Good day to all,

I'm trying to use the adapters TPLink WN722N on a desktop with Debian 9.

I installed the firmware:

apt-get install firmware-realtek

And the Network Manager

apt-get install network-manager-gnome

I open the applet in system tray to select wireless network in the list.

After to click the desired network I enter the password and click "connect" button.

He tries to connect for a while but can't.

Searching on Google I found a tip to include this command in /etc/NetworkManager.conf

[device]
wifi.scan-rand-mac-address=0

Now the file /etc/NetworkManager.conf is:

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

[device]
wifi.scan-rand-mac-address=0

Now it connects to the network but does not navigate. :-(

It is not creating the file /etc/resolv.conf

which indicates the Gateway address.

Continuing my searches, I found information that there is a conflict between Wicd and NetworkManager.

I decided to remove Wicd with the commands:

apt-get remove wicd

sudo apt-get remove --auto-remove wicd

But it did not solve the problem, and even the ifconfig command is not working anymore.

I think I just made a mess. :-(

Any tip how to fix it?

Thank you,
Akvo

try what is the output of

Hi,

Thank you for your attention.

Return of commands: (I just replaced the MAC address)

ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp0s20: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
link/ether ab:cd:fg:hi:jk:lm brd ff:ff:ff:ff:ff:ff
3: wlx10feed1e8c9c: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
link/ether noq:rs:tu:vw:xy brd ff:ff:ff:ff:ff:ff

lspci
00:00.0 RAM memory: NVIDIA Corporation C51 Host Bridge (rev a2)
00:00.1 RAM memory: NVIDIA Corporation C51 Memory Controller 0 (rev a2)
00:00.2 RAM memory: NVIDIA Corporation C51 Memory Controller 1 (rev a2)
00:00.3 RAM memory: NVIDIA Corporation C51 Memory Controller 5 (rev a2)
00:00.4 RAM memory: NVIDIA Corporation C51 Memory Controller 4 (rev a2)
00:00.5 RAM memory: NVIDIA Corporation C51 Host Bridge (rev a2)
00:00.6 RAM memory: NVIDIA Corporation C51 Memory Controller 3 (rev a2)
00:00.7 RAM memory: NVIDIA Corporation C51 Memory Controller 2 (rev a2)
00:02.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1)
00:04.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1)
00:05.0 VGA compatible controller: NVIDIA Corporation C51 [GeForce 6150 LE] (rev a2)
00:09.0 RAM memory: NVIDIA Corporation MCP51 Host Bridge (rev a2)
00:0a.0 ISA bridge: NVIDIA Corporation MCP51 LPC Bridge (rev a3)
00:0a.1 SMBus: NVIDIA Corporation MCP51 SMBus (rev a3)
00:0a.2 RAM memory: NVIDIA Corporation MCP51 Memory Controller 0 (rev a3)
00:0b.0 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3)
00:0b.1 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3)
00:0d.0 IDE interface: NVIDIA Corporation MCP51 IDE (rev a1)
00:0e.0 IDE interface: NVIDIA Corporation MCP51 Serial ATA Controller (rev a1)
00:0f.0 IDE interface: NVIDIA Corporation MCP51 Serial ATA Controller (rev a1)
00:10.0 PCI bridge: NVIDIA Corporation MCP51 PCI Bridge (rev a2)
00:10.1 Audio device: NVIDIA Corporation MCP51 High Definition Audio (rev a2)
00:14.0 Bridge: NVIDIA Corporation MCP51 Ethernet Controller (rev a3)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Miscellaneous Control

lsusb
Bus 001 Device 002: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

I think there is a conflict between Wicd and the Networkmanager.

In your opinion what is better to use, Networkmanager or Wicd?

Thank you,
Markos

Try installing firmware-atheros as that is not a realtek device