"No Wi-Fi adapter found" on CentOS 7.9

Issues related to configuring your network
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shawkot
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"No Wi-Fi adapter found" on CentOS 7.9

Post by shawkot » 2021/05/22 10:55:26

I installed CentOS 7.9 on my machine yesterday. I installed "Server with GUI". Before installing "Server with GUI", I installed 'Minimal installation'. But in either case I can't connect to the internet via wirelessly. I tried a lot of solution, but nothing works!!
When I run ip a, it shows my wifi adapter. But not connected. Wi-Fi option is hashed on my menu bar.
When I run nmcli conn, it only shows ehternet device.
When I run nmcli d, it listed my wi-fi adapters as "unavailable".
How can I solve this problem?
Any help will be highly appreciated!
Thank you.

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TrevorH
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Re: "No Wi-Fi adapter found" on CentOS 7.9

Post by TrevorH » 2021/05/22 11:45:19

Post the output from lspci -nn | grep -i net
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

shawkot
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Re: "No Wi-Fi adapter found" on CentOS 7.9

Post by shawkot » 2021/05/22 13:25:22

lspci -nn | grep -i net
06:00.0 Network controller [0280]: Intel Corporation Wireless 3160 [8086:08b3] (rev 83)
07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller [10ec:8136] (rev 07)

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TrevorH
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Re: "No Wi-Fi adapter found" on CentOS 7.9

Post by TrevorH » 2021/05/22 13:53:46

When I run grep -i 8086 /lib/modules/$(uname -r)/modules.* | grep -i 08b3 that shows up as supported by the iwlwifi module. Is it loaded (lsmod | grep iwlwifi)? If it isn't then try loading it with modprobe iwlwifi. Are there any errors listed in dmesg | grep iwl ?
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

shawkot
Posts: 5
Joined: 2021/05/22 10:44:22

Re: "No Wi-Fi adapter found" on CentOS 7.9

Post by shawkot » 2021/05/22 14:12:30

I run lsmod | grep iwlwifi, and get following result:
lsmod | grep iwlwifi
iwlwifi 282445 1 iwlmvm
cfg80211 710816 4 iwlwifi,mac80211,rtlwifi,iwlmvm
I also run dmesg and find following result:

dmesg | grep iwl
[ 15.015089] iwlwifi 0000:06:00.0: irq 49 for MSI/MSI-X
[ 15.133576] iwlwifi 0000:06:00.0: loaded firmware version 17.3216344376.0 op_mode iwlmvm
[ 15.187632] iwlwifi 0000:06:00.0: Detected Intel(R) Dual Band Wireless AC 3160, REV=0x164
[ 15.192926] iwlwifi 0000:06:00.0: reporting RF_KILL (radio disabled)
[ 15.192944] iwlwifi 0000:06:00.0: RF_KILL bit toggled to disable radio.
[ 15.205780] iwlwifi 0000:06:00.0: base HW address: e4:02:9b:6d:60:28
[ 15.218115] ieee80211 phy1: Selected rate control algorithm 'iwl-mvm-rs'

I don't understand, what to do.
I tried to run the command nmcli radio wifi on, but it doesn't work!

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TrevorH
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Re: "No Wi-Fi adapter found" on CentOS 7.9

Post by TrevorH » 2021/05/22 16:34:35

I am no expert but that appears to me to be saying that the radio is disabled. A quick Google says that running rfkill unblock all as root should fix it but it may only be for the current boot. Try it and see if it works.

What sort of machine is this?
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

shawkot
Posts: 5
Joined: 2021/05/22 10:44:22

Re: "No Wi-Fi adapter found" on CentOS 7.9

Post by shawkot » 2021/05/22 18:28:34

I tried the command sudo rfkill unblock all, it didn't work.
My machine is Dell inspiron 3558

shawkot
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Re: "No Wi-Fi adapter found" on CentOS 7.9

Post by shawkot » 2021/05/23 06:39:16

Finally it solves!
I just need to turn it on via a key combination on my machine.
For my laptop it's Fn+PrtScr
Thanks for your time and effort. Really appreciate that.

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