network stop work after limit tx power

English Network/Internet
1 
admin@localhost:~> sudo journalctl -b | grep wlan | grep Limiting -B5
Nov 29 11:21:24 localhost.localdomain NetworkManager[1656]: <info>  [1638156084.9589] device (wlan0): supplicant interfac
e state: 4-way handshake -> completed
Nov 29 11:21:24 localhost.localdomain NetworkManager[1656]: <info>  [1638156084.9589] device (wlan0): Activation: (wifi) 
Stage 2 of 5 (Device Configure) successful. Connected to wireless network "Lkme-tc"
Nov 29 11:21:24 localhost.localdomain NetworkManager[1656]: <info>  [1638156084.9589] device (p2p-dev-wlan0): supplicant 
management interface state: 4-way handshake -> completed
Nov 29 11:21:24 localhost.localdomain NetworkManager[1656]: <info>  [1638156084.9750] device (wlan0): state change: confi
g -> ip-config (reason 'none', sys-iface-state: 'managed')
Nov 29 11:21:24 localhost.localdomain NetworkManager[1656]: <info>  [1638156084.9757] dhcp4 (wlan0): activation: beginnin
g transaction (timeout in 45 seconds)
Nov 29 11:21:25 localhost.localdomain kernel: wlan0: **Limiting** TX power to 20 (23 - 3) dBm as advertised by 10:c1:72:a3:80
:d3
--
Nov 29 11:21:25 localhost.localdomain NetworkManager[1656]: <info>  [1638156085.1408] device (wlan0): state change: ip-ch
eck -> secondaries (reason 'none', sys-iface-state: 'managed')
Nov 29 11:21:25 localhost.localdomain NetworkManager[1656]: <info>  [1638156085.1414] device (wlan0): state change: secon
daries -> activated (reason 'none', sys-iface-state: 'managed')
Nov 29 11:21:25 localhost.localdomain NetworkManager[1656]: <info>  [1638156085.1476] policy: set 'Lkme-tc' (wlan0) as de
fault for IPv4 routing and DNS
Nov 29 11:21:25 localhost.localdomain NetworkManager[1656]: <info>  [1638156085.3566] device (wlan0): Activation: success
ful, device activated.
Nov 29 13:59:40 localhost.localdomain kernel: wlan0: AP 10:c1:72:a3:80:d3 changed bandwidth, new config is 5785.000 MHz, 
width 2 (5795.000/0 MHz)
Nov 29 13:59:40 localhost.localdomain kernel: wlan0: **Limiting** TX power to 30 (33 - 3) dBm as advertised by 10:c1:72:a3:80
:d3
--
Nov 29 14:01:38 localhost.localdomain avahi-daemon[1025]: New relevant interface wlan0.IPv4 for mDNS.
Nov 29 14:01:38 localhost.localdomain avahi-daemon[1025]: Registering new address record for 10.10.12.29 on wlan0.IPv4.
Nov 29 14:01:38 localhost.localdomain NetworkManager[1656]: <info>  [1638165698.5503] device (wlan0): state change: ip-ch
eck -> secondaries (reason 'none', sys-iface-state: 'managed')
Nov 29 14:01:38 localhost.localdomain NetworkManager[1656]: <info>  [1638165698.5505] device (wlan0): state change: secon
daries -> activated (reason 'none', sys-iface-state: 'managed')
Nov 29 14:01:38 localhost.localdomain NetworkManager[1656]: <info>  [1638165698.5532] policy: set 'LinkedME' (wlan0) as d
efault for IPv4 routing and DNS
Nov 29 14:01:38 localhost.localdomain kernel: wlan0: **Limiting** TX power to 20 (23 - 3) dBm as advertised by c4:ff:1f:52:59
:50


Hardware Class: network
  Model: "Intel Dual Band Wireless-AC 3168NGW [Stone Peak]"
  Vendor: pci 0x8086 "Intel Corporation"
  Device: pci 0x24fb "Dual Band Wireless-AC 3168NGW [Stone Peak]"

is there anyway to solve it permanently？after “Limiting TX power” , i can’t connect anything.

2

Does that mean that before this message you can connect things?

Is this system acting as Access Point (AP) or is it try to connect to an AP?

3

Please take a look at the output of the WLAN/WiFi tools – “iwlist txpower” and “iwconfig”.
The reason why the Ty power is being reduced may be caused either with “rfkill” or, “iwconfig txpower «value»” – normally “iwconfig txpower auto” should be used.

4

yes, i can connect things before that message.
my computer just try to connect to an AP,not acting as Access Point.

5 
admin@localhost:~> sudo iwlist txpower
lo        no transmit-power information.

eth0      no transmit-power information.

wlan0     unknown transmit-power information.

xdroid0   no transmit-power information.

admin@localhost:~> sudo iwlist wlan0 txpower  
wlan0     unknown transmit-power information.

          Current Tx-Power=20 dBm       (100 mW)


admin@localhost:~> sudo iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11  ESSID:"Lkme-tc"   
          Mode:Managed  Frequency:5.3 GHz  Access Point: 10:C1:72:A3:95:73    
          Bit Rate=180 Mb/s   Tx-Power=20 dBm    
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=47/70  Signal level=-63 dBm   
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:45   Missed beacon:0

xdroid0   no wireless extensions.

admin@localhost:~>
6

@herokillerj:

It seems that, the 5 GHz WLAN has some issues –

  • Tx – “Invalid misc:45”
  • wlan0 – “unknown transmit-power information.”
  • Encryption key:off

Does the 5 GHz WLAN use encryption?

  • Does the access point expect WPA (2 or 3) encryption?

Do you have access to a 2,4 GHz WLAN?

  • If there is one available, can you connect to it?
    *=2]With encryption if needed …

Do “iwlist auth” and “iwlist wpakeys” indicate anything?

7

  1. Does the 5 GHz WLAN use encryption?
    – yes, i choose the personal wpa/wpa2 and use kde wallet to save the password

  2. Do you have access to a 2,4 GHz WLAN?
    – yes,i can connect to 2,4 GHz WLAN,same encryption with 5G

  3. Do “iwlist auth” and “iwlist wpakeys” indicate anything?

admin@localhost:~> sudo iwlist auth
lo        no authentication information.

wlan0     Authentication capabilities :
                WPA
                WPA2
                CIPHER-TKIP
                CIPHER-CCMP


eth0      no authentication information.

xdroid0   no authentication information.


admin@localhost:~> sudo iwlist wpakeys
lo        no wpa key information.

wlan0     2 key sizes : 40, 104bits
          4 keys available :
Error reading wpa keys (SIOCGIWENCODEEXT): Operation not supported


eth0      no wpa key information.

xdroid0   no wpa key information.
8

The WiFi/WLAN hardware seems to have an issue here –

Error reading wpa keys (SIOCGIWENCODEEXT): Operation not supported

Which begs the question –

  • Do you have the “wpa_supplicant” package installed?
9

yes i do.

admin@localhost:~> sudo zypper se -i wpa_supplicant

S  | Name           | Summary                       | Type
---+----------------+-------------------------------+-------
i+ | wpa_supplicant | WPA supplicant implementation | 软件包