之前apt upgrade，uname -a => 6.2.0-39-generic。实际结果 - wifi 稳定
之后 apt upgrade，uname -a => 6.5.0-14-generic。实际结果 - wifi 不断掉线
其他详情：
Ubuntu 22.04.3 LTS
-network
description: Wireless interface
product: MT7921 802.11ax PCI Express Wireless Network Adapter
vendor: MEDIATEK Corp.
physical id: 0
bus info: pci@0000:02:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=mt7921e driverversion=6.2.0-39-generic firmware=____010000-20220209150915 latency=0 link=yes multicast=yes wireless=IEEE 802.11
sudo journalctl -b 0 -u NetworkManager
---
Jan 17 06:51:49 systemd[1]: Starting Network Manager...
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.6412] NetworkManager (version 1.36.6) is starting... (for the first time)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.6435] Read config: /etc/NetworkManager/NetworkManager.conf (lib: 10-dns-resolved.conf, 20-connectivity-ubuntu.conf, no-mac-addr-change.co>
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.6845] bus-manager: acquired D-Bus service "org.freedesktop.NetworkManager"
Jan 17 06:51:49 systemd[1]: Started Network Manager.
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.7109] manager[0x558933c32000]: monitoring kernel firmware directory '/lib/firmware'.
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.7114] monitoring ifupdown state file '/run/network/ifstate'.
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8656] hostname: hostname: using hostnamed
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8656] hostname: static hostname changed from (none) to "<censored>"
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8702] dns-mgr[0x558933c0c2a0]: init: dns=systemd-resolved rc-manager=unmanaged (auto), plugin=systemd-resolved
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8731] rfkill3: found Wi-Fi radio killswitch (at /sys/devices/pci0000:00/0000:00:1d.1/0000:02:00.0/ieee80211/phy0/rfkill3) (driver mt7921e)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8732] rfkill0: found Wi-Fi radio killswitch (at /sys/devices/platform/acer-wmi/rfkill/rfkill0) (platform driver acer-wmi)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8794] manager[0x558933c32000]: rfkill: Wi-Fi hardware radio set enabled
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8795] manager[0x558933c32000]: rfkill: WWAN hardware radio set enabled
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.8900] Loaded device plugin: NMAtmManager (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-adsl.so)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9022] Loaded device plugin: NMTeamFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-team.so)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9150] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-wifi.so)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9364] Loaded device plugin: NMBluezManager (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-bluetooth.so)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9396] Loaded device plugin: NMWwanFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-device-plugin-wwan.so)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9400] manager: rfkill: Wi-Fi enabled by radio killswitch; enabled by state file
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9401] manager: rfkill: WWAN enabled by radio killswitch; enabled by state file
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9401] manager: Networking is enabled by state file
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9574] settings: Loaded settings plugin: ifupdown ("/usr/lib/x86_64-linux-gnu/NetworkManager/1.36.6/libnm-settings-plugin-ifupdown.so")
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9576] settings: Loaded settings plugin: keyfile (internal)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9585] ifupdown: management mode: unmanaged
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9596] ifupdown: interfaces file /etc/network/interfaces doesn't exist
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9735] dhcp-init: Using DHCP client 'internal'
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9736] device (lo): carrier: link connected
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9738] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/1)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9752] manager: (enp1s0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2)
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9762] settings: (enp1s0): created default wired connection 'Wired connection 1'
Jan 17 06:51:49 NetworkManager[608]: <info> [1705492309.9763] device (enp1s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.2353] device (wlp2s0): driver supports Access Point (AP) mode
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.2357] manager: (wlp2s0): new 802.11 Wi-Fi device (/org/freedesktop/NetworkManager/Devices/3)
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.2358] device (wlp2s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9051] failed to open /run/network/ifstate
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9149] modem-manager: ModemManager available
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9484] manager: (virbr0): new Bridge device (/org/freedesktop/NetworkManager/Devices/4)
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9615] device (wlp2s0): supplicant interface state: internal-starting -> disconnected
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9616] Wi-Fi P2P device controlled by interface wlp2s0 created
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9617] manager: (p2p-dev-wlp2s0): new 802.11 Wi-Fi P2P device (/org/freedesktop/NetworkManager/Devices/5)
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9619] device (p2p-dev-wlp2s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9621] device (wlp2s0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Jan 17 06:51:50 NetworkManager[608]: <info> [1705492310.9625] device (p2p-dev-wlp2s0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2139] device (virbr0): state change: unmanaged -> unavailable (reason 'connection-assumed', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2143] device (virbr0): state change: unavailable -> disconnected (reason 'connection-assumed', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2150] device (virbr0): Activation: starting connection 'virbr0' (40317e6e-7c5a-46a8-81ea-320c6cf1cdce)
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2166] device (virbr0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2171] device (virbr0): state change: prepare -> config (reason 'none', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2175] device (virbr0): state change: config -> ip-config (reason 'none', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2188] device (virbr0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2228] device (virbr0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2230] device (virbr0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'external')
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2232] manager: NetworkManager state is now CONNECTED_LOCAL
Jan 17 06:51:51 NetworkManager[608]: <info> [1705492311.2234] device (virbr0): Activation: successful, device activated.
Jan 17 06:51:52 NetworkManager[608]: <info> [1705492312.2867] agent-manager: agent[86e4784af252d22c,:1.33/org.gnome.Shell.NetworkAgent/125]: agent registered
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8445] policy: auto-activating connection '<censored>' (ea92f47b-5b1c-477b-b438-c76290c37e6e)
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8451] device (wlp2s0): Activation: starting connection '<censored>' (ea92f47b-5b1c-477b-b438-c76290c37e6e)
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8453] device (wlp2s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8454] manager: NetworkManager state is now CONNECTING
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8455] device (wlp2s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8457] device (wlp2s0): Activation: (wifi) access point '<censored>' has security, but secrets are required.
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8458] device (wlp2s0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8464] device (wlp2s0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8465] device (wlp2s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8467] device (wlp2s0): Activation: (wifi) connection '<censored>' has security, and secrets exist. No new secrets needed.
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8467] Config: added 'ssid' value '<censored>'
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8467] Config: added 'scan_ssid' value '1'
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8467] Config: added 'bgscan' value 'simple:30:-70:86400'
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8467] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256 FT-PSK SAE FT-SAE'
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8467] Config: added 'auth_alg' value 'OPEN'
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8468] Config: added 'psk' value '<hidden>'
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8738] device (wlp2s0): supplicant interface state: disconnected -> authenticating
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8738] device (p2p-dev-wlp2s0): supplicant management interface state: disconnected -> authenticating
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8768] device (wlp2s0): supplicant interface state: authenticating -> associating
Jan 17 06:51:57 NetworkManager[608]: <info> [1705492317.8768] device (p2p-dev-wlp2s0): supplicant management interface state: authenticating -> associating
Jan 17 06:51:58 NetworkManager[608]: <info> [1705492318.3936] device (wlp2s0): supplicant interface state: associating -> associated
Jan 17 06:51:58 NetworkManager[608]: <info> [1705492318.3936] device (p2p-dev-wlp2s0): supplicant management interface state: associating -> associated
Jan 17 06:51:58 NetworkManager[608]: <info> [1705492318.9105] device (wlp2s0): supplicant interface state: associated -> 4way_handshake
Jan 17 06:51:58 NetworkManager[608]: <info> [1705492318.9106] device (p2p-dev-wlp2s0): supplicant management interface state: associated -> 4way_handshake
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0122] device (wlp2s0): supplicant interface state: 4way_handshake -> completed
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0122] device (wlp2s0): Activation: (wifi) Stage 2 of 5 (Device Configure) successful. Connected to wireless network "<censored>"
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0123] device (p2p-dev-wlp2s0): supplicant management interface state: 4way_handshake -> completed
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0125] device (wlp2s0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0138] dhcp4 (wlp2s0): activation: beginning transaction (timeout in 45 seconds)
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0347] dhcp4 (wlp2s0): state changed new lease, address=192.168.50.112
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0415] device (wlp2s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0448] device (wlp2s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0451] device (wlp2s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0456] manager: NetworkManager state is now CONNECTED_LOCAL
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0465] manager: NetworkManager state is now CONNECTED_SITE
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0466] policy: set '<censored>' (wlp2s0) as default for IPv4 routing and DNS
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0475] device (wlp2s0): Activation: successful, device activated.
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.0484] manager: startup complete
Jan 17 06:51:59 NetworkManager[608]: <info> [1705492319.1566] manager: NetworkManager state is now CONNECTED_GLOBAL
Jan 17 06:52:04 NetworkManager[608]: <info> [1705492324.8115] agent-manager: agent[53c7b89dd7cc18e3,:1.86/org.gnome.Shell.NetworkAgent/1000]: agent registered
service NetworkManager status
---
NetworkManager.service - Network Manager
Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2024-01-17 06:51:49 EST; 17min ago
Docs: man:NetworkManager(8)
Main PID: 608 (NetworkManager)
Tasks: 3 (limit: 13982)
Memory: 11.6M
CPU: 369ms
CGroup: /system.slice/NetworkManager.service
└─608 /usr/sbin/NetworkManager --no-daemon
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0415] device (wlp2s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0448] device (wlp2s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0451] device (wlp2s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0456] manager: NetworkManager state is now CONNECTED_LOCAL
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0465] manager: NetworkManager state is now CONNECTED_SITE
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0466] policy: set '<censored>' (wlp2s0) as default for IPv4 routing and DNS
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0475] device (wlp2s0): Activation: successful, device activated.
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.0484] manager: startup complete
Jan 17 06:51:59 <censored>NetworkManager[608]: <info> [1705492319.1566] manager: NetworkManager state is now CONNECTED_GLOBAL
Jan 17 06:52:04 <censored>NetworkManager[608]: <info> [1705492324.8115] agent-manager: agent[53c7b89dd7cc18e3,:1.86/org.gnome.Shell.NetworkAgent/1000]: agent registered
service --status-all
---
[ + ] acpid
[ - ] alsa-utils
[ - ] anacron
[ + ] apparmor
[ + ] apport
[ + ] avahi-daemon
[ + ] bluetooth
[ - ] console-setup.sh
[ + ] cron
[ + ] cups
[ + ] cups-browsed
[ + ] dbus
[ + ] gdm3
[ - ] grub-common
[ - ] hwclock.sh
[ + ] irqbalance
[ + ] kerneloops
[ - ] keyboard-setup.sh
[ + ] kmod
[ - ] lvm2
[ - ] lvm2-lvmpolld
[ + ] openvpn
[ - ] plymouth
[ + ] plymouth-log
[ + ] procps
[ - ] pulseaudio-enable-autospawn
[ - ] rsync
[ - ] saned
[ + ] smartmontools
[ - ] speech-dispatcher
[ - ] spice-vdagent
[ - ] sysstat
[ + ] udev
[ + ] ufw
[ + ] unattended-upgrades
[ - ] uuidd
[ - ] whoopsie
[ - ] x11-common
答案1
我不确定我使用的内核版本，但在某些 WLAN 上使用相同的 MT7921 卡时，我很少能够连接，直到有人建议我从 22.04.3 LTS 升级到 23.10，这解决了所有问题。这是另一个问题，但如果您确实升级了，我注意到我的 23.10 系统在最近的内核更新后才变得非常缓慢，因此我暂时降级到 6.5.0-21-generic，这恢复了正常性能。
我在一些 WLAN 上使用同一张卡时遇到了问题，直到有人建议我从 22.04 升级到 23.10，所有问题都解决了。这是一个单独的问题，但我注意到我的 23.10 系统在最近的内核升级后才变得非常缓慢，所以我暂时将其修复为 Linux 6.5.0-21-generic，这个问题就解决了。