我无法将笔记本电脑连接到家庭 Wi-Fi有时但确实如此总是连接到我手机的接入点（连接到无法使用的 wifi）。我试过这但什么也没有。
iwconfig：
lo no wireless extensions.
enp2s0 no wireless extensions.
wlo1 IEEE 802.11 ESSID:"..."
Mode:Managed Frequency:2.437 GHz Access Point: 4A:FF:2A:8E:2B:CC
Bit Rate=130 Mb/s Tx-Power=3 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-38 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:2 Missed beacon:0
sudo lshw -c network：
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 15
serial: e4:a8:df:b6:3d:14
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.18.0-9.1-liquorix-amd64 firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=twisted pair
resources: irq:49 ioport:2000(size=256) memory:d1604000-d1604fff memory:d1600000-d1603fff
*-network
description: Wireless interface
product: MT7921 802.11ax PCI Express Wireless Network Adapter
vendor: MEDIATEK Corp.
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlo1
version: 00
serial: 38:d5:7a:66:1f:cf
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=mt7921e driverversion=5.18.0-9.1-liquorix-amd64 firmware=____010000-20220209150915 ip=192.168.234.219 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: iomemory:fc0-fbf iomemory:fc0-fbf iomemory:fc0-fbf irq:71 memory:fc02000000-fc020fffff memory:fc02100000-fc02103fff memory:fc02104000-fc02104fff
sudo journalctl -b 0 -u NetworkManager这些是我尝试连接家里的 wifi 时出现的日志行（来自使用）
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3332] device (wlo1): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3333] device (wlo1): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3334] device (wlo1): Activation: (wifi) connection 'netplan-wlo1-Wifi-Familia-Dumitru' has security, and secrets exist. No new
secrets needed.
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3335] Config: added 'ssid' value 'Wifi-Familia-Dumitru'
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3335] Config: added 'scan_ssid' value '1'
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3335] Config: added 'bgscan' value 'simple:30:-70:86400'
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3335] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256 FT-PSK SAE FT-SAE'
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3335] Config: added 'psk' value '<hidden>'
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3635] device (wlo1): supplicant interface state: disconnected -> authenticating
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.3925] device (wlo1): supplicant interface state: authenticating -> associating
jul 09 10:27:44 Valentin-LAPTOP NetworkManager[792]: <info> [1657355264.4333] device (wlo1): supplicant interface state: associating -> associated
jul 09 10:27:54 Valentin-LAPTOP NetworkManager[792]: <info> [1657355274.4631] device (wlo1): supplicant interface state: associated -> disconnected
jul 09 10:27:54 Valentin-LAPTOP NetworkManager[792]: <info> [1657355274.5777] device (wlo1): supplicant interface state: disconnected -> scanning
jul 09 10:27:58 Valentin-LAPTOP NetworkManager[792]: <info> [1657355278.3423] device (wlo1): supplicant interface state: scanning -> authenticating
jul 09 10:27:58 Valentin-LAPTOP NetworkManager[792]: <info> [1657355278.3516] device (wlo1): supplicant interface state: authenticating -> associating
jul 09 10:27:58 Valentin-LAPTOP NetworkManager[792]: <info> [1657355278.3999] device (wlo1): supplicant interface state: associating -> 4way_handshake
jul 09 10:28:01 Valentin-LAPTOP NetworkManager[792]: <info> [1657355281.2535] device (wlo1): disconnecting for new activation request.
答案1
5.17 内核上的 MT7921 驱动程序存在错误。部分已在 5.18 中修复，但即使是最新的 Ubuntu 仍使用 5.17