Realtek TP link wn-722n

Support Network
1

Hi, here my first post on new forum.
I have installed successfully the driver rtl8188eus from (https://github.com/aircrack-ng/rtl8188eus.git) for a Tp link wn722n wifi adapter.

lsusb recognize the adapter the I’ve tried to use for connecting to internet but
sudo iw dev wlan1 scan
gives me
command failed: No such device (-19)

Some months ago I used successfully on the the same system and I remember there was some kind of gui appearing when the wifi adapter was connected and I could use it to connect to internet via the adapter, the I had to format the system and now I have no idea how to use it again. Hope somebody can help. Thanks a lot

iwconfig output where wlan0 is my internal wifi card and wlan1 is the adapter:

wlan0     IEEE 802.11  ESSID:"portobello"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:37:B7:0A:26:EE   
          Bit Rate=130 Mb/s   Tx-Power=22 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=49/70  Signal level=-61 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:2  Invalid misc:98   Missed beacon:0

wlan1     unassociated  ESSID:""  Nickname:"<WIFI@REALTEK>"
          Mode:Auto  Frequency=2.412 GHz  Access Point: Not-Associated   
          Sensitivity:0/0  
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

inxi -Fxxxza --no-host :

System:    Kernel: 5.9.1-1-MANJARO x86_64 bits: 64 compiler: N/A 
           parameters: BOOT_IMAGE=/boot/vmlinuz-5.9-x86_64 root=UUID=25cd00b7-5e78-4989-a540-b52f6235b902 rw quiet 
           udev.log_priority=3 
           Desktop: Xfce 4.14.2 tk: Gtk 3.24.20 info: xfce4-panel wm: xfwm4 dm: LightDM 1.30.0 Distro: Manjaro Linux 
Machine:   Type: Laptop System: Dell product: Latitude E5450 v: N/A serial: <filter> Chassis: type: 9 serial: <filter> 
           Mobo: Dell model: 0MVKK7 v: A00 serial: <filter> UEFI: Dell v: A10 date: 09/01/2015 
Battery:   ID-1: BAT0 charge: 15.1 Wh condition: 27.9/51.7 Wh (54%) volts: 7.5/7.6 model: Samsung SDI DELL 1KY05D9 
           type: Li-poly serial: <filter> status: Discharging 
CPU:       Topology: Dual Core model: Intel Core i7-5600U bits: 64 type: MT MCP arch: Broadwell family: 6 model-id: 3D (61) 
           stepping: 4 microcode: 2F L2 cache: 4096 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 20760 
           Speed: 1875 MHz min/max: 500/3200 MHz Core speeds (MHz): 1: 2594 2: 2596 3: 2594 4: 2594 
           Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
           Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
           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: srbds mitigation: Microcode 
           Type: tsx_async_abort mitigation: Clear CPU buffers; SMT vulnerable 
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 alternate: nouveau bus ID: 03:00.0 
           chip ID: 10de:1341 
           Device-3: Sunplus Innovation type: USB driver: uvcvideo bus ID: 1-1.6:4 chip ID: 1bcf:2b8d 
           Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: intel alternate: fbdev,vesa display ID: :0.0 
           screens: 1 
           Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2") s-diag: 582mm (22.9") 
           Monitor-1: eDP-1 res: 1920x1080 hz: 60 dpi: 158 size: 309x174mm (12.2x6.9") diag: 355mm (14") 
           OpenGL: renderer: Mesa Intel HD Graphics 5500 (BDW GT2) v: 4.6 Mesa 20.1.8 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: k5.9.1-1-MANJARO 
Network:   Device-1: Intel Ethernet I218-LM vendor: Dell driver: e1000e v: kernel 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> 
           Device-3: TP-Link TL-WN722N v2/v3 [Realtek RTL8188EUS] type: USB driver: r8188eu bus ID: 2-2:2 chip ID: 2357:010c 
           serial: <filter> 
           IF: wlan1 state: down mac: <filter> 
Drives:    Local Storage: total: 238.47 GiB used: 196.27 GiB (82.3%) 
           SMART Message: Required tool smartctl not installed. Check --recommends 
           ID-1: /dev/sda vendor: Samsung model: SSD PM851 2.5 7mm 256GB size: 238.47 GiB block size: physical: 512 B 
           logical: 512 B speed: 6.0 Gb/s serial: <filter> rev: 8D0Q scheme: GPT 
Partition: ID-1: / raw size: 238.18 GiB size: 233.44 GiB (98.01%) used: 196.27 GiB (84.1%) fs: ext4 dev: /dev/sda2 
Swap:      Kernel: swappiness: 60 (default) cache pressure: 100 (default) 
           ID-1: swap-1 type: file size: 4.00 GiB used: 0 KiB (0.0%) priority: -2 file: /swapfile 
Sensors:   System Temperatures: cpu: 52.0 C mobo: 40.0 C sodimm: 39.0 C 
           Fan Speeds (RPM): cpu: 0 
Info:      Processes: 212 Uptime: 34m Memory: 7.67 GiB used: 2.68 GiB (34.9%) Init: systemd v: 246 Compilers: gcc: 10.2.0 
           clang: 10.0.1 Packages: pacman: 1364 lib: 363 flatpak: 0 Shell: fish v: 3.1.2 running in: server inxi: 3.1.05
2

For one you probably want to use the packages in the AUR as opposed to manually building.
https://aur.archlinux.org/packages/?K=8188
For another … 5.9 is a pretty new kernel … unless you have a specific reason to chase it you might want something else … for example nvidia doesnt really work on 5.9.

3

Thanks
Actually I change my kernel just because the system suggests me to do it, every time there is a new kernel, so I imagined it was a good choice to do so. I’ll stick to a older one something and check it again.

1 Like
5

I’ve changed kernel for 4.19
but still iw dev wlan1 scan gives me No such device.

6

Have you tried 5.4 LTS already?

7

So it seems everything is working now.
Yes I changed to kernel 5.4 but I think the problem wasthat I was not using the right command!
Thanks to some tutorial (I cant’ post link, why?)
I’ve found my way on connecting through my wifi adapter to a wpa protocol.
Thanks for your help, but I think the solution was not exactly just changing the kernel.

8

I post here for future references the commands I used for getting my connection works, assuming that I’ve installed the drivers on the best kernel I can use.

lsusb will tell if the wifi adapter is connected and recognized;

ifconfig will tell the name of device, it is wlan1 in my case;

sudo ip link set wlan1 up will bring the interface up;

sudo iwlist wlan1 scan will use the interface for available network;

in my case i’m connecting to a wpa protected connection, so I will need:
`wpa_passphrase ‘ESSID’ ‘password’ > wpa_supplicant.conf’ will crate a configuration file with ESSID name (it will be shown with the precedent command) and the password of the connection;

‘wpa_supplicant -i wlan1 -c wpa_supplicant.conf -D wext’ where -i is the interface name (wlan1 in this case), -c the file where I’ve saved connection name and password, -D is the driver I’m using (try wpa_supplicant for a complete list).

Last step: ‘sudo dhclient wlan1’ for obtaining an ip address.

9

Read this:

10

This topic was automatically closed 15 days after the last reply. New replies are no longer allowed.