我有一台运行 Ubuntu 20.04.3 的 ThinkPad P14s，我曾经这个问题和这个答案曾经工作。
几天前，我的 WiFi 再次停止工作 - 大概是在升级之后。这次，上述解决方案不再能解决问题，内核消息也不同：
[ 68.475159] iwlwifi 0000:09:00.0: enabling device (0000 -> 0002)
[ 68.488513] iwlwifi 0000:09:00.0: api flags index 2 larger than supported by driver
[ 68.488533] iwlwifi 0000:09:00.0: TLV_FW_FSEQ_VERSION: FSEQ Version: 0.0.2.25
[ 68.489009] iwlwifi 0000:09:00.0: loaded firmware version 63.c04f3485.0 ty-a0-gf-a0-63.ucode op_mode iwlmvm
[ 68.623466] iwlwifi 0000:09:00.0: Detected Intel(R) Wi-Fi 6 AX210 160MHz, REV=0x420
[ 68.803885] iwlwifi 0000:09:00.0: Microcode SW error detected. Restarting 0x0.
[ 68.803996] iwlwifi 0000:09:00.0: Start IWL Error Log Dump:
[ 68.803999] iwlwifi 0000:09:00.0: Status: 0x00000040, count: 6
[ 68.804001] iwlwifi 0000:09:00.0: Loaded firmware version: 63.c04f3485.0 ty-a0-gf-a0-63.ucode
[ 68.804003] iwlwifi 0000:09:00.0: 0x00000071 | NMI_INTERRUPT_UMAC_FATAL
[ 68.804006] iwlwifi 0000:09:00.0: 0x002002F0 | trm_hw_status0
[ 68.804008] iwlwifi 0000:09:00.0: 0x00000000 | trm_hw_status1
[ 68.804009] iwlwifi 0000:09:00.0: 0x004DA004 | branchlink2
[ 68.804011] iwlwifi 0000:09:00.0: 0x004D07EA | interruptlink1
[ 68.804012] iwlwifi 0000:09:00.0: 0x004D07EA | interruptlink2
[ 68.804014] iwlwifi 0000:09:00.0: 0x004D8DEA | data1
[ 68.804016] iwlwifi 0000:09:00.0: 0x00000010 | data2
[ 68.804017] iwlwifi 0000:09:00.0: 0x00000000 | data3
[ 68.804019] iwlwifi 0000:09:00.0: 0x00000000 | beacon time
[ 68.804020] iwlwifi 0000:09:00.0: 0x00013757 | tsf low
[ 68.804022] iwlwifi 0000:09:00.0: 0x00000000 | tsf hi
[ 68.804023] iwlwifi 0000:09:00.0: 0x00000000 | time gp1
[ 68.804025] iwlwifi 0000:09:00.0: 0x0002859D | time gp2
[ 68.804027] iwlwifi 0000:09:00.0: 0x00000001 | uCode revision type
[ 68.804028] iwlwifi 0000:09:00.0: 0x0000003F | uCode version major
[ 68.804030] iwlwifi 0000:09:00.0: 0xC04F3485 | uCode version minor
[ 68.804032] iwlwifi 0000:09:00.0: 0x00000420 | hw version
[ 68.804033] iwlwifi 0000:09:00.0: 0x00489002 | board version
[ 68.804035] iwlwifi 0000:09:00.0: 0x8008FF00 | hcmd
[ 68.804036] iwlwifi 0000:09:00.0: 0x00020000 | isr0
[ 68.804038] iwlwifi 0000:09:00.0: 0x60000000 | isr1
[ 68.804040] iwlwifi 0000:09:00.0: 0x58F00002 | isr2
[ 68.804041] iwlwifi 0000:09:00.0: 0x00C0000C | isr3
[ 68.804043] iwlwifi 0000:09:00.0: 0x00000000 | isr4
[ 68.804045] iwlwifi 0000:09:00.0: 0x00000000 | last cmd Id
[ 68.804046] iwlwifi 0000:09:00.0: 0x004D8DEA | wait_event
[ 68.804048] iwlwifi 0000:09:00.0: 0x00000000 | l2p_control
[ 68.804050] iwlwifi 0000:09:00.0: 0x00000000 | l2p_duration
[ 68.804051] iwlwifi 0000:09:00.0: 0x00000000 | l2p_mhvalid
[ 68.804053] iwlwifi 0000:09:00.0: 0x00000000 | l2p_addr_match
[ 68.804054] iwlwifi 0000:09:00.0: 0x00000009 | lmpm_pmg_sel
[ 68.804056] iwlwifi 0000:09:00.0: 0x00000000 | timestamp
[ 68.804058] iwlwifi 0000:09:00.0: 0x00000024 | flow_handler
[ 68.804112] iwlwifi 0000:09:00.0: Start IWL Error Log Dump:
[ 68.804113] iwlwifi 0000:09:00.0: Status: 0x00000040, count: 7
[ 68.804115] iwlwifi 0000:09:00.0: 0x2010070D | ADVANCED_SYSASSERT
[ 68.804117] iwlwifi 0000:09:00.0: 0x00000000 | umac branchlink1
[ 68.804118] iwlwifi 0000:09:00.0: 0x8045CF40 | umac branchlink2
[ 68.804120] iwlwifi 0000:09:00.0: 0x0108E0B2 | umac interruptlink1
[ 68.804122] iwlwifi 0000:09:00.0: 0x00000000 | umac interruptlink2
[ 68.804124] iwlwifi 0000:09:00.0: 0x00000005 | umac data1
[ 68.804125] iwlwifi 0000:09:00.0: 0xDEADBEEF | umac data2
[ 68.804127] iwlwifi 0000:09:00.0: 0xDEADBEEF | umac data3
[ 68.804128] iwlwifi 0000:09:00.0: 0x0000003F | umac major
[ 68.804130] iwlwifi 0000:09:00.0: 0xC04F3485 | umac minor
[ 68.804132] iwlwifi 0000:09:00.0: 0x00028596 | frame pointer
[ 68.804133] iwlwifi 0000:09:00.0: 0xC0885E90 | stack pointer
[ 68.804135] iwlwifi 0000:09:00.0: 0x00010C00 | last host cmd
[ 68.804137] iwlwifi 0000:09:00.0: 0x00000000 | isr status reg
[ 68.804165] iwlwifi 0000:09:00.0: IML/ROM dump:
[ 68.804166] iwlwifi 0000:09:00.0: 0x00000B03 | IML/ROM error/state
[ 68.804185] iwlwifi 0000:09:00.0: 0x000086A0 | IML/ROM data1
[ 68.804197] iwlwifi 0000:09:00.0: 0x00000080 | IML/ROM WFPM_AUTH_KEY_0
[ 68.804204] iwlwifi 0000:09:00.0: Fseq Registers:
[ 68.804216] iwlwifi 0000:09:00.0: 0x20000000 | FSEQ_ERROR_CODE
[ 68.804228] iwlwifi 0000:09:00.0: 0x80440002 | FSEQ_TOP_INIT_VERSION
[ 68.804240] iwlwifi 0000:09:00.0: 0x00080009 | FSEQ_CNVIO_INIT_VERSION
[ 68.804252] iwlwifi 0000:09:00.0: 0x0000A652 | FSEQ_OTP_VERSION
[ 68.804264] iwlwifi 0000:09:00.0: 0x00000002 | FSEQ_TOP_CONTENT_VERSION
[ 68.804276] iwlwifi 0000:09:00.0: 0x4552414E | FSEQ_ALIVE_TOKEN
[ 68.804288] iwlwifi 0000:09:00.0: 0x00400410 | FSEQ_CNVI_ID
[ 68.804300] iwlwifi 0000:09:00.0: 0x00400410 | FSEQ_CNVR_ID
[ 68.804312] iwlwifi 0000:09:00.0: 0x00400410 | CNVI_AUX_MISC_CHIP
[ 68.804326] iwlwifi 0000:09:00.0: 0x00400410 | CNVR_AUX_MISC_CHIP
[ 68.804340] iwlwifi 0000:09:00.0: 0x00009061 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[ 68.804354] iwlwifi 0000:09:00.0: 0x00000061 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 68.804370] iwlwifi 0000:09:00.0: WRT: Collecting data: ini trigger 13 fired (delay=0ms).
[ 69.743608] iwlwifi 0000:09:00.0: Failed to run INIT ucode: -5
我曾尝试在这里和其他论坛上寻找解决此问题的方法，但到目前为止，似乎没有找到与此完全相同的问题。例如，这个问题涉及相同的 WiFi 硬件，但错误消息不同，并且隐藏 *.pnvm 文件的建议解决方案无法解决我的问题）。
您对解决这个问题有什么好主意吗？
更新
附加信息：
$ ls -al /usr/lib/firmware/*.pnvm
-rw-r--r-- 1 root root 41804 jan 10 11:19 /usr/lib/firmware/iwlwifi-so-a0-gf-a0.pnvm
$ ls -al /usr/lib/firmware/*.bak
-rw-r--r-- 1 root root 27456 jan 10 11:19 /usr/lib/firmware/iwlwifi-ty-a0-gf-a0.bak
正如评论中所建议的，我尝试将“usr/lib/firmware/iwlwifi-so-a0-gf-a0.pnvm”重命名为“usr/lib/firmware/iwlwifi-so-a0-gf-a0.pnvm.bak”来隐藏它，但这并没有解决我重启后的问题。
更新 2
通过使用先前安装的内核进行启动，我现在可以看到 WiFi 在内核“5.11.0-46-generic”下可以运行，但在“5.13.0-25-generic”和“5.13.0-27-generic”下却不行。
内核 5.11.0-46-generic 表示（在 中dmesg）：
iwlwifi 0000:09:00.0: loaded firmware version 59.601f3a66.0 ty-a0-gf-a0-59.ucode op_mode iwlmvm
并且它有效。
内核 5.13.0-27-generic 说：
iwlwifi 0000:09:00.0: loaded firmware version 63.c04f3485.0 ty-a0-gf-a0-63.ucode op_mode iwlmvm
但这是行不通的。
到目前为止，我的结论是内核版本和 WiFi 固件版本的这两个组合之间出现了问题。到目前为止，保留内核 5.11.0-46 解决了我的问题，但我当然需要一个解决方案，以便我可以使用更新的内核。
我已将此问题报告给 Ubuntu漏洞。