我最近从 21.04 升级到了 21.10，我的 wifi（以前运行正常）现在会随机掉线，直到我从菜单栏图标关闭/再次打开网络。
我最近能够观察到发生此事的确切时刻。
sudo journalctl -b 0 -u NetworkManager确定了以下事件：
Nov 01 23:23:44 ganymede NetworkManager[3858]: <info> [1635834224.1478] manager: NetworkManager state is now CONNECTED_SITE
同时，相关部分/var/log/syslog是：
Nov 1 23:23:44 ganymede NetworkManager[3858]: <info> [1635834224.1478] manager: NetworkManager state is now CONNECTED_SITE
Nov 1 23:23:44 ganymede dbus-daemon[3853]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.11' (uid=0 pid=3858 comm="/usr/sbin/NetworkManage
r --no-daemon " label="unconfined")
Nov 1 23:23:44 ganymede systemd[1]: Starting Network Manager Script Dispatcher Service...
Nov 1 23:23:44 ganymede dbus-daemon[3853]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Nov 1 23:23:44 ganymede systemd[1]: Started Network Manager Script Dispatcher Service.
Nov 1 23:23:54 ganymede systemd[1]: NetworkManager-dispatcher.service: Deactivated successfully.
最后，通过搜索dmesg -T | less找到了下面这段发生在该事件发生前的内容：
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: Microcode SW error detected. Restarting 0x0.
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: Start IWL Error Log Dump:
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: Status: 0x00000040, count: 6
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: Loaded firmware version: 63.c04f3485.0 cc-a0-63.ucode
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000071 | NMI_INTERRUPT_UMAC_FATAL
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000A200 | trm_hw_status0
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | trm_hw_status1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x004FAA7E | branchlink2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x004F163E | interruptlink1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x004F163E | interruptlink2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000AE8C | data1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00001000 | data2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | data3
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x9BC15FE3 | beacon time
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x1A5F92BA | tsf low
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000004E | tsf hi
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | time gp1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x1C1AFB9A | time gp2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000001 | uCode revision type
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000003F | uCode version major
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0xC04F3485 | uCode version minor
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000340 | hw version
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00C89000 | board version
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x80E0FC03 | hcmd
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x24020000 | isr0
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00400000 | isr1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x08F00002 | isr2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00C37FCC | isr3
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | isr4
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x05D9001C | last cmd Id
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000AE8C | wait_event
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x000000D4 | l2p_control
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00018034 | l2p_duration
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000007 | l2p_mhvalid
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000081 | l2p_addr_match
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000009 | lmpm_pmg_sel
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | timestamp
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x000048F0 | flow_handler
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: Start IWL Error Log Dump:
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: Status: 0x00000040, count: 7
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x20003463 | ADVANCED_SYSASSERT
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | umac branchlink1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x8045541A | umac branchlink2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0xC0084260 | umac interruptlink1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | umac interruptlink2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x1A5F92AE | umac data1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x1C1AFB8D | umac data2
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x5AF15252 | umac data3
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000003F | umac major
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0xC04F3485 | umac minor
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x1C1AFB95 | frame pointer
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0xC0885E0C | stack pointer
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0061010C | last host cmd
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000000 | isr status reg
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: IML/ROM dump:
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000003 | IML/ROM error/state
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00005977 | IML/ROM data1
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000080 | IML/ROM WFPM_AUTH_KEY_0
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: Fseq Registers:
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x60000000 | FSEQ_ERROR_CODE
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x80290021 | FSEQ_TOP_INIT_VERSION
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00050008 | FSEQ_CNVIO_INIT_VERSION
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000A503 | FSEQ_OTP_VERSION
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x80000003 | FSEQ_TOP_CONTENT_VERSION
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x4552414E | FSEQ_ALIVE_TOKEN
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00100530 | FSEQ_CNVI_ID
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000532 | FSEQ_CNVR_ID
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00100530 | CNVI_AUX_MISC_CHIP
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x00000532 | CNVR_AUX_MISC_CHIP
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x05B0905B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: 0x0000025B | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[Mon Nov 1 23:22:37 2021] iwlwifi 0000:04:00.0: WRT: Collecting data: ini trigger 4 fired (delay=0ms).
[Mon Nov 1 23:22:37 2021] ieee80211 phy0: Hardware restart was requested
[Mon Nov 1 23:22:38 2021] iwlwifi 0000:04:00.0: Got NSS = 4 - trimming to 2
[Mon Nov 1 23:22:38 2021] iwlwifi 0000:04:00.0: Got NSS = 4 - trimming to 2
有人有主意吗？
PS-差点忘了我的sudo lshw -class network
*-network
description: Wireless interface
product: Wi-Fi 6 AX200
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlp4s0
version: 1a
serial: dc:41:a9:e2:13:64
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.13.0-20-generic firmware=63.c04f3485.0 cc-a0-63.ucode ip=192.168.4.62 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:133 memory:fc700000-fc703fff
*-network
description: Ethernet interface
product: I211 Gigabit Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:05:00.0
logical name: enp5s0
version: 03
serial: 18:c0:4d:82:07:21
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.13.0-20-generic firmware=0. 6-1 latency=0 link=no multicast=yes port=twisted pair
resources: irq:24 memory:fc600000-fc61ffff ioport:f000(size=32) memory:fc620000-fc623fff
[编辑 #1] - 不管怎样，我现在捕获了另一个这样的事件，在 dmesg 中出现了看似相同的“检测到微码 SW 错误。重新启动 0x0。”，然后在 journalctl 中出现了状态更改“NetworkManager 状态现在为 CONNECTED_SITE”，所以这似乎是因果链。