2 台 ThinkPad X1 Yoga 4th，A 搭载的是 Ubuntu 19.10，内核 5.3.0-18，B 搭载的是 Ubuntu 19.10，内核 5.3.0-29，两台 wifi（Intel ac 9560）均可正常工作。
更新了这两台笔记本电脑（sudo apt update，sudo apt upgrade），然后内核更新到 5.3.0-40，但是 WiFi 图标消失了，无法通过 WiFi 连接互联网。
安装驱动程序或更新/lib/firmware不起作用。
但是当启动到旧内核版本（5.3.0-18 / 29）时，WiFi 可以正常工作。
如何在具有 5.3.0-40 内核的 Ubuntu 19.10 上启用 WiFi Intel ac 9560？
dmesg 错误：
[ 0.837843] tpm tpm0: tpm_try_transmit: send(): error -5
[ 0.837846] tpm tpm0: [Firmware Bug]: TPM interrupt not working, polling instead
[ 1.327684] i2c_hid i2c-SYNA8005:00: failed to retrieve report from device.
[ 2.290041] irq 31: nobody cared (try booting with the "irqpoll" option)
[ 2.290077] handlers:
[ 2.290079] [<0000000042ddd934>] tis_int_handler
[ 3.069570] i2c_hid i2c-SYNA8005:00: failed to retrieve report from device.
[ 4.009236] iwlwifi 0000:00:14.3: Collecting data: trigger 15 fired.
[ 4.009314] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[ 4.009317] iwlwifi 0000:00:14.3: Status: 0x00000000, coudmesg errors:nt: 169840516
[ 4.009319] iwlwifi 0000:00:14.3: Loaded firmware version: 48.4fa0041f.0
[ 4.009320] iwlwifi 0000:00:14.3: 0x7EB08CBE | ADVANCED_SYSASSERT
[ 4.009322] iwlwifi 0000:00:14.3: 0xD34B1C42 | trm_hw_status0
[ 4.009323] iwlwifi 0000:00:14.3: 0x2A83D5B1 | trm_hw_stadmesg
errors:tus1
[ 4.009324] iwlwifi 0000:00:14.3: 0xFE3AE448 | branchlink2
[ 4.009325] iwlwifi 0000:00:14.3: 0x91D0D28B | interruptlink1
[ 4.009326] iwlwifi 0000:00:14.3: 0x0867EB65 | interruptlink2
[ 4.009327] iwlwifi 0000:00:14.3: 0xBCAF51DF | data1
[ 4.009328] iwlwifi 0000:00:14.3: 0xF406D8B4 | data2
[ 4.009329] iwlwifi 0000:00:14.3: 0xB9E671E4 | data3
[ 4.009330] iwlwifi 0000:00:14.3: 0x71635431 | beacon time
[ 4.009332] iwlwifi 0000:00:14.3: 0x0EF3B01B | tsf low
[ 4.009333] iwlwifi 0000:00:14.3: 0x7A06466F | tsf hi
[ 4.009334] iwlwifi 0000:00:14.3: 0x48166D12 | time gp1
[ 4.009335] iwlwifi 0000:00:14.3: 0x7DA5A66B | time gp2
[ 4.009336] iwlwifi 0000:00:14.3: 0xF8A87C4B | uCode revision type
[ 4.009337] iwlwifi 0000:00:14.3: 0xCF185A20 | uCode version major
[ 4.009338] iwlwifi 0000:00:14.3: 0x82643A8B | uCode version minor
[ 4.009339] iwlwifi 0000:00:14.3: 0x3FA9F91A | hw version
[ 4.009340] iwlwifi 0000:00:14.3: 0xD03FB09D | board version
[ 4.009342] iwlwifi 0000:00:14.3: 0x6328571D | hcmd
[ 4.009343] iwlwifi 0000:00:14.3: 0xD7C8B92C | isr0
[ 4.009344] iwlwifi 0000:00:14.3: 0xA7167883 | isr1
[ 4.009345] iwlwifi 0000:00:14.3: 0x812F083B | isr2
[ 4.009346] iwlwifi 0000:00:14.3: 0xF12501FA | isr3
[ 4.009347] iwlwifi 0000:00:14.3: 0xEB193E2C | isr4
[ 4.009348] iwlwifi 0000:00:14.3: 0xB2E1167E | last cmd Id
[ 4.009349] iwlwifi 0000:00:14.3: 0xA2FD022E | wait_event
[ 4.009350] iwlwifi 0000:00:14.3: 0x21CBC8B9 | l2p_control
[ 4.009351] iwlwifi 0000:00:14.3: 0x4FFF1333 | l2p_duration
[ 4.009352] iwlwifi 0000:00:14.3: 0x08AE50F2 | l2p_mhvalid
[ 4.009353] iwlwifi 0000:00:14.3: 0x72195CAC | l2p_addr_match
[ 4.009354] iwlwifi 0000:00:14.3: 0x2CE4DAA5 | lmpm_pmg_sel
[ 4.009356] iwlwifi 0000:00:14.3: 0x23653546 | timestamp
[ 4.009357] iwlwifi 0000:00:14.3: 0xCEA83EB8 | flow_handler
[ 4.009388] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[ 4.009389] iwlwifi 0000:00:14.3: Status: 0x00000000, count: 7
[ 4.009390] iwlwifi 0000:00:14.3: 0x201013F1 | ADVANCED_SYSASSERT
[ 4.009391] iwlwifi 0000:00:14.3: 0x00000000 | umac branchlink1
[ 4.009393] iwlwifi 0000:00:14.3: 0xC008CF5C | umac branchlink2
[ 4.009394] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink1
[ 4.009395] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink2
[ 4.009396] iwlwifi 0000:00:14.3: 0x00000003 | umac data1
[ 4.009397] iwlwifi 0000:00:14.3: 0x20000302 | umac data2
[ 4.009398] iwlwifi 0000:00:14.3: 0x01300202 | umac data3
[ 4.009399] iwlwifi 0000:00:14.3: 0x00000030 | umac major
[ 4.009400] iwlwifi 0000:00:14.3: 0x4FA0041F | umac minor
[ 4.009401] iwlwifi 0000:00:14.3: 0x00005D2C | frame pointer
[ 4.009402] iwlwifi 0000:00:14.3: 0xC0887F58 | stack pointer
[ 4.009403] iwlwifi 0000:00:14.3: 0x00000000 | last host cmd
[ 4.009405] iwlwifi 0000:00:14.3: 0x00000000 | isr status reg
[ 4.009421] iwlwifi 0000:00:14.3: Fseq Registers:
[ 4.009424] iwlwifi 0000:00:14.3: 0x00000003 | FSEQ_ERROR_CODE
[ 4.009427] iwlwifi 0000:00:14.3: 0x00000000 | FSEQ_TOP_INIT_VERSION
[ 4.009429] iwlwifi 0000:00:14.3: 0xE6C42F2D | FSEQ_CNVIO_INIT_VERSION
[ 4.009432] iwlwifi 0000:00:14.3: 0x0000A384 | FSEQ_OTP_VERSION
[ 4.009435] iwlwifi 0000:00:14.3: 0x127104E1 | FSEQ_TOP_CONTENT_VERSION
[ 4.009438] iwlwifi 0000:00:14.3: 0xACAED0E2 | FSEQ_ALIVE_TOKEN
[ 4.009440] iwlwifi 0000:00:14.3: 0x2EE283C1 | FSEQ_CNVI_ID
[ 4.009443] iwlwifi 0000:00:14.3: 0xE5CDB8CB | FSEQ_CNVR_ID
[ 4.009446] iwlwifi 0000:00:14.3: 0x20000302 | CNVI_AUX_MISC_CHIP
[ 4.009451] iwlwifi 0000:00:14.3: 0x01300202 | CNVR_AUX_MISC_CHIP
[ 4.009456] iwlwifi 0000:00:14.3: 0x0000485B |
CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[ 4.009491] iwlwifi 0000:00:14.3: 0xA5A5A5A2 |
CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 4.009524] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x5c94, CPU2
Status: 0x3
[ 4.009525] iwlwifi 0000:00:14.3: Failed to start RT ucode: -110
[ 4.009535] iwlwifi 0000:00:14.3: Firmware not running - cannot dump error
[ 4.022490] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -110