driver asus-nb-wmi)

Aug  4 12:52:16 vinco NetworkManager[2976]: <info>  [1470304336.4929] manager: WiFi disabled by radio killswitch; disabled by state file
Aug  4 12:52:16 vinco NetworkManager[2976]: <info>  [1470304336.4929] manager: WWAN enabled by radio killswitch; enabled by state file

Aug  4 12:52:16 vinco NetworkManager[2976]: <info>  [1470304336.6760]
urfkill disappeared from the bus

Aug  4 12:52:25 vinco NetworkManager[2976]: <info>  [1470304345.8185] WiFi hardware radio set disabled
Aug  4 12:52:25 vinco NetworkManager[2976]: <info>  [1470304345.8186] WWAN hardware radio set enabled
Aug  4 12:52:25 vinco kernel: [   34.002468] iwlwifi 0000:04:00.0: RF_KILL bit toggled to disable radio.
Aug  4 12:52:25 vinco systemd[1]: Starting Load/Save RF Kill Switch Status...
Aug  4 12:52:25 vinco systemd[1]: Started Load/Save RF Kill Switch Status.

** THIR REBOOT **

Attaching syslog-2-reboot-with-wifi-disabled. *I cannot enable* WiFi
through network manager applet after third reboot. Checkbox is missing.
Some lines:

Aug  4 12:57:15 vinco systemd[1]: Starting Load/Save RF Kill Switch Status...
Aug  4 12:57:15 vinco systemd[1]: Starting Load/Save Screen Backlight Brightness of leds:asus::kbd_backlight...
Aug  4 12:57:15 vinco systemd[1]: Started Load/Save RF Kill Switch Status.

These systemd Load/Save RF Kill Swich lines ar now much earlier in log.

Aug  4 12:57:15 vinco kernel: [   16.219830] iwlwifi 0000:04:00.0:
RF_KILL bit toggled to disable radio.

This RF_KILL line is now much earlier in log too.

Aug  4 12:57:17 vinco NetworkManager[2953]: <info>  [1470304637.9248]
rfkill0: found WiFi radio killswitch (at /sys/devices/platform/asus-nb-
wmi/rfkill/rfkill0) (platform driver asus-nb-wmi)

There is only one "found WiFi radion killswich" line as opposed to
previous two logs!
/sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/ieee80211/phy0/rfkill3
is missing.

These last lines looks the same, thought "RF_KILL" and Load/Save RF KILL
when up to the beginning of the log:

Aug  4 12:57:18 vinco NetworkManager[2953]: <info>  [1470304638.6898] manager: WiFi disabled by radio killswitch; disabled by state file
Aug  4 12:57:18 vinco NetworkManager[2953]: <info>  [1470304638.6898] manager: WWAN enabled by radio killswitch; enabled by state file

Aug  4 12:57:19 vinco NetworkManager[2953]: <info>  [1470304639.2206]
urfkill disappeared from the bus

Aug  4 12:57:27 vinco NetworkManager[2953]: <info>  [1470304647.8223] WiFi hardware radio set disabled
Aug  4 12:57:27 vinco NetworkManager[2953]: <info>  [1470304647.8223] WWAN hardware radio set enabled

$ rfkill list
0: asus-wlan: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
1: asus-bluetooth: Bluetooth
        Soft blocked: yes
        Hard blocked: no

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https://bugs.launchpad.net/bugs/1585886

Title:
  WiFi indicator icon disappears in Ubuntu 16.04

Status in indicator-applet package in Ubuntu:
  Confirmed
Status in network-manager package in Ubuntu:
  New

Bug description:
  Dear all,

  Can someone confirm an occasionally missing WiFi indicator tray icon?

  Sometimes it happens that the icon is not displayed although the WiFi
  connection is working.

  Please see also the attached screenshot.

  Warmly,

  ~Robert

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