Suddenly... No wifi!

[Thomas Tanghus]

On Friday, 15 November 2019 20.16.22 CET Ralf Mardorf via ubuntu-users wrote:
> I'm not using NetworManager. Instead of taking a look at journalctl I
> would use systemctl status. I also wouldn't use the restart command,
> but restart by the stop and start commands and then check by using the
> status command:
> 
> sudo systemctl stop   NetworkManager.service
> sudo systemctl start  NetworkManager.service
> systemctl      status NetworkManager.service

It looks like it just connects to the cable I had to plug in.

$ sudo systemctl status NetworkManager.service
● NetworkManager.service - Network Manager
   Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2019-11-15 20:47:32 CET; 11s ago
     Docs: man:NetworkManager(8)
 Main PID: 6561 (NetworkManager)
    Tasks: 4 (limit: 4915)
   Memory: 3.7M
   CGroup: /system.slice/NetworkManager.service
           └─6561 /usr/sbin/NetworkManager --no-daemon

Nov 15 20:47:32 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847252.9995] dhcp4 (enp1s0): state changed unknown -> bound
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0011] device (enp1s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'assume')
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0098] device (enp1s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'assume')
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0102] device (enp1s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'assume')
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0109] manager: NetworkManager state is now CONNECTED_LOCAL
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0120] manager: NetworkManager state is now CONNECTED_SITE
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0122] policy: set 'New 802-3-ethernet connection' (enp1s0) as default for IPv4 routing and DNS
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0129] device (enp1s0): Activation: successful, device activated.
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0165] manager: NetworkManager state is now CONNECTED_GLOBAL
Nov 15 20:47:33 tanghus-Lenovo NetworkManager[6561]: <info>  [1573847253.0184] manager: startup complete
 
> Also consider to take a look at nmcli, by running
> 
> nmcli help
> man nmcli

That doesn't give a pretty view:

$ nmcli device wifi list
IN-USE  SSID  MODE  CHAN  RATE  SIGNAL  BARS  SECURITY

Nothing.

But while doing this jornalctl spat out something that might be useful. Too long 
to post here, so a link to my docs: https://cloud.tanghus.net/s/erJBTWqgEKXqLSz

An excerpt:

rfkill1: found Wi-Fi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.1/0000:02:00.0/ieee80211/phy0/rfkill1) (driver ath9k)
rfkill0: found Wi-Fi radio killswitch (at /sys/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/rfkill/rfkill0) (platform driver ideapad_acpi)

But what to  read from it I don't know.

> When googeling for "lenovo g570 airplane mode" some people mentioned to
> search the support side for BIOS updates. Dunno if there is a Linux and
> WiFi related update available.

He, as usual google delivers odd and different results, but ddg gave no results at all. I'll try to vary my searches.
-- 
/Thomas