Public bug reported:

yesterday my laptop went down due to empty battery. After the reboot
there was no WLAN interface any more.

dmesg says;

# dmesg | grep iwl
[   10.064677] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version:
43.2.23.17
[   10.064963] iwlwifi 0000:00:14.3: loaded firmware version
48.4fa0041f.0 op_mode iwlmvm
[   10.147488] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9462,
REV=0x354
[   11.158645] iwlwifi 0000:00:14.3: Collecting data: trigger 15 fired.
[   11.158728] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[   11.158749] iwlwifi 0000:00:14.3: Status: 0x00000000, count: 112460234
[   11.158754] iwlwifi 0000:00:14.3: Loaded firmware version: 48.4fa0041f.0
[   11.158758] iwlwifi 0000:00:14.3: 0xE4CC9DFB | ADVANCED_SYSASSERT

[   11.158760] iwlwifi 0000:00:14.3: 0xB9E373EB | trm_hw_status0
[   11.158763] iwlwifi 0000:00:14.3: 0x70F95E5D | trm_hw_status1
[   11.158765] iwlwifi 0000:00:14.3: 0xF89E9DD8 | branchlink2
[   11.158767] iwlwifi 0000:00:14.3: 0x8E824365 | interruptlink1
[   11.158769] iwlwifi 0000:00:14.3: 0xA11CEDC1 | interruptlink2
[   11.158772] iwlwifi 0000:00:14.3: 0xD453408A | data1
[   11.158774] iwlwifi 0000:00:14.3: 0x6104FDAA | data2
[   11.158776] iwlwifi 0000:00:14.3: 0x2FA57FCD | data3
[   11.158778] iwlwifi 0000:00:14.3: 0x223E6081 | beacon time
[   11.158782] iwlwifi 0000:00:14.3: 0x9883002E | tsf low
[   11.158784] iwlwifi 0000:00:14.3: 0xD775322C | tsf hi
[   11.158787] iwlwifi 0000:00:14.3: 0xF3C7FB94 | time gp1
[   11.158789] iwlwifi 0000:00:14.3: 0x9CC87DD8 | time gp2
[   11.158792] iwlwifi 0000:00:14.3: 0x9BBC63F8 | uCode revision type
[   11.158795] iwlwifi 0000:00:14.3: 0xD4E50FCC | uCode version major
[   11.158797] iwlwifi 0000:00:14.3: 0x393D8F98 | uCode version minor
[   11.158800] iwlwifi 0000:00:14.3: 0xA2515C24 | hw version
[   11.158802] iwlwifi 0000:00:14.3: 0x95BFE5F2 | board version
[   11.158805] iwlwifi 0000:00:14.3: 0x8F1D46AF | hcmd
[   11.158808] iwlwifi 0000:00:14.3: 0xFE7C1EF0 | isr0
[   11.158812] iwlwifi 0000:00:14.3: 0x853A33B9 | isr1
[   11.158818] iwlwifi 0000:00:14.3: 0x090774CC | isr2
[   11.158823] iwlwifi 0000:00:14.3: 0xAF888EB5 | isr3
[   11.158828] iwlwifi 0000:00:14.3: 0x4CF5429A | isr4
[   11.158834] iwlwifi 0000:00:14.3: 0xE0071096 | last cmd Id
[   11.158839] iwlwifi 0000:00:14.3: 0x0037C610 | wait_event
[   11.158842] iwlwifi 0000:00:14.3: 0x99169B0C | l2p_control
[   11.158845] iwlwifi 0000:00:14.3: 0xFFAB69F6 | l2p_duration
[   11.158849] iwlwifi 0000:00:14.3: 0x85E21791 | l2p_mhvalid
[   11.158852] iwlwifi 0000:00:14.3: 0x3E1A233B | l2p_addr_match
[   11.158856] iwlwifi 0000:00:14.3: 0x742EA0CC | lmpm_pmg_sel
[   11.158859] iwlwifi 0000:00:14.3: 0xF85BFA13 | timestamp
[   11.158862] iwlwifi 0000:00:14.3: 0x337C67DF | flow_handler
[   11.158903] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[   11.158906] iwlwifi 0000:00:14.3: Status: 0x00000000, count: 7
[   11.158910] iwlwifi 0000:00:14.3: 0x201013F1 | ADVANCED_SYSASSERT
[   11.158913] iwlwifi 0000:00:14.3: 0x00000000 | umac branchlink1
[   11.158916] iwlwifi 0000:00:14.3: 0xC008CF5C | umac branchlink2
[   11.158918] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink1
[   11.158922] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink2
[   11.158925] iwlwifi 0000:00:14.3: 0x00000003 | umac data1
[   11.158928] iwlwifi 0000:00:14.3: 0x20000302 | umac data2
[   11.158931] iwlwifi 0000:00:14.3: 0x00000201 | umac data3
[   11.158934] iwlwifi 0000:00:14.3: 0x00000030 | umac major
[   11.158937] iwlwifi 0000:00:14.3: 0x4FA0041F | umac minor
[   11.158940] iwlwifi 0000:00:14.3: 0x00005CB7 | frame pointer
[   11.158944] iwlwifi 0000:00:14.3: 0xC0887F58 | stack pointer
[   11.158947] iwlwifi 0000:00:14.3: 0x00000000 | last host cmd
[   11.158950] iwlwifi 0000:00:14.3: 0x00000000 | isr status reg
[   11.158968] iwlwifi 0000:00:14.3: Fseq Registers:
[   11.158988] iwlwifi 0000:00:14.3: 0x00000003 | FSEQ_ERROR_CODE
[   11.159009] iwlwifi 0000:00:14.3: 0x00260000 | FSEQ_TOP_INIT_VERSION
[   11.159014] iwlwifi 0000:00:14.3: 0x00000000 | FSEQ_CNVIO_INIT_VERSION
[   11.159034] iwlwifi 0000:00:14.3: 0x0000A384 | FSEQ_OTP_VERSION
[   11.159056] iwlwifi 0000:00:14.3: 0x5C0C6AFC | FSEQ_TOP_CONTENT_VERSION
[   11.159077] iwlwifi 0000:00:14.3: 0x4552414E | FSEQ_ALIVE_TOKEN
[   11.159082] iwlwifi 0000:00:14.3: 0x20000302 | FSEQ_CNVI_ID
[   11.159101] iwlwifi 0000:00:14.3: 0x00000201 | FSEQ_CNVR_ID
[   11.159122] iwlwifi 0000:00:14.3: 0x20000302 | CNVI_AUX_MISC_CHIP
[   11.159145] iwlwifi 0000:00:14.3: 0x00000201 | CNVR_AUX_MISC_CHIP
[   11.159171] iwlwifi 0000:00:14.3: 0x0000485B |
CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[   11.159219] iwlwifi 0000:00:14.3: 0xA5A5A5A2 |
CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[   11.159275] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x5c23, CPU2
Status: 0x3
[   11.159281] iwlwifi 0000:00:14.3: Failed to start RT ucode: -110
[   11.159288] iwlwifi 0000:00:14.3: Firmware not running - cannot dump
error
[   11.170675] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -110


It seems there are some bug reports for  the firmware for the AC-9462
chip. But none of the solutions works for me. My 19.10 ubuntu is fully
patched. My kernel is

Linux nb004 5.3.0-40-generic #32-Ubuntu SMP Fri Jan 31 20:24:34 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux

Does it already load the lastet firmware (-48)? How can I check?

Do I need to install a new kernel?

I also installed the backport-iwlwifi-dkms, but I think there is no
driver for my card included in that package.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-40-generic 5.3.0-40.32
ProcVersionSignature: Ubuntu 5.3.0-40.32-generic 5.3.18
Uname: Linux 5.3.0-40-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.4
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  misch      1570 F.... pulseaudio
CurrentDesktop: KDE
Date: Thu Feb 27 12:40:04 2020
InstallationDate: Installed on 2019-12-08 (80 days ago)
InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: SCHENKER SCHENKER_SLIM14_SSL14L19
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-40-generic 
root=/dev/mapper/vgkubuntu-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-40-generic N/A
 linux-backports-modules-5.3.0-40-generic  N/A
 linux-firmware                            1.183.4
RfKill:
 0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/02/2019
dmi.bios.vendor: INSYDE Corp.
dmi.bios.version: 1.07.04RTR1
dmi.board.asset.tag: Tag 12345
dmi.board.name: N141CU
dmi.board.vendor: SCHENKER
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnINSYDECorp.:bvr1.07.04RTR1:bd10/02/2019:svnSCHENKER:pnSCHENKER_SLIM14_SSL14L19:pvrNotApplicable:rvnSCHENKER:rnN141CU:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:
dmi.product.family: Not Applicable
dmi.product.name: SCHENKER_SLIM14_SSL14L19
dmi.product.sku: Not Applicable
dmi.product.version: Not Applicable
dmi.sys.vendor: SCHENKER

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug eoan

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https://bugs.launchpad.net/bugs/1864991

Title:
  Lost wifi after cold restart: Intel 9462

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