[SOLVED] No wifi adapter found

[mzamkovs]

Hi,
I just did a clean install of Centos 8 and have a problem to get wifi working - the wired connection works fine.
The Network Manager reports: "No wifi adapter found".
Here are some system specifications and network related prints:

Device: Lenovo Legion Y540

Version:

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Linux version 4.18.0-147.8.1.el8_1.x86_64

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 > lspci -v
 00:14.3 Network controller: Intel Corporation Wireless-AC 9560 [Jefferson Peak] (rev 10)
	Subsystem: Intel Corporation Device 0034
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at b4518000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [80] MSI-X: Enable+ Count=16 Masked-
	Capabilities: [100] #00
	Capabilities: [14c] Latency Tolerance Reporting
	Capabilities: [164] Vendor Specific Information: ID=0010 Rev=0 Len=014 <?>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi
	

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> nmcli device status
DEVICE      TYPE      STATE        CONNECTION 
enp7s0      ethernet  connected    enp7s0     
virbr0      bridge    connected    virbr0     
wlp0s20f3   wifi      unavailable  --         
lo          loopback  unmanaged    --         
virbr0-nic  tun       unmanaged    --

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> nmcli general status
STATE      CONNECTIVITY  WIFI-HW  WIFI      WWAN-HW  WWAN    
connected  full          enabled  disabled  enabled  enabled 

I have tried to change the firmware that came with the distribution (46) with the one I found here: https://www.intel.co.uk/content/www/uk/ ... rking.html, but with no help

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> dmesg | grep iwl
[    4.775803] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-46.ucode failed with error -2
[    4.775810] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-45.ucode failed with error -2
[    4.775816] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-44.ucode failed with error -2
[    4.775822] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-43.ucode failed with error -2
[    4.775827] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-42.ucode failed with error -2
[    4.775832] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-41.ucode failed with error -2
[    4.775838] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-40.ucode failed with error -2
[    4.775844] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-39.ucode failed with error -2
[    4.775849] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-38.ucode failed with error -2
[    4.775855] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-37.ucode failed with error -2
[    4.775861] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-36.ucode failed with error -2
[    4.775867] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-35.ucode failed with error -2
[    4.777937] iwlwifi 0000:00:14.3: loaded firmware version 34.3125811985.0 op_mode iwlmvm
[    4.873543] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318
[    4.926661] iwlwifi 0000:00:14.3: base HW address: c8:09:a8:bf:b6:52
[    5.010986] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[    5.082929] iwlwifi 0000:00:14.3 wlp0s20f3: renamed from wlan0

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> rfkill list
0: ideapad_wlan: Wireless LAN
	Soft blocked: no
	Hard blocked: yes
1: ideapad_bluetooth: Bluetooth
	Soft blocked: no
	Hard blocked: yes
2: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
3: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no

Network Manager seems to be working:

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> systemctl status NetworkManager
● NetworkManager.service - Network Manager
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2020-04-26 10:44:35 EDT; 21min ago
     Docs: man:NetworkManager(8)
 Main PID: 1665 (NetworkManager)
    Tasks: 4 (limit: 26213)
   Memory: 14.6M
   CGroup: /system.slice/NetworkManager.service
           └─1665 /usr/sbin/NetworkManager --no-daemon

Apr 26 10:44:38 localhost.localdomain NetworkManager[1665]: <info>  [1587912278.3322] manager: NetworkManager state is now CONNECTED_GLOBAL
Apr 26 10:44:38 localhost.localdomain NetworkManager[1665]: <info>  [1587912278.3325] manager: startup complete
Apr 26 10:44:39 localhost.localdomain NetworkManager[1665]: <info>  [1587912279.2031] dhcp6 (enp7s0): activation: beginning transaction (timeout in 45 seconds)
Apr 26 10:44:39 localhost.localdomain NetworkManager[1665]: <info>  [1587912279.2040] policy: set 'enp7s0' (enp7s0) as default for IPv6 routing and DNS
Apr 26 10:44:39 localhost.localdomain NetworkManager[1665]: <info>  [1587912279.2125] dhcp6 (enp7s0): state changed unknown -> bound
Apr 26 10:44:54 localhost.localdomain NetworkManager[1665]: <info>  [1587912294.0827] agent-manager: req[0x55804a800d10, :1.301/org.gnome.Shell.NetworkAgent/1000]: agent registered
Apr 26 10:45:06 localhost.localdomain NetworkManager[1665]: <info>  [1587912306.1136] audit: op="radio-control" arg="wireless-enabled" pid=3838 uid=1000 result="success"
Apr 26 10:49:02 localhost.localdomain NetworkManager[1665]: <info>  [1587912542.1559] policy: set 'enp7s0' (enp7s0) as default for IPv6 routing and DNS
Apr 26 10:49:02 localhost.localdomain NetworkManager[1665]: <info>  [1587912542.3094] policy: set 'enp7s0' (enp7s0) as default for IPv6 routing and DNS
Apr 26 10:56:15 localhost.localdomain NetworkManager[1665]: <info>  [1587912975.8263] agent-manager: req[0x7fc504008430, :1.301/org.gnome.Shell.NetworkAgent/1000]: agent registered

Please help!
Thank you,
Michal

[TrevorH]

Is NetworkManager-wifi installed?

[mzamkovs]

Yes, I have NetworkManager-wifi-1:1.20.0-5.el8_1.x86_64.

[mzamkovs]

There is one thing in my mind.
In /etc/sysconfig/network-scripts/ is only one file: ifcfg-enp7s0, which corresponds to wired connection.
There is no config file for wlp0s20f3, which is a name of the wireless adapter.
Should I create this file and just use ifup command to start it? - In a case, what should I change wrt ifcfg-enp7s0 file?
In my ifcfg-enp7s0 I have following:

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TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp7s0
UUID=7aa86331-379d-48c7-950c-f15019af3e23
DEVICE=enp7s0
ONBOOT=yes

And checking

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> ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether f8:75:a4:4d:29:b0 brd ff:ff:ff:ff:ff:ff
3: wlp0s20f3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 9e:58:6d:b8:9a:47 brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:69:d9:71 brd ff:ff:ff:ff:ff:ff
5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:69:d9:71 brd ff:ff:ff:ff:ff:ff

I see that wireless is recognized but not turned on.
Thank you!

[mzamkovs]

Solution found on the Ubuntu forum: https://askubuntu.com/questions/893384/ ... untu-16-04

Solution

Add:

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tee /etc/modprobe.d/blacklist-ideapad.conf <<< "blacklist ideapad_laptop"

and restart...