NetworkManager/rfkill disabled my wifi

I've experienced the following issue with NetworkManager/rfkill.

All of a sudden, my wifi connection was lost and NetworkManager Applet (version 1.8.22) unchecked "Enable Wi-Fi" option. I had to manually check it and then connect to my home wifi network again.

I've identified related log entries:

Sep 24 18:20:45 pavel-pc NetworkManager[582]: <warn>  [1569342045.9154] sup-iface[0x556cb636c130,wlan0]: connection disconnected (reason -3)
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9205] manager: rfkill: Wi-Fi now disabled by radio killswitch
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9206] device (wlan0): state change: activated -> unavailable (reason 'none', sys-iface-state: 'managed')
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9208] dhcp4 (wlan0): canceled DHCP transaction
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9208] dhcp4 (wlan0): state changed bound -> done
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9276] device (wlan0): set-hw-addr: set MAC address to 06:EA:00:C8:ED:A5 (scanning)
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9286] manager: NetworkManager state is now DISCONNECTED
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9369] device (p2p-dev-wlan0): state change: disconnected -> unavailable (reason 'supplicant-failed', sys-iface-state: 'managed')

It doesn't seem to happen regularly, but I'd still like to know if I'm doing something wrong.

I think the tool that really disabled wifi was this rfkill (the second line in my log), but why?

The content of /var/lib/NetworkManager/NetworkManager.state is:

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

What should I look for in order to make sure this won't happen again?

Thank you

I believe I have read that rfkill does not work well with tlp - especially in conjunction with wireless network.

Try checking the tlp article on the Arch Wiki.

2 Likes

Thank you.
I reviewed /etc/default/tlp, and disabled WIFI_PWR_ON_BAT option.
I also added a new file into /etc/NetworkManager/conf.d/ with the following content:

[connection]
wifi.powersave = 2

So it seems I've disabled some powersave wifi options. Let's see if it helps now.

1 Like

Please post the output of the following commands:

inxi -Fxxxz  && inxi -Fxxxz  | grep -q ANJ || echo check required && ls /usr/share/xsessions/ && head -n1 /var/log/pacman.log | cut -d " " -f1 | cut -c 2-11
hwinfo --netcard --bluetooth | grep -Ei "(speed|hotplug|model|status|cmd|file|detected|driver:)" | grep -v "Config S"  
journalctl -b -1 | grep -iE NetworkManager| grep '(regdom\|qos\|discon\|error\|seg\|fail\|broke\|reason\|warn\|change\|deauth)'

BIOS up to date?

Tested alternate kernels?

Rebooted your router?

1 Like

Thank you.
The outputs are:

System:    Host: pavel-pc Kernel: 4.19.69-1-MANJARO x86_64 bits: 64 compiler: gcc v: 9.1.0 Desktop: Xfce 4.14.1 
           tk: Gtk 3.24.10 info: xfce4-panel wm: xfwm4 dm: LightDM 1.30.0 Distro: Manjaro Linux 
Machine:   Type: Laptop System: Dell product: Latitude E5550 v: 01 serial: <filter> Chassis: type: 9 serial: <filter> 
           Mobo: Dell model: 0R6N9P v: A00 serial: <filter> UEFI: Dell v: A06 date: 04/10/2015 
Battery:   ID-1: BAT0 charge: 38.7 Wh condition: 42.4/51.7 Wh (82%) volts: 8.4/7.6 model: Samsung SDI DELL 7FR5JD9 
           type: Li-poly serial: <filter> status: Charging 
CPU:       Topology: Dual Core model: Intel Core i7-5600U bits: 64 type: MT MCP arch: Broadwell rev: 4 L2 cache: 4096 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 20760 
           Speed: 2536 MHz min/max: 500/3200 MHz Core speeds (MHz): 1: 1697 2: 1696 3: 1697 4: 1696 
Graphics:  Device-1: Intel HD Graphics 5500 vendor: Dell driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:1616 
           Device-2: NVIDIA GM108M [GeForce 840M] vendor: Dell driver: N/A bus ID: 03:00.0 chip ID: 10de:1341 
           Display: x11 server: X.Org 1.20.5 driver: intel unloaded: modesetting alternate: fbdev,vesa 
           resolution: 1920x1080~60Hz 
           OpenGL: renderer: Mesa DRI Intel HD Graphics 5500 (Broadwell GT2) v: 4.5 Mesa 19.1.5 compat-v: 3.0 
           direct render: Yes 
Audio:     Device-1: Intel Broadwell-U Audio vendor: Dell driver: snd_hda_intel v: kernel bus ID: 00:03.0 chip ID: 8086:160c 
           Device-2: Intel Wildcat Point-LP High Definition Audio vendor: Dell driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
           chip ID: 8086:9ca0 
           Sound Server: ALSA v: k4.19.69-1-MANJARO 
Network:   Device-1: Intel Ethernet I218-LM vendor: Dell driver: e1000e v: 3.2.6-k port: f080 bus ID: 00:19.0 
           chip ID: 8086:15a2 
           IF: eth0 state: down mac: <filter> 
           Device-2: Intel Wireless 7265 driver: iwlwifi v: kernel port: f040 bus ID: 02:00.0 chip ID: 8086:095a 
           IF: wlan0 state: up mac: <filter> 
Drives:    Local Storage: total: 476.94 GiB used: 20.56 GiB (4.3%) 
           ID-1: /dev/sda vendor: LITE-ON IT model: LCT-512L9S-11 2.5 7mm 512GB size: 476.94 GiB speed: 6.0 Gb/s 
           serial: <filter> rev: 10E scheme: GPT 
Partition: ID-1: / size: 86.01 GiB used: 11.00 GiB (12.8%) fs: ext4 dev: /dev/sda3 
           ID-2: /home size: 364.27 GiB used: 9.56 GiB (2.6%) fs: ext4 dev: /dev/dm-0 
           ID-3: swap-1 size: 8.00 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda2 
Sensors:   System Temperatures: cpu: 45.0 C mobo: 36.0 C sodimm: 32.0 C 
           Fan Speeds (RPM): cpu: 0 
Info:      Processes: 182 Uptime: 4m Memory: 15.56 GiB used: 1.52 GiB (9.8%) Init: systemd v: 242 Compilers: gcc: 9.1.0 
           Shell: bash v: 5.0.9 running in: xfce4-terminal inxi: 3.0.36 
xfce.desktop
2019-09-07
  Model: "Intel Dual Band Wireless-AC 7265"
  Driver: "iwlwifi"
  Device File: wlan0
  Link detected: yes
    Driver Status: iwlwifi is active
    Driver Activation Cmd: "modprobe iwlwifi"
  Model: "Intel Ethernet Connection (3) I218-LM"
  Driver: "e1000e"
  Device File: eth0
  Link detected: no
    Driver Status: e1000e is active
    Driver Activation Cmd: "modprobe e1000e"
  Model: "Intel Bluetooth Device"
  Hotplug: USB
  Driver: "btusb"
  Speed: 12 Mbps
    Driver Status: btusb is active
    Driver Activation Cmd: "modprobe btusb"
  1. I used journalctl -b -2 since that's when the problem occured
Sep 24 17:28:19 pavel-pc NetworkManager[582]: <info>  [1569338899.9037] hostname: hostname changed from (none) to "pavel-pc"
Sep 24 17:28:19 pavel-pc NetworkManager[582]: <info>  [1569338899.9759] device (eth0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Sep 24 17:28:20 pavel-pc NetworkManager[582]: <info>  [1569338900.2911] device (wlan0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Sep 24 17:28:20 pavel-pc NetworkManager[582]: <info>  [1569338900.6074] device (p2p-dev-wlan0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Sep 24 17:28:20 pavel-pc NetworkManager[582]: <info>  [1569338900.6080] device (p2p-dev-wlan0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:20 pavel-pc NetworkManager[582]: <info>  [1569338900.6083] device (wlan0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Sep 24 17:28:20 pavel-pc NetworkManager[582]: <warn>  [1569338900.6089] device (wlan0): wifi-scan: active scanning for networks due to profiles with wifi.hidden=yes. This makes you trackable
Sep 24 17:28:20 pavel-pc NetworkManager[582]: <warn>  [1569338900.6099] sup-iface: failed to cancel p2p connect: P2P cancel failed
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.3636] device (wlan0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.3808] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.3823] device (wlan0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.3854] device (wlan0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.3859] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.4004] device (wlan0): supplicant interface state: ready -> disconnected
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.4005] device (p2p-dev-wlan0): supplicant management interface state: ready -> disconnected
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.4045] device (wlan0): supplicant interface state: disconnected -> inactive
Sep 24 17:28:45 pavel-pc NetworkManager[582]: <info>  [1569338925.4045] device (p2p-dev-wlan0): supplicant management interface state: disconnected -> inactive
Sep 24 17:28:46 pavel-pc NetworkManager[582]: <info>  [1569338926.5985] device (wlan0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:46 pavel-pc NetworkManager[582]: <info>  [1569338926.6742] dhcp4 (wlan0): state changed unknown -> bound
Sep 24 17:28:46 pavel-pc NetworkManager[582]: <info>  [1569338926.6781] device (wlan0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:46 pavel-pc NetworkManager[582]: <info>  [1569338926.7033] device (wlan0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Sep 24 17:28:46 pavel-pc NetworkManager[582]: <info>  [1569338926.7037] device (wlan0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <warn>  [1569342045.9154] sup-iface[0x556cb636c130,wlan0]: connection disconnected (reason -3)
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9206] device (wlan0): state change: activated -> unavailable (reason 'none', sys-iface-state: 'managed')
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9208] dhcp4 (wlan0): state changed bound -> done
Sep 24 18:20:45 pavel-pc NetworkManager[582]: <info>  [1569342045.9369] device (p2p-dev-wlan0): state change: disconnected -> unavailable (reason 'supplicant-failed', sys-iface-state: 'managed')
Sep 24 18:25:38 pavel-pc NetworkManager[582]: <info>  [1569342338.0320] device (p2p-dev-wlan0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Sep 24 18:25:38 pavel-pc NetworkManager[582]: <info>  [1569342338.0324] device (wlan0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9151] device (wlan0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9323] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9326] device (wlan0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9346] device (wlan0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9349] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9551] device (wlan0): supplicant interface state: ready -> disconnected
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9551] device (p2p-dev-wlan0): supplicant management interface state: ready -> disconnected
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9594] device (wlan0): supplicant interface state: disconnected -> inactive
Sep 24 18:25:43 pavel-pc NetworkManager[582]: <info>  [1569342343.9595] device (p2p-dev-wlan0): supplicant management interface state: disconnected -> inactive
Sep 24 18:25:45 pavel-pc NetworkManager[582]: <info>  [1569342345.1012] device (wlan0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:47 pavel-pc NetworkManager[582]: <info>  [1569342347.9784] dhcp4 (wlan0): state changed unknown -> bound
Sep 24 18:25:47 pavel-pc NetworkManager[582]: <info>  [1569342347.9802] device (wlan0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:48 pavel-pc NetworkManager[582]: <info>  [1569342348.0007] device (wlan0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Sep 24 18:25:48 pavel-pc NetworkManager[582]: <info>  [1569342348.0010] device (wlan0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Sep 24 18:41:37 pavel-pc NetworkManager[582]: <info>  [1569343297.2526] device (wlan0): state change: activated -> unavailable (reason 'none', sys-iface-state: 'managed')
Sep 24 18:41:37 pavel-pc NetworkManager[582]: <info>  [1569343297.2529] dhcp4 (wlan0): state changed bound -> done
Sep 24 18:41:37 pavel-pc NetworkManager[582]: <info>  [1569343297.2619] device (p2p-dev-wlan0): state change: disconnected -> unavailable (reason 'supplicant-failed', sys-iface-state: 'managed')
Sep 24 18:43:35 pavel-pc NetworkManager[582]: <info>  [1569343415.0406] device (p2p-dev-wlan0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Sep 24 18:43:35 pavel-pc NetworkManager[582]: <info>  [1569343415.0409] device (wlan0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.8816] device (wlan0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9021] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9025] device (wlan0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9071] device (wlan0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9079] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9159] device (wlan0): supplicant interface state: ready -> disconnected
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9160] device (p2p-dev-wlan0): supplicant management interface state: ready -> disconnected
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9199] device (wlan0): supplicant interface state: disconnected -> inactive
Sep 24 18:43:39 pavel-pc NetworkManager[582]: <info>  [1569343419.9199] device (p2p-dev-wlan0): supplicant management interface state: disconnected -> inactive
Sep 24 18:43:41 pavel-pc NetworkManager[582]: <info>  [1569343421.1554] device (wlan0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:43 pavel-pc NetworkManager[582]: <info>  [1569343423.1950] dhcp4 (wlan0): state changed unknown -> bound
Sep 24 18:43:43 pavel-pc NetworkManager[582]: <info>  [1569343423.1985] device (wlan0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:43 pavel-pc NetworkManager[582]: <info>  [1569343423.2231] device (wlan0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Sep 24 18:43:43 pavel-pc NetworkManager[582]: <info>  [1569343423.2234] device (wlan0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Sep 24 19:36:12 pavel-pc NetworkManager[582]: <info>  [1569346572.0416] dhcp4 (wlan0): state changed bound -> done
Sep 24 19:36:12 pavel-pc NetworkManager[582]: <info>  [1569346572.0425] device (p2p-dev-wlan0): state change: disconnected -> unmanaged (reason 'unmanaged', sys-iface-state: 'managed')
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <info>  [1569346593.2978] hostname: hostname changed from (none) to "pavel-pc"
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <info>  [1569346593.3291] device (eth0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <info>  [1569346593.3328] device (wlan0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <info>  [1569346593.3813] device (p2p-dev-wlan0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <info>  [1569346593.3820] device (p2p-dev-wlan0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <info>  [1569346593.3823] device (wlan0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <warn>  [1569346593.3834] device (wlan0): wifi-scan: active scanning for networks due to profiles with wifi.hidden=yes. This makes you trackable
Sep 24 19:36:33 pavel-pc NetworkManager[7272]: <warn>  [1569346593.3868] sup-iface: failed to cancel p2p connect: P2P cancel failed
Sep 24 19:36:34 pavel-pc NetworkManager[7272]: <info>  [1569346594.4926] device (wlan0): supplicant interface state: ready -> disconnected
Sep 24 19:36:34 pavel-pc NetworkManager[7272]: <info>  [1569346594.4927] device (p2p-dev-wlan0): supplicant management interface state: ready -> disconnected
Sep 24 19:36:58 pavel-pc NetworkManager[7272]: <info>  [1569346618.5858] device (wlan0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 19:36:58 pavel-pc NetworkManager[7272]: <info>  [1569346618.5906] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 19:36:58 pavel-pc NetworkManager[7272]: <info>  [1569346618.5911] device (wlan0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Sep 24 19:36:58 pavel-pc NetworkManager[7272]: <info>  [1569346618.5940] device (wlan0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 19:36:58 pavel-pc NetworkManager[7272]: <info>  [1569346618.5944] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 19:36:58 pavel-pc NetworkManager[7272]: <info>  [1569346618.6292] device (wlan0): supplicant interface state: disconnected -> scanning
Sep 24 19:36:58 pavel-pc NetworkManager[7272]: <info>  [1569346618.6292] device (p2p-dev-wlan0): supplicant management interface state: disconnected -> scanning
Sep 24 19:36:59 pavel-pc NetworkManager[7272]: <info>  [1569346619.8980] device (wlan0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:02 pavel-pc NetworkManager[7272]: <info>  [1569346622.7648] dhcp4 (wlan0): state changed unknown -> bound
Sep 24 19:37:02 pavel-pc NetworkManager[7272]: <info>  [1569346622.7687] device (wlan0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:02 pavel-pc NetworkManager[7272]: <info>  [1569346622.8009] device (wlan0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:02 pavel-pc NetworkManager[7272]: <info>  [1569346622.8012] device (wlan0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:53 pavel-pc NetworkManager[7272]: <info>  [1569346673.4838] device (wlan0): state change: activated -> deactivating (reason 'user-requested', sys-iface-state: 'managed')
Sep 24 19:37:53 pavel-pc kernel: audit: type=1111 audit(1569346673.482:123): pid=7272 uid=0 auid=4294967295 ses=4294967295 msg='op=device-disconnect interface="wlan0" ifindex=3 pid=1054 uid=1000 result=success exe="/usr/bin/NetworkManager" hostname=? addr=? terminal=? res=success'
Sep 24 19:37:53 pavel-pc audit[7272]: USYS_CONFIG pid=7272 uid=0 auid=4294967295 ses=4294967295 msg='op=device-disconnect interface="wlan0" ifindex=3 pid=1054 uid=1000 result=success exe="/usr/bin/NetworkManager" hostname=? addr=? terminal=? res=success'
Sep 24 19:37:53 pavel-pc NetworkManager[7272]: <info>  [1569346673.4857] audit: op="device-disconnect" interface="wlan0" ifindex=3 pid=1054 uid=1000 result="success"
Sep 24 19:37:53 pavel-pc NetworkManager[7272]: <warn>  [1569346673.5104] sup-iface[0x5629c76af910,wlan0]: connection disconnected (reason -3)
Sep 24 19:37:53 pavel-pc NetworkManager[7272]: <info>  [1569346673.5107] device (wlan0): supplicant interface state: completed -> disconnected
Sep 24 19:37:53 pavel-pc NetworkManager[7272]: <info>  [1569346673.5107] device (p2p-dev-wlan0): supplicant management interface state: completed -> disconnected
Sep 24 19:37:53 pavel-pc NetworkManager[7272]: <info>  [1569346673.5109] device (wlan0): state change: deactivating -> disconnected (reason 'user-requested', sys-iface-state: 'managed')
Sep 24 19:37:53 pavel-pc NetworkManager[7272]: <info>  [1569346673.5110] dhcp4 (wlan0): state changed bound -> done
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.3860] device (wlan0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4029] device (wlan0): supplicant interface state: disconnected -> disabled
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4030] device (p2p-dev-wlan0): supplicant management interface state: disconnected -> disabled
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4031] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4035] device (wlan0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4091] device (wlan0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4099] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4278] device (wlan0): supplicant interface state: disabled -> disconnected
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4278] device (p2p-dev-wlan0): supplicant management interface state: disabled -> disconnected
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4374] device (wlan0): supplicant interface state: disconnected -> scanning
Sep 24 19:37:56 pavel-pc NetworkManager[7272]: <info>  [1569346676.4375] device (p2p-dev-wlan0): supplicant management interface state: disconnected -> scanning
Sep 24 19:37:57 pavel-pc NetworkManager[7272]: <info>  [1569346677.8167] device (wlan0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:59 pavel-pc NetworkManager[7272]: <info>  [1569346679.2412] dhcp4 (wlan0): state changed unknown -> bound
Sep 24 19:37:59 pavel-pc NetworkManager[7272]: <info>  [1569346679.2454] device (wlan0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:59 pavel-pc NetworkManager[7272]: <info>  [1569346679.2579] device (wlan0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Sep 24 19:37:59 pavel-pc NetworkManager[7272]: <info>  [1569346679.2582] device (wlan0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Sep 24 19:38:25 pavel-pc NetworkManager[7272]: <info>  [1569346705.6189] dhcp4 (wlan0): state changed bound -> done
Sep 24 19:38:25 pavel-pc NetworkManager[7272]: <info>  [1569346705.6199] device (p2p-dev-wlan0): state change: disconnected -> unmanaged (reason 'unmanaged', sys-iface-state: 'managed')
  1. info about my BIOS:
$ sudo dmidecode --type bios
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
	Vendor: Dell Inc.
	Version: A06
	Release Date: 04/10/2015
	Address: 0xF0000
	Runtime Size: 64 kB
	ROM Size: 12288 kB
	Characteristics:
		PCI is supported
		PNP is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		EDD is supported
		5.25"/1.2 MB floppy services are supported (int 13h)
		3.5"/720 kB floppy services are supported (int 13h)
		3.5"/2.88 MB floppy services are supported (int 13h)
		Print screen service is supported (int 5h)
		8042 keyboard services are supported (int 9h)
		Serial services are supported (int 14h)
		Printer services are supported (int 17h)
		ACPI is supported
		USB legacy is supported
		Smart battery is supported
		BIOS boot specification is supported
		Function key-initiated network boot is supported
		Targeted content distribution is supported
		UEFI is supported
	BIOS Revision: 5.6

Handle 0xF0CB, DMI type 13, 22 bytes
BIOS Language Information
	Language Description Format: Long
	Installable Languages: 1
		en|US|iso8859-1
	Currently Installed Language: en|US|iso8859-1

Not tested any other kernels. Not rebooted my router, don't think there was a problem, the router is sufficiently new (~ half a year).

The only change related to networking was renaming interface names using udev:
/etc/udev/rules.d/:

SUBSYSTEM=="net", DEVPATH=="/devices/pci0000:00/0000:00:1c.3/0000:02:00.0/net/*", NAME="wlan0"
SUBSYSTEM=="net", DEVPATH=="/devices/pci0000:00/0000:00:19.0/net/*", NAME="eth0"

My BIOS was not updated, so I downloaded version A21 from Dell website, so my actual BIOS is:

$ sudo dmidecode --type bios
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
	Vendor: Dell Inc.
	Version: A21
	Release Date: 05/16/2019
	Address: 0xF0000
	Runtime Size: 64 kB
	ROM Size: 12288 kB
	Characteristics:
		PCI is supported
		PNP is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		EDD is supported
		5.25"/1.2 MB floppy services are supported (int 13h)
		3.5"/720 kB floppy services are supported (int 13h)
		3.5"/2.88 MB floppy services are supported (int 13h)
		Print screen service is supported (int 5h)
		8042 keyboard services are supported (int 9h)
		Serial services are supported (int 14h)
		Printer services are supported (int 17h)
		ACPI is supported
		USB legacy is supported
		Smart battery is supported
		BIOS boot specification is supported
		Function key-initiated network boot is supported
		Targeted content distribution is supported
		UEFI is supported
	BIOS Revision: 65.21

Handle 0xF0CB, DMI type 13, 22 bytes
BIOS Language Information
	Language Description Format: Long
	Installable Languages: 1
		en|US|iso8859-1
	Currently Installed Language: en|US|iso8859-1

Internet connectivity troubleshooting 101. Whenever you experience connectivity issues:

  1. reboot both your computer and router.

  2. test different kernels.

Is this likely to solve your issues? perhaps not, but they are the simplest and most effective troubleshooting steps you should preform before even considering opening a help thread.

I agree, and I also said it did not happen regularly. I don't really consider it a "problem" (not a big one anyway) when it happens rarely (once in my case), that's why I didn't take any of these steps. But I'm still curious why it happened and that's why I asked here, cos I might have set up something wrong on my machine or simply missed something important in the log or simply failed to find out the right course of action.

If this only occurred once it could have been a random sunspot or solar flare. :crazy_face:

It's pretty hard to find answers for a very intermittent issue, especially if it was only a one time occurrence.

1 Like

Sure, I'm well aware of that + I know a bit more after you pointed me towards some things that could be changed or checked.
I'll consider it closed.
Thank you for helping out.

1 Like

You're welcome.

Sorry I was not able to give you a more definitive answer, but tracking down issues of such a transient nature is often fruitless. If it starts to become a regular occurrence simply repost on this thread and I'll try to take a deeper look.

1 Like

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