Lenovo Yoga C740 does not work with WiFi AFTER install of 19.10

Question

I recently booted and installed 19.10 on my new Lenovo Yoga C740. The Intel WiFi adapter worked perfectly fine when I was running from the live boot.

However, there was no WiFi available after I did the install and rebooted from the newly installed OS on the internal drive.

How may I troubleshoot this to get WiFi working again?

lspci -knn | grep Net -A3; rfkill list; dmesg | grep iwl

00:14.3 Network controller [0280]: Intel Corporation Device [8086:02f0]

Subsystem: Intel Corporation Device [8086:0034]

Kernel driver in use: iwlwifi

Kernel modules: iwlwifi

0: ideapad_wlan: Wireless LAN

Soft blocked: no

Hard blocked: no

1: ideapad_bluetooth: Bluetooth

Soft blocked: yes

Hard blocked: no

2: hci0: Bluetooth

Soft blocked: yes

Hard blocked: no

[ 3.580003] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: 43.2.23.17

[ 3.580289] iwlwifi 0000:00:14.3: loaded firmware version 48.4fa0041f.0 op_mode iwlmvm

[ 3.683901] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560, REV=0x354

[ 4.696901] iwlwifi 0000:00:14.3: Collecting data: trigger 15 fired.

[ 4.696994] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:

[ 4.696998] iwlwifi 0000:00:14.3: Status: 0x00000000, count: -367666734

[ 4.697000] iwlwifi 0000:00:14.3: Loaded firmware version: 48.4fa0041f.0

[ 4.697002] iwlwifi 0000:00:14.3: 0x5FF7BFD0 | ADVANCED_SYSASSERT

[ 4.697004] iwlwifi 0000:00:14.3: 0x099758B5 | trm_hw_status0

[ 4.697005] iwlwifi 0000:00:14.3: 0x15DAD418 | trm_hw_status1

[ 4.697007] iwlwifi 0000:00:14.3: 0xD6EC2FEB | branchlink2

[ 4.697008] iwlwifi 0000:00:14.3: 0xF3F3EB2E | interruptlink1

[ 4.697010] iwlwifi 0000:00:14.3: 0x0C0A10A1 | interruptlink2

[ 4.697011] iwlwifi 0000:00:14.3: 0x2A5D6F28 | data1

[ 4.697013] iwlwifi 0000:00:14.3: 0xFF578F7A | data2

[ 4.697014] iwlwifi 0000:00:14.3: 0xF4731EBD | data3

[ 4.697016] iwlwifi 0000:00:14.3: 0x166D8A42 | beacon time

[ 4.697017] iwlwifi 0000:00:14.3: 0x66F00216 | tsf low

[ 4.697019] iwlwifi 0000:00:14.3: 0x7EDD8D2D | tsf hi

[ 4.697020] iwlwifi 0000:00:14.3: 0xAB5F7BB7 | time gp1

[ 4.697022] iwlwifi 0000:00:14.3: 0x08F016A6 | time gp2

[ 4.697023] iwlwifi 0000:00:14.3: 0xB10CAC32 | uCode revision type

[ 4.697024] iwlwifi 0000:00:14.3: 0xB36D6AAF | uCode version major

[ 4.697026] iwlwifi 0000:00:14.3: 0xFC03DE7E | uCode version minor

[ 4.697027] iwlwifi 0000:00:14.3: 0x7BD936B5 | hw version

[ 4.697029] iwlwifi 0000:00:14.3: 0x19584EBD | board version

[ 4.697030] iwlwifi 0000:00:14.3: 0x182139F9 | hcmd

[ 4.697032] iwlwifi 0000:00:14.3: 0x9DE48EFE | isr0

[ 4.697033] iwlwifi 0000:00:14.3: 0xA7799BF2 | isr1

[ 4.697035] iwlwifi 0000:00:14.3: 0x165BD80E | isr2

[ 4.697036] iwlwifi 0000:00:14.3: 0xB0A00597 | isr3

[ 4.697037] iwlwifi 0000:00:14.3: 0x68EA89CB | isr4

[ 4.697039] iwlwifi 0000:00:14.3: 0xFB1A94EB | last cmd Id

[ 4.697040] iwlwifi 0000:00:14.3: 0xAA858B3A | wait_event

[ 4.697042] iwlwifi 0000:00:14.3: 0xDD336702 | l2p_control

[ 4.697043] iwlwifi 0000:00:14.3: 0x31F07DEE | l2p_duration

[ 4.697045] iwlwifi 0000:00:14.3: 0xF1BF5F96 | l2p_mhvalid

[ 4.697046] iwlwifi 0000:00:14.3: 0x41053061 | l2p_addr_match

[ 4.697048] iwlwifi 0000:00:14.3: 0x6615008F | lmpm_pmg_sel

[ 4.697049] iwlwifi 0000:00:14.3: 0xDDCE6E36 | timestamp

[ 4.697051] iwlwifi 0000:00:14.3: 0x2DEAB302 | flow_handler

[ 4.697095] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:

[ 4.697097] iwlwifi 0000:00:14.3: Status: 0x00000000, count: 7

[ 4.697099] iwlwifi 0000:00:14.3: 0x201013F1 | ADVANCED_SYSASSERT

[ 4.697100] iwlwifi 0000:00:14.3: 0x00000000 | umac branchlink1

[ 4.697102] iwlwifi 0000:00:14.3: 0xC008CF5C | umac branchlink2

[ 4.697103] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink1

[ 4.697105] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink2

[ 4.697106] iwlwifi 0000:00:14.3: 0x00000003 | umac data1

[ 4.697108] iwlwifi 0000:00:14.3: 0x20000302 | umac data2

[ 4.697109] iwlwifi 0000:00:14.3: 0x01300202 | umac data3

[ 4.697111] iwlwifi 0000:00:14.3: 0x00000030 | umac major

[ 4.697112] iwlwifi 0000:00:14.3: 0x4FA0041F | umac minor

[ 4.697114] iwlwifi 0000:00:14.3: 0x00005CF0 | frame pointer

[ 4.697115] iwlwifi 0000:00:14.3: 0xC0887F58 | stack pointer

[ 4.697117] iwlwifi 0000:00:14.3: 0x00000000 | last host cmd

[ 4.697118] iwlwifi 0000:00:14.3: 0x00000000 | isr status reg

[ 4.697144] iwlwifi 0000:00:14.3: Fseq Registers:

[ 4.697147] iwlwifi 0000:00:14.3: 0x00000003 | FSEQ_ERROR_CODE

[ 4.697150] iwlwifi 0000:00:14.3: 0x00000000 | FSEQ_TOP_INIT_VERSION

[ 4.697154] iwlwifi 0000:00:14.3: 0x37481218 | FSEQ_CNVIO_INIT_VERSION

[ 4.697157] iwlwifi 0000:00:14.3: 0x0000A384 | FSEQ_OTP_VERSION

[ 4.697160] iwlwifi 0000:00:14.3: 0x004C9625 | FSEQ_TOP_CONTENT_VERSION

[ 4.697163] iwlwifi 0000:00:14.3: 0x09065109 | FSEQ_ALIVE_TOKEN

[ 4.697166] iwlwifi 0000:00:14.3: 0x90AF1D9C | FSEQ_CNVI_ID

[ 4.697169] iwlwifi 0000:00:14.3: 0x2A6212BC | FSEQ_CNVR_ID

[ 4.697172] iwlwifi 0000:00:14.3: 0x20000302 | CNVI_AUX_MISC_CHIP

[ 4.697178] iwlwifi 0000:00:14.3: 0x01300202 | CNVR_AUX_MISC_CHIP

[ 4.697183] iwlwifi 0000:00:14.3: 0x0000485B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM

[ 4.697235] iwlwifi 0000:00:14.3: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR

[ 4.697265] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x5c5a, CPU2 Status: 0x3

[ 4.697267] iwlwifi 0000:00:14.3: Failed to start RT ucode: -110

[ 4.697270] iwlwifi 0000:00:14.3: Firmware not running - cannot dump error

[ 4.708935] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -110

10

Answer 1

I was able to fix this problem using the following link that was provided by Rick. https://askubuntu.com/a/1212588/231928

I used a USB C hub that had an Ethernet port to connect to the repositories.

Thank you very much.