Wifi Card/On Board Wifi Not Detected

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Excalibur1224
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Wifi Card/On Board Wifi Not Detected

Post by Excalibur1224 » 2019/04/26 20:49:23

I am very new to linux and I am trying to create a small NAS for a school project. To do this I re purposed my everyday computer to run the NAS for the project. However, after successfully loading CentOS neither my on board wifi nor wifi card was detected, and can't find any solution that works/I understand. I originally tried just the on board wifi and then added the card after that didn't work. I know the hardware itself works so it's a matter of software or drivers, but I'm not sure which and can't find a good answer anywhere.

Specs wise I am running an 8700k @ 4.9 GHz, 16gb of 3700mhz ddr4 ram, a Maximus Code X board (with on board wifi that works fine when Windows is running), and the wifi card is a TP-Link Archer T9E AC1900. I would greatly appreciate some newbie level help as I am still very new to linux in general but I can sort of get around the terminal. Feel free to ask anymore clarifying questions.

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IkumiMashiba
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Re: Wifi Card/On Board Wifi Not Detected

Post by IkumiMashiba » 2019/05/13 07:03:17

It may be possible. It may be your reference. I have not tried.

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echo 'options iwlwifi 11n_disable=1 wd_disable=1' > /etc/modprobe.d/iwlwifi.conf
reboot

nmcli c a type wifi con-name CONN ifname wlan0 ssid wifi1 wifi-sec.key-mgmt wpa-psk wifi-sec.psk PASSWORD
nmcli c u CONN
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TrevorH
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Re: Wifi Card/On Board Wifi Not Detected

Post by TrevorH » 2019/05/13 13:03:11

Post the output from lspci -nn | grep -i net and any relevant lsusb output too. I suspect there is no driver for that card included in the CentOS 7 kernel.
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Peek
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Re: Wifi Card/On Board Wifi Not Detected

Post by Peek » 2019/06/05 08:13:41

It seems we're in the same boat. :?

If you're keen to dig a bit deeper, maybe my post viewtopic.php?f=50&t=70732 may be helpful.

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TrevorH
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Re: Wifi Card/On Board Wifi Not Detected

Post by TrevorH » 2019/06/05 15:30:19

The information in this thread is unlikely to help you as the original poster has a TPLink card that has no driver in CentOS 7. That was then followed up by a post from someone who didn't read it and suggested fixing it by playing with iwlwifi which is the kernel module for Intel wireless cards and nothing at all to do with TPLink hardware.
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Peek
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Re: Wifi Card/On Board Wifi Not Detected

Post by Peek » 2019/06/05 21:50:18

Thanks for replying @TrevorH.

Apologies, as my reply's intention was more orientated at understanding the principle of drivers in Linux, than an actual fix for the user.

Linux drivers seem to confuse Windows migrators senseless. As such, be it Intel, TPLink or Realtek, how do a newb go about determining what is required to make it work ? Is it the three components as mentioned in the link, or does it totally differ for every manufacturer ?

It's the "give a man a fish" vs " give a man a fishing pole" scenario :mrgreen:

or so I ponder....

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TrevorH
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Re: Wifi Card/On Board Wifi Not Detected

Post by TrevorH » 2019/06/06 00:19:32

The general way to find out is to run lspci -nn and search for the device you're interested in. With -nn it tells you the PCI vendor/device id like say 8086:08b1 is my
01:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev 73)
So then you can search the kernel modules files for that using e.g.

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grep -i 8086 /lib/modules/$(uname -r)/modules.* | grep -i 08b1
which in this example shows lots of lines like
/lib/modules/3.10.0-957.12.2.el7.x86_64/modules.alias:alias pci:v00008086d000008B1sv*sd0000C420bc*sc*i* iwlwifi
from which you can see that the iwlwifi kernel module supports my card.
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CentOS 6 goes EOL sooner rather than later, get upgrading!
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