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Hello,

TL;DR

I recently cold booted my laptop and the wifi stopped working. Both wifi and bluetooth don't work but my priority is having wifi working. I tried searching for a solution for three days (including pertinent bugs and patches). However, I have not been able to find a fix yet. It used to work before and I have the wireless-info.txt for that too. If needed, I can upload it too.

Relevant specs:
---------------
Operating System:
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal

PC make: Dell Inspiron 7586 2-in-1

[email protected]:~$ dmesg | grep iwl
[ 7.308388] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[ 7.321602] iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
[ 7.321606] iwlwifi 0000:00:14.3: Found debug configuration: 0
[ 7.322475] iwlwifi 0000:00:14.3: loaded firmware version 46.8902351f.0 op_mode iwlmvm
[ 7.358023] iwlwifi 0000:00:14.3: Detected Intel® Dual Band Wireless AC 9460, REV=0x318
[ 7.365714] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 7.366888] iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
[ 7.371425] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[ 7.371432] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
[ 7.371442] iwlwifi 0000:00:14.3: Fseq Registers:
[ 7.371445] iwlwifi 0000:00:14.3: 0x8000E404 | FSEQ_ERROR_CODE
[ 7.371455] iwlwifi 0000:00:14.3: 0x1440C788 | FSEQ_TOP_INIT_VERSION
[ 7.371458] iwlwifi 0000:00:14.3: 0x45163477 | FSEQ_CNVIO_INIT_VERSION
[ 7.371461] iwlwifi 0000:00:14.3: 0x055260E5 | FSEQ_OTP_VERSION
[ 7.371464] iwlwifi 0000:00:14.3: 0x39B2FADF | FSEQ_TOP_CONTENT_VERSION
[ 7.371466] iwlwifi 0000:00:14.3: 0xC3BBD7F0 | FSEQ_ALIVE_TOKEN
[ 7.371469] iwlwifi 0000:00:14.3: 0x00489810 | FSEQ_CNVI_ID
[ 7.371472] iwlwifi 0000:00:14.3: 0xF7EA67FF | FSEQ_CNVR_ID
[ 7.371475] iwlwifi 0000:00:14.3: 0x01000100 | CNVI_AUX_MISC_CHIP
[ 7.371511] iwlwifi 0000:00:14.3: 0xA5A5A5A2 | CNVR_AUX_MISC_CHIP
[ 7.371586] iwlwifi 0000:00:14.3: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[ 7.371662] iwlwifi 0000:00:14.3: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 7.371866] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0xa5a5a5a2, CPU2 Status: 0xa5a5a5a2
[ 7.371877] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
[ 7.371880] iwlwifi 0000:00:14.3: Collecting data: trigger 16 fired.
[ 7.618273] iwlwifi 0000:00:14.3: Firmware not running - cannot dump error
[ 7.630421] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5

[email protected]:~$ lspci
00:14.3 Network controller: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] (rev 30)

[email protected]:~$ rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

* I dont know why I do not have a WLAN option (it was there previously).

Here is the link to my wireless-info.txt for further scrutiny.
https://pastebin.com/d4keAusL

* I have currently tethered my connection to my phone and that is why there is an Ethernet option and usb0 in wireless-info.txt in ifconfig.
* I tried loading other iwlwifi firmware versions (including the -34.ucode from Intel and Dell and also the -33, -34, -38, -41, -43 and -46.ucode from /lib/firmware)

[email protected]:~$ apt list | grep linux-firmware
linux-firmware/now 1.189 all [installed,local]

[email protected]:~$ uname -r
5.4.0-42-generic

[email protected]:~$ sudo lshw -C network
[sudo] password for name:
*-network
description: Network controller
product: Cannon Point-LP CNVi [Wireless-AC]
vendor: Intel Corporation
physical id: 14.3
bus info: [email protected]:00:14.3
version: 30
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list
configuration: driver=iwlwifi latency=0
resources: irq:16 memory:a121c000-a121ffff
*-network
description: Ethernet interface
physical id: 2
bus info: [email protected]:4
logical name: usb0
serial: 42:8a:b8:cf:17:bd
capabilities: ethernet physical
configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.39 link=yes multicast=yes

Note: I have an Intel Wireless AC 9560 wireless card.
10-14-2020, 07:13 AM
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