[SOLVED] Lost network icon & internet access

After a 4.18 kernel upgrade yesterday I lost the network icon as well as internet access, WiFi is gone.
When I connect the ethernet cable it does not get detected either. I had installed GParted but funnily enough it does not launch anymore.
I have Mint 19.1 XFCE is dual boot with Windows. Before the problem I could see all the Windows files (NTFS), now I can’t anymore; a USB stick is not detected.
Some other things that have disappeared and that I am discovering bit by bit:

  • Synaptic
  • Rubbish bin

I tried

sudo service network-manager stop
rm /var/lib/NetworkManager/NetworkManager.state
service network-manager restart

No result.
I cannot believe I have to do a fresh reinstallation. The computer is working fine in that I have access to my files and can use them. When I use the live USB stick the network is visible & works fine, Wifi included.
Any suggestions?

Here is a print-out of inxi -Fxz:

Lenovo-G510 Kernel: 4.18.0-17-generic x86_64 bits: 64 
  compiler: gcc v: 7.3.0 Desktop: Xfce 4.12.3 Distro: Linux Mint 19.1 Tessa 
  base: Ubuntu 18.04 bionic 
Machine:
  Type: Laptop System: LENOVO product: 20238 v: Lenovo G510 serial: <filter> 
  Mobo: LENOVO model: INVALID v: 31900003Std serial: <filter> UEFI: LENOVO 
  v: 79CN46WW(V3.05) date: 12/23/2013 
Battery:
  ID-1: BAT1 charge: 13.2 Wh condition: 22.5/40.4 Wh (56%) 
  model: LENOVO PABAS0241231 status: Discharging 
CPU:
  Topology: Quad Core model: Intel Core i7-4700MQ bits: 64 type: MT MCP 
  arch: Haswell rev: 3 L2 cache: 6144 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 38310 
  Speed: 1093 MHz min/max: 800/3400 MHz Core speeds (MHz): 1: 1092 2: 1097 
  3: 1098 4: 1097 5: 1098 6: 1093 7: 1097 8: 1098 
Graphics:
  Device-1: Intel 4th Gen Core Processor Integrated Graphics vendor: Lenovo 
  driver: i915 v: kernel bus ID: 00:02.0 
  Device-2: AMD Mars [Radeon HD 8670A/8670M/8750M] vendor: Lenovo 
  driver: radeon v: kernel bus ID: 01:00.0 
  Display: x11 server: X.Org 1.19.6 driver: ati,modesetting,radeon 
  unloaded: fbdev,vesa resolution: 1366x768~60Hz 
  OpenGL: renderer: Mesa DRI Intel Haswell Mobile v: 4.5 Mesa 18.2.8 
  direct render: Yes 
Audio:
  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio 
  vendor: Lenovo driver: snd_hda_intel v: kernel bus ID: 00:03.0 
  Device-2: Intel 8 Series/C220 Series High Definition Audio vendor: Lenovo 
  driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
  Sound Server: ALSA v: k4.18.0-17-generic 
Network:
  Device-1: Broadcom and subsidiaries BCM43142 802.11b/g/n vendor: Lenovo 
  driver: wl v: kernel port: 4000 bus ID: 08:00.0 
  IF: wlp8s0 state: up mac: <filter> 
  Device-2: Qualcomm Atheros QCA8172 Fast Ethernet vendor: Lenovo 
  driver: alx v: kernel port: 3000 bus ID: 09:00.0 
  IF: enp9s0 state: down mac: <filter> 
Drives:
  Local Storage: total: 931.51 GiB used: 23.81 GiB (2.6%) 
  ID-1: /dev/sda vendor: Western Digital model: WD10JPCX-24UE4T0 
  size: 931.51 GiB 
Partition:
  ID-1: / size: 27.38 GiB used: 16.19 GiB (59.1%) fs: ext4 dev: /dev/sda9 
  ID-2: /home size: 18.21 GiB used: 6.58 GiB (36.1%) fs: ext4 
  dev: /dev/sda10 
Sensors:
  System Temperatures: cpu: 43.0 C mobo: N/A gpu: radeon temp: 25 C 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 304 Uptime: 1h 52m Memory: 5.73 GiB used: 2.00 GiB (35.0%) 
  Init: systemd runlevel: 5 Compilers: gcc: 7.3.0 Shell: bash v: 4.4.19 
  inxi: 3.0.27

Have you tried booting the earlier kernel ?

Yes, it did not work. I reinstalled Mint.