"NetworkManager is not running/Networking disabled" after update

[Huckleberry Finn]

"Quick System Info".

inxi -M is as follows

:lipsrsealed:

[Eadwine Rose]

Find it in the menu, run it, paste in a reply. Don't edit.

[zoli62]

Find it in the menu, run it, paste in a reply. Don't edit.

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System:    Host: <filter> Kernel: 4.19.0-6-amd64 x86_64 bits: 64 compiler: gcc v: 8.3.0 
           parameters: BOOT_IMAGE=/boot/vmlinuz-4.19.0-6-amd64 
           root=UUID=<filter> ro quiet splash 
           Desktop: Xfce 4.16.0 tk: Gtk 3.24.24 info: xfce4-panel, plank wm: xfwm4 
           dm: LightDM 1.26.0 Distro: MX-21_x64 Wildflower October 21  2019 
           base: Debian GNU/Linux 11 (bullseye) 
Machine:   Type: Laptop System: LENOVO product: 20AT0030UK v: ThinkPad L440 serial: <filter> 
           Chassis: type: 10 serial: <filter> 
           Mobo: LENOVO model: 20AT0030UK v: 0B98401 Pro serial: <filter> UEFI: LENOVO 
           v: J4ET81WW(1.81) date: 08/14/2015 
Battery:   ID-1: BAT0 charge: 7.5 Wh condition: 70.8/71.3 Wh (99%) volts: 11.7/10.8 
           model: SMP 45N1149 type: Li-ion serial: <filter> status: Charging 
CPU:       Topology: Dual Core model: Intel Core i5-4200M bits: 64 type: MT MCP arch: Haswell 
           family: 6 model-id: 3C (60) stepping: 3 microcode: 28 L2 cache: 3072 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19953 
           Speed: 947 MHz min/max: 800/3100 MHz Core speeds (MHz): 1: 992 2: 867 3: 972 4: 911 
           Vulnerabilities: Type: itlb_multihit status: KVM: Vulnerable 
           Type: l1tf mitigation: PTE Inversion 
           Type: mds mitigation: Clear CPU buffers; SMT vulnerable 
           Type: meltdown mitigation: PTI 
           Type: spec_store_bypass 
           mitigation: Speculative Store Bypass disabled via prctl and seccomp 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, 
           STIBP: conditional, RSB filling 
           Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: Intel 4th Gen Core Processor Integrated Graphics vendor: Lenovo 
           driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0416 
           Display: x11 server: X.Org 1.20.11 driver: modesetting unloaded: fbdev,vesa 
           resolution: 1366x768~60Hz 
           OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 Mesa 20.3.5 
           compat-v: 3.0 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 chip ID: 8086:0c0c 
           Device-2: Intel 8 Series/C220 Series High Definition Audio vendor: Lenovo 
           driver: snd_hda_intel v: kernel bus ID: 00:1b.0 chip ID: 8086:8c20 
           Sound Server: ALSA v: k4.19.0-6-amd64 
Network:   Device-1: Intel Ethernet I217-V vendor: Lenovo driver: e1000e v: 3.2.6-k port: 5080 
           bus ID: 00:19.0 chip ID: 8086:153b 
           IF: eth0 state: down mac: <filter> 
           Device-2: Intel Wireless 7260 driver: iwlwifi v: kernel port: efa0 bus ID: 02:00.0 
           chip ID: 8086:08b2 
           IF: wlan0 state: up mac: <filter> 
Drives:    Local Storage: total: 447.13 GiB used: 9.82 GiB (2.2%) 
           ID-1: /dev/sda vendor: Kingston model: SA400S37480G size: 447.13 GiB block size: 
           physical: 512 B logical: 512 B speed: 6.0 Gb/s serial: <filter> rev: B1C2 scheme: GPT 
Partition: ID-1: / raw size: 27.77 GiB size: 27.09 GiB (97.52%) used: 9.82 GiB (36.3%) fs: ext4 
           dev: /dev/sda5 
           ID-2: swap-1 size: 7.81 GiB used: 0 KiB (0.0%) fs: swap swappiness: 15 (default 60) 
           cache pressure: 100 (default) dev: /dev/sda6 
Sensors:   System Temperatures: cpu: 41.0 C mobo: 24.0 C 
           Fan Speeds (RPM): cpu: 0 
Repos:     No active apt repos in: /etc/apt/sources.list 
           Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list 
           1: deb http://deb.debian.org/debian bullseye-updates main contrib non-free
           Active apt repos in: /etc/apt/sources.list.d/debian.list 
           1: deb http://deb.debian.org/debian bullseye main contrib non-free
           2: deb http://security.debian.org/debian-security bullseye-security main contrib non-free
           Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
           1: deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
           Active apt repos in: /etc/apt/sources.list.d/microsoft-edge-dev.list 
           1: deb [arch=amd64] https://packages.microsoft.com/repos/edge/ stable main
           Active apt repos in: /etc/apt/sources.list.d/mx.list 
           1: deb https://quantum-mirror.hu/mirrors/pub/mx-linux/packages/mx/repo/ bullseye main non-free
           2: deb https://quantum-mirror.hu/mirrors/pub/mx-linux/packages/mx/testrepo/ bullseye test
           Active apt repos in: /etc/apt/sources.list.d/opera-developer.list 
           1: deb https://deb.opera.com/opera-developer/ stable non-free #Opera Browser (final releases)
           Active apt repos in: /etc/apt/sources.list.d/opera-stable.list 
           1: deb https://deb.opera.com/opera-stable/ stable non-free #Opera Browser (final releases)
           No active apt repos in: /etc/apt/sources.list.d/various.list 
           Active apt repos in: /etc/apt/sources.list.d/vivaldi-snapshot.list 
           1: deb [arch=amd64] https://repo.vivaldi.com/snapshot/deb/ stable main
Info:      Processes: 216 Uptime: N/A Memory: 7.69 GiB used: 603.7 MiB (7.7%) Init: SysVinit 
           v: 2.96 runlevel: 5 default: 5 Compilers: gcc: 10.2.1 alt: 10 Shell: quick-system-in 
           running in: quick-system-in inxi: 3.0.36 

[Huckleberry Finn]

viewtopic.php?p=663302#p663302

[anyrug]

I had a corrupt installation of Network manager.
The internet wouldn't work at all but I managed to force the network card to work with this command:

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sudo dhclient eth0

Then you need to delete the broken network manager installation using synaptic. or try this:

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sudo apt-get remove --purge network-manager*
sudo apt autoremove
sudo apt update
sudo apt upgrade

Once the broken files have been removed and you are ready to reinstall network manager, install aptitude in the termina. This program will try to resolve installation issuesl:

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sudo apt-get install aptitude

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sudo aptitude install network-manager

After all this, my Network manager icon on the system tray was missing and I reinstalled from here:
https://packages.debian.org/buster/nm-tray

how do you install the last link about the icon in the tray. also thank You for the help I’m new at this