Ubuntu 20.04에서 Wi-Fi 연결이 자주 끊어집니다.

가끔 Wi-Fi 연결이 반복적으로 끊어지는 경우가 있습니다. 때로는 몇 시간 또는 30분 후에 연결이 끊어지는 경우가 있는데 이유를 찾을 수 없습니다. 때로는 실행 중에 sudo docker exec -it 96414b09135d bash몇 분 후에 연결이 끊어지는 경우도 있습니다.

설정하려고 하는데 sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

wifi.powersave = 2

그리고 시도했다

1. sudo ifconfig wlp2s0 다운
2. sudo iwconfig wlan0 전원 끄기
3. sudo ifconfig wlp2s0 위로
4. sudo 서비스 네트워크 관리자 다시 시작

그리고 시도했다

systemctl list-unit-files --state enabled

keyboard-setup.service                     enabled enabled      
ModemManager.service                       enabled enabled      
network-manager.service                    enabled enabled      
networkd-dispatcher.service                enabled enabled

또한 시도했고,

sudo wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant/wpa_supplicant.conf

Successfully initialized wpa_supplicant
Failed to open config file '/etc/wpa_supplicant/wpa_supplicant.conf', error: No such file or directory
Failed to read or parse configuration '/etc/wpa_supplicant/wpa_supplicant.conf'.

또한 시도sudo nano /etc/NeworkManager/NetworkManger.conf

    [device]
wifi.scan-rand-mac-address=no

시험을 마친:

1. sudo 서비스 블루투스 다시 시작
2. sudo modprobe wl sudo lshw -C 네트워크
3. sudo apt 설치 네트워크 관리자
4. 클론https://github.com/mehedihshakeel/BroadcomInstaller2017.git 클론 https://github.com/prasathlk/BroadcomInstaller2019.gitCD BroadcomInstaller2019/./Broadcom.sh

여기/etc/pm/sleep.d$ ls

10_grub-common  10_unattended-upgrades-hibernate  config

여기echo "options QCA9377 fwlps=N" | sudo tee /etc/modprobe.d/QCA9377.conf

options QCA9377 fwlps=N

여기서 sudo nano /etc/dhcp/dhclient.conf #timeout 300;

여기dpkg -S $(which NetworkManager)

network-manager: /usr/sbin/NetworkManager

이 내 꺼야apt policy network-manager

network-manager:
  Installed: 1.22.10-1ubuntu2.2
  Candidate: 1.22.10-1ubuntu2.2
  Version table:
 *** 1.22.10-1ubuntu2.2 500
        500 http://in.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.22.10-1ubuntu1 500
        500 http://in.archive.ubuntu.com/ubuntu focal/main amd64 Packages

다음은 내 것입니다sudo journalctl -fu NetworkManager

<info>  [1637549618.0666] dhcp6 (wlp2s0): state changed unknown -> bound
<warn>  [1637549996.3364] sup-iface[0x55dc05fec3d0,wlp2s0]: connection disconnected (reason -3)
<info>  [1637549996.4370] manager: rfkill: Wi-Fi now disabled by radio killswitch
<info>  [1637549996.4374] device (wlp2s0): state change: activated -> unavailable (reason 'none', sys-iface-state: 'managed')
<info>  [1637549996.4665] dhcp4 (wlp2s0): canceled DHCP transaction
<info>  [1637549996.4666] dhcp4 (wlp2s0): state changed bound -> done
<info>  [1637549996.4672] dhcp6 (wlp2s0): canceled DHCP transaction
<info>  [1637549996.4672] dhcp6 (wlp2s0): state changed bound -> done
---------------------
<warn>  [1637553729.6989] sup-iface[0x55dc05fec1f0,wlp2s0]: connection disconnected (reason -3)
<info>  [1637553729.6992] device (wlp2s0): supplicant interface state: completed -> disconnected
<info>  [1637553729.6992] device (p2p-dev-wlp2s0): supplicant management interface state: completed -> disconnected
<info>  [1637553729.7093] device (wlp2s0): state change: deactivating -> disconnected (reason 'new-activation', sys-iface-state: 'managed')
<info>  [1637553729.7305] dhcp4 (wlp2s0): canceled DHCP transaction
<info>  [1637553729.7306] dhcp4 (wlp2s0): state changed bound -> done
<info>  [1637553729.7314] dhcp6 (wlp2s0): canceled DHCP transaction
<info>  [1637553729.7314] dhcp6 (wlp2s0): state changed bound -> done
---------------------
<warn>  [1637553946.7590] sup-iface[0x55dc05fec1f0,wlp2s0]: connection disconnected (reason -4)
<info>  [1637553946.7982] device (wlp2s0): supplicant interface state: completed -> disconnected
<info>  [1637553946.7982] device (p2p-dev-wlp2s0): supplicant management interface state: completed -> disconnected
<info>  [1637553950.8662] device (wlp2s0): supplicant interface state: disconnected -> scanning
<info>  [1637553950.8662] device (p2p-dev-wlp2s0): supplicant management interface state: disconnected -> scanning
<warn>  [1637553962.0505] device (wlp2s0): link timed out.
<info>  [1637553962.0529] device (wlp2s0): state change: activated -> failed (reason 'ssid-not-found', sys-iface-state: 'managed')
<warn>  [1637553962.0610] device (wlp2s0): Activation: failed for connection 'WIFINAME'
<info>  [1637553962.0650] device (wlp2s0): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
<info>  [1637553962.0985] dhcp4 (wlp2s0): canceled DHCP transaction
<info>  [1637553962.0986] dhcp4 (wlp2s0): state changed bound -> done
<info>  [1637553962.1123] manager: NetworkManager state is now CONNECTED_LOCAL
<info>  [1637553980.3890] manager: rfkill: Wi-Fi hardware radio set disabled
<info>  [1637553980.3891] device (wlp2s0): state change: disconnected -> unavailable (reason 'none', sys-iface-state: 'managed')
<info>  [1637553980.3930] audit: op="radio-control" arg="wireless-enabled" pid=1512 uid=1000 result="success"
<info>  [1637553980.3934] device (p2p-dev-wlp2s0): state change: disconnected -> unavailable (reason 'supplicant-failed', sys-iface-state: 'managed')
<info>  [1637553980.3962] manager: rfkill: Wi-Fi now disabled by radio killswitch
<info>  [1637553984.3856] manager: rfkill: Wi-Fi hardware radio set enabled
<info>  [1637553984.6532] audit: op="radio-control" arg="wireless-enabled" pid=1512 uid=1000 result="success"
<info>  [1637553984.6538] manager: rfkill: Wi-Fi now enabled by radio killswitch
<info>  [1637553984.8032] sup-iface[0x55dc05fec100,wlp2s0]: supports 5 scan SSIDs
<info>  [1637553984.8048] device (wlp2s0): supplicant interface state: starting -> ready
<info>  [1637553984.8049] device (p2p-dev-wlp2s0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
<info>  [1637553984.8055] device (wlp2s0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')