Intel® Wireless-AC 9462 “No WiFi Adapter Found”

Issues related to configuring your network

User avatar
TrevorH
Forum Moderator
Posts: 29105
Joined: 2009/09/24 10:40:56
Location: Brighton, UK

Re: Intel® Wireless-AC 9462 “No WiFi Adapter Found”

Post by TrevorH » 2020/06/28 12:37:19

Yes, that also looks possible but to fix that will need a code change and a kernel rebuild. You might want to look through the bug reports on bugzilla.redhat.com and see if there are already tickets for this and if not, report it. Since CentOS 8 uses a 4.18 kernel, for this to be the same problem as that, Red Hat would have needed to pick up the code and backport it from 5.4 to their kernel.

Looking at the kernel changelog, there does look like a fix entry that might be relevant in the 8.2 kernel changelog. Are you running that kernel?

Code: Select all

- [netdrv] iwlwifi: pcie: fix merge damage on making QnJ exclusive (Jarod Wilson) [1776606]
Unfortunately the 1776606 bugzilla entry it references is marked private and I cannot see its contents to check if it is this problem or not.

The fix I mention is listed as being part of 4.18.0-166.el8 so if the uname -r command tells you that you are running a version less than this, then it may be your problem. The easy way to get that fix would be to attach a LAN cable and run yum update and get to 8.2. Otherwise, if you have no network, you will need to download the various kernel* rpms (kernel, kernel-core, kernel-doc, kernel-modules and kernel-tools and maybe others too) from one of the mirrors, put them on a USB stick and install them manually.
CentOS 6 will die in November 2020 - migrate sooner rather than later!
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 is dead, do not use it.
Full time Geek, part time moderator. Use the FAQ Luke

joseluisbz
Posts: 13
Joined: 2020/06/25 18:24:42

Re: Intel® Wireless-AC 9462 “No WiFi Adapter Found”

Post by joseluisbz » 2020/06/28 20:09:49

TrevorH wrote:
2020/06/28 12:37:19
Yes, that also looks possible but to fix that will need a code change and a kernel rebuild.
I was viewing this video: https://www.youtube.com/watch?v=3kAcX9BswuA
Do you mean that a solution could be to do what is explained in this video?

I was checking with modinfo iwlwifi

Code: Select all

filename:       /lib/modules/4.18.0-193.6.3.el8_2.x86_64/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko.xz
license:        GPL
author:         Copyright(c) 2003- 2015 Intel Corporation <linuxwifi@intel.com>
description:    Intel(R) Wireless WiFi driver for Linux
firmware:       iwlwifi-100-5.ucode
firmware:       iwlwifi-1000-5.ucode
firmware:       iwlwifi-135-6.ucode
firmware:       iwlwifi-105-6.ucode
firmware:       iwlwifi-2030-6.ucode
firmware:       iwlwifi-2000-6.ucode
firmware:       iwlwifi-5150-2.ucode
firmware:       iwlwifi-5000-5.ucode
firmware:       iwlwifi-6000g2b-6.ucode
firmware:       iwlwifi-6000g2a-6.ucode
firmware:       iwlwifi-6050-5.ucode
firmware:       iwlwifi-6000-6.ucode
firmware:       iwlwifi-7265D-29.ucode
firmware:       iwlwifi-7265-17.ucode
firmware:       iwlwifi-3168-29.ucode
firmware:       iwlwifi-3160-17.ucode
firmware:       iwlwifi-7260-17.ucode
firmware:       iwlwifi-8265-36.ucode
firmware:       iwlwifi-8000C-36.ucode
firmware:       iwlwifi-9260-th-b0-jf-b0-46.ucode
firmware:       iwlwifi-9000-pu-b0-jf-b0-46.ucode
firmware:       iwlwifi-ty-a0-gf-a0-50.ucode
firmware:       iwlwifi-so-a0-gf-a0-50.ucode
firmware:       iwlwifi-so-a0-hr-b0-50.ucode
firmware:       iwlwifi-so-a0-jf-b0-50.ucode
firmware:       iwlwifi-cc-a0-50.ucode
firmware:       iwlwifi-QuQnj-b0-jf-b0-50.ucode
firmware:       iwlwifi-QuZ-a0-jf-b0-50.ucode
firmware:       iwlwifi-QuZ-a0-hr-b0-50.ucode
firmware:       iwlwifi-Qu-b0-jf-b0-50.ucode
firmware:       iwlwifi-Qu-c0-hr-b0-50.ucode
firmware:       iwlwifi-QuQnj-a0-hr-a0-50.ucode
firmware:       iwlwifi-QuQnj-b0-hr-b0-50.ucode
firmware:       iwlwifi-QuQnj-f0-hr-a0-50.ucode
firmware:       iwlwifi-Qu-a0-jf-b0-50.ucode
firmware:       iwlwifi-Qu-a0-hr-a0-50.ucode
rhelversion:    8.2
srcversion:     54ED6E4B7A8E1C86BBD3622

										
									....REMOVED PART IN ORDER TO BE SHORTER!!!!!

parm:           swcrypto:using crypto in software (default 0 [hardware]) (int)
parm:           11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm:           amsdu_size:amsdu size 0: 12K for multi Rx queue devices, 2K for 22560 devices, 4K for other devices 1:4K 2:8K 3:12K 4: 2K (default 0) (int)
parm:           fw_restart:restart firmware in case of error (default true) (bool)
parm:           antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
parm:           nvm_file:NVM file name (charp)
parm:           lar_disable:disable LAR functionality (default: N) (bool)
parm:           uapsd_disable:disable U-APSD functionality bitmap 1: BSS 2: P2P Client (default: 3) (uint)
parm:           enable_ini:Enable debug INI TLV FW debug infrastructure (default: 0 (bool)
parm:           bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm:           led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm:           power_save:enable WiFi power management (default: disable) (bool)
parm:           power_level:default power save level (range from 1 - 5, default: 1) (int)
parm:           fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)
parm:           disable_11ac:Disable VHT capabilities (default: false) (bool)
parm:           remove_when_gone:Remove dev from PCIe bus if it is deemed inaccessible (default: false) (bool)
parm:           disable_11ax:Disable HE capabilities (default: false) (bool)
Would I have to rebuild the iwlwifi.ko.xz module?

TrevorH wrote:
2020/06/28 12:37:19
Looking at the kernel changelog, there does look like a fix entry that might be relevant in the 8.2 kernel changelog. Are you running that kernel?

Code: Select all

[joseluisbz@centos ~]$ uname -r
4.18.0-193.6.3.el8_2.x86_64
[joseluisbz@centos ~]


I post a question (Replace original ko.xz module in CentOS 8 with patched module) with my Is my new situation (https://unix.stackexchange.com/questions/595576)

Post Reply

Return to “CentOS 8 - Networking Support”