Thank David! below is your requested output by ubuntu and debianbut link/level in debian is above 50, it's ok, i'm afraid it offer little clue to my problem output by ubuntu:zhou@zhou-Lenovo:~$ iw dev wlx502b73d50a69 info Interface wlx502b73d50a69 ifindex 2 wdev 0x1 addr 50:2b:73:d5:0a:69 ssid JHotel type managed wiphy 0 channel 11 (2462 MHz), width: 20 MHz, center1: 2462 MHz zhou@zhou-Lenovo:~$ iw dev wlx502b73d50a69 link Connected to 06:74:9c:9b:f9:99 (on wlx502b73d50a69) SSID: JHotel freq: 2462 RX: 211078 bytes (2150 packets) TX: 19433 bytes (199 packets) signal: -41 dBm tx bitrate: 58.5 MBit/s MCS 6
bss flags: short-preamble short-slot-time dtim period: 1 beacon int: 100 zhou@zhou-Lenovo:~$ iw dev wlx502b73d50a69 station dump Station 06:74:9c:9b:f9:99 (on wlx502b73d50a69) inactive time: 5404 ms rx bytes: 243537 rx packets: 2486 tx bytes: 21049 tx packets: 225 tx retries: 50 tx failed: 0 signal: -41 [-41] dBm signal avg: -42 [-42] dBm tx bitrate: 65.0 MBit/s MCS 7 rx bitrate: 11.0 MBit/s expected throughput: 31.218Mbps authorized: yes authenticated: yes preamble: long WMM/WME: yes MFP: no TDLS peer: no zhou@zhou-Lenovo:~$ output by debian:root@debian:~# iw dev wlx502b73d50a69 info Interface wlx502b73d50a69 ifindex 2 wdev 0x1 addr 50:2b:73:d5:0a:69 ssid JHotel type managed wiphy 0 channel 1 (2412 MHz), width: 20 MHz, center1: 2412 MHz txpower 20.00 dBm root@debian:~# iw dev wlx502b73d50a69 link Connected to 06:74:9c:6e:ca:6a (on wlx502b73d50a69) SSID: JHotel freq: 2412 RX: 8705059 bytes (16115 packets) TX: 1882637 bytes (7086 packets) signal: -53 dBm rx bitrate: 72.2 MBit/s MCS 7 short GI tx bitrate: 43.3 MBit/s MCS 4 short GI bss flags: short-preamble short-slot-time dtim period: 1 beacon int: 100 root@debian:~# iw dev wlx502b73d50a69 station dump Station 06:74:9c:6e:ca:6a (on wlx502b73d50a69) inactive time: 2440 ms rx bytes: 8724627 rx packets: 16318 tx bytes: 1883412 tx packets: 7089 tx retries: 6356 tx failed: 160 beacon loss: 46 beacon rx: 4071 rx drop misc: 288 signal: -51 [-51] dBm signal avg: -52 [-52] dBm beacon signal avg: -52 dBm tx bitrate: 72.2 MBit/s MCS 7 short GI rx bitrate: 72.2 MBit/s MCS 7 short GI expected throughput: 26.367Mbps authorized: yes authenticated: yes associated: yes preamble: long WMM/WME: yes MFP: no TDLS peer: no DTIM period: 1 beacon interval:100 short preamble: yes short slot time:yes connected time: 623 seconds
