我有一个戴尔酷睿 i5笔记本电脑Ubuntu 18.04.6 LTS。
我用这台笔记本电脑已经两年了，WiFi 连接没有问题，但从前两天开始，它开始出现 WiFi 连接问题。使用 FireFox 时，网络连接会随机断开。我不得不重新启动“网络管理器”才能恢复连接，如下所示：
sudo 服务网络管理器重新启动
然后它可以正常工作 5 分钟、20 分钟或 30 分钟，然后再次失去连接。我的 WiFi 路由器与其他设备配合使用时很好。
我在网上看到过类似的关于 Ubuntu 连接问题的帖子，我试了所有办法，但都没有成功。我尝试在网络管理器中禁用 IPv6，但问题并没有解决。
当连接断开时，我无法 ping 以下或访问网页：
ping雅虎
品脱 8.8.8.8
我将非常感激任何帮助，
感谢您的时间
。nraza
以下是我的机器的一些信息：
Ubuntu 18.04.6 LTS
Intel® Core™ i5-8365U CPU @ 1.60GHz × 8
网络控制器：Qualcomm Atheros QCA6174 802.11ac 无线网络适配器（rev 32）
型号名称：Intel(R) Core(TM) i5-8365U CPU @ 1.60GHz
>> lshw -C network
*-network
description: Wireless interface
product: QCA6174 802.11ac Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 32
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=5.4.0-110-generic firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip=192.168.86.245 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:129 memory:91000000-911fffff
*-network
description: Ethernet interface
product: Ethernet Connection (6) I219-LM
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: eno1
version: 30
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.4-4 latency=0 link=no multicast=yes port=twisted pair
resources: irq:131 memory:91400000-9141ffff
@waltinator 这是其输出：“sudo journalctl -b 0 -u 网络管理器“ 命令：
-- Logs begin at Fri 2020-12-11 09:05:07 EST, end at Thu 2022-05-19 22:08:21 EDT. --
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2672] interface-parser: finished parsing file /etc/network/interfaces
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2673] management mode: unmanaged
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2681] devices added (path: /sys/devices/pci0000:00/0000:00:1d.0/0000:02:00.0/net/wlp2s0, iface: wlp2s0)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2681] device added (path: /sys/devices/pci0000:00/0000:00:1d.0/0000:02:00.0/net/wlp2s0, iface: wlp2s0): no ifupdown configuration found.
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2682] devices added (path: /sys/devices/pci0000:00/0000:00:1f.6/net/eno1, iface: eno1)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2682] device added (path: /sys/devices/pci0000:00/0000:00:1f.6/net/eno1, iface: eno1): no ifupdown configuration found.
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2682] devices added (path: /sys/devices/virtual/net/lo, iface: lo)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2682] device added (path: /sys/devices/virtual/net/lo, iface: lo): no ifupdown configuration found.
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2683] end _init.
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2683] settings: loaded plugin ifupdown: (C) 2008 Canonical Ltd. To report bugs please use the NetworkManager mailing list. (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-settings-plugin-ifupdown.so)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2683] settings: loaded plugin keyfile: (c) 2007 - 2016 Red Hat, Inc. To report bugs please use the NetworkManager mailing list.
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2684] (-986639616) ... get_connections.
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2684] (-986639616) ... get_connections (managed=false): return empty list.
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2853] keyfile: new connection /etc/NetworkManager/system-connections/wifibox (b7f8523d-1939-407a-90d9-4f95b71b7546,"wifibox")
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.2957] keyfile: new connection /etc/NetworkManager/system-connections/Jazz-LTE-D120 (ec6479c7-da15-4890-b00e-428f321020b7,"Jazz-LTE-D120")
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3035] keyfile: new connection /etc/NetworkManager/system-connections/HUAWEI-aGsR (3d849a2e-3b1b-4aed-b160-1cf8ddd2f43d,"HUAWEI-aGsR")
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3040] get unmanaged devices count: 0
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3040] manager: rfkill: WiFi enabled by radio killswitch; enabled by state file
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3040] manager: rfkill: WWAN enabled by radio killswitch; enabled by state file
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3040] manager: Networking is enabled by state file
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3041] dhcp-init: Using DHCP client 'dhclient'
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3042] Loaded device plugin: NMBondDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3042] Loaded device plugin: NMBridgeDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3042] Loaded device plugin: NMDummyDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3042] Loaded device plugin: NMEthernetDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3042] Loaded device plugin: NMInfinibandDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3042] Loaded device plugin: NMIPTunnelDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3043] Loaded device plugin: NMMacsecDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3043] Loaded device plugin: NMMacvlanDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3043] Loaded device plugin: NMPppDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3043] Loaded device plugin: NMTunDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3043] Loaded device plugin: NMVethDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3043] Loaded device plugin: NMVlanDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3043] Loaded device plugin: NMVxlanDeviceFactory (internal)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3050] Loaded device plugin: NMTeamFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-team.so)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3054] Loaded device plugin: NMWwanFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wwan.so)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3056] Loaded device plugin: NMAtmManager (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-adsl.so)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3057] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wifi.so)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3060] Loaded device plugin: NMBluezManager (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-bluetooth.so)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3066] device (lo): carrier: link connected
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3070] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/1)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3078] manager: (eno1): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3086] keyfile: add connection in-memory (26b62a52-9036-38ab-a185-eb9b8c5c25fa,"Wired connection 1")
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3088] settings: (eno1): created default wired connection 'Wired connection 1'
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3095] device (eno1): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3101] wifi-nl80211: (wlp2s0): using nl80211 for WiFi device control
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3102] device (wlp2s0): driver supports Access Point (AP) mode
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3107] manager: (wlp2s0): new 802.11 WiFi device (/org/freedesktop/NetworkManager/Devices/3)
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.3113] device (wlp2s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.6050] bluez: use BlueZ version 5
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.6058] modem-manager: ModemManager available
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.6128] supplicant: wpa_supplicant running
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.6128] device (wlp2s0): supplicant interface state: init -> starting
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.6164] bluez5: NAP: added interface 8C:C8:4B:3B:E8:34
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.7371] sup-iface[0x563fc52a9a40,wlp2s0]: supports 5 scan SSIDs
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.7384] device (wlp2s0): supplicant interface state: starting -> ready
May 19 22:06:17 james NetworkManager[7854]: <info> [1653012377.7385] device (wlp2s0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6418] policy: auto-activating connection 'wifibox'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6428] device (wlp2s0): Activation: starting connection 'wifibox' (b7f8523d-1939-407a-90d9-4f95b71b7546)
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6429] device (wlp2s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6430] manager: NetworkManager state is now CONNECTING
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6434] device (wlp2s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6436] device (wlp2s0): Activation: (wifi) access point 'wifibox' has security, but secrets are required.
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6436] device (wlp2s0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6462] device (wlp2s0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6465] device (wlp2s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6467] device (wlp2s0): Activation: (wifi) connection 'wifibox' has security, and secrets exist. No new secrets needed.
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6468] Config: added 'ssid' value 'wifibox'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6468] Config: added 'scan_ssid' value '1'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6468] Config: added 'bgscan' value 'simple:30:-80:86400'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6468] Config: added 'key_mgmt' value 'WPA-PSK'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.6468] Config: added 'psk' value '<hidden>'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7189] device (wlp2s0): supplicant interface state: ready -> authenticating
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7362] device (wlp2s0): supplicant interface state: authenticating -> associating
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7551] device (wlp2s0): supplicant interface state: associating -> associated
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7648] device (wlp2s0): supplicant interface state: associated -> completed
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7649] device (wlp2s0): Activation: (wifi) Stage 2 of 5 (Device Configure) successful. Connected to wireless network 'wifibox'.
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7651] device (wlp2s0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7672] dhcp4 (wlp2s0): activation: beginning transaction (timeout in 45 seconds)
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.7716] dhcp4 (wlp2s0): dhclient started with pid 7879
May 19 22:06:22 james dhclient[7879]: DHCPREQUEST of 192.168.86.245 on wlp2s0 to 255.255.255.255 port 67 (xid=0xf01ffeb)
May 19 22:06:22 james dhclient[7879]: DHCPACK of 192.168.86.245 from 192.168.86.1
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8399] dhcp4 (wlp2s0): address 192.168.86.245
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8400] dhcp4 (wlp2s0): plen 24 (255.255.255.0)
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8400] dhcp4 (wlp2s0): gateway 192.168.86.1
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8401] dhcp4 (wlp2s0): lease time 86400
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8401] dhcp4 (wlp2s0): hostname 'james'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8401] dhcp4 (wlp2s0): nameserver '192.168.86.1'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8402] dhcp4 (wlp2s0): domain name 'lan'
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8402] dhcp4 (wlp2s0): state changed unknown -> bound
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8481] device (wlp2s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8501] device (wlp2s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8509] device (wlp2s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.8514] manager: NetworkManager state is now CONNECTED_LOCAL
May 19 22:06:22 james dhclient[7879]: bound to 192.168.86.245 -- renewal in 38480 seconds.
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.9144] manager: NetworkManager state is now CONNECTED_SITE
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.9147] policy: set 'wifibox' (wlp2s0) as default for IPv4 routing and DNS
May 19 22:06:22 james NetworkManager[7854]: <info> [1653012382.9158] device (wlp2s0): Activation: successful, device activated.
May 19 22:06:23 james NetworkManager[7854]: <info> [1653012383.3109] manager: startup complete
May 19 22:06:31 james NetworkManager[7854]: <info> [1653012391.2122] manager: NetworkManager state is now CONNECTED_GLOBAL