[CentOS] CentOS 7 does not pick up my atheros wireless

Wed Oct 1 21:54:42 UTC 2014
Akemi Yagi <amyagi at gmail.com>

On Wed, Oct 1, 2014 at 2:35 PM, Martes
<mailinglistmember at mgwigglesworth.net> wrote:
> For brevity, here is the output that you requested earlier.
>
> [@imaginationland ~]$ lspci -nn |grep -i eth
> 08:05.0 Ethernet controller [0200]: Qualcomm Atheros AR5212/AR5213 Wireless Network Adapter [168c:0013] (rev 01)
> 0b:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 09)
>
> Here is the original output.
>
> [@imaginationland ~]$ lspci |grep AR
> 08:05.0 Ethernet controller: Qualcomm Atheros AR5212/AR5213 Wireless Network Adapter (rev 01)
>
> Not really sure what the hash provides us, when investigating what version of Atheros drivers we need, however, you are correct, the output was not exactly the same.

Right, there is an important difference. That is, the 'lspci -nn'
command shows the device ID pairing. In this case it is [168c:0013]
for your atheros adapter.

If you remember, I made a *guess* early on that the driver might be
ath5k. I could have found this info easily had I known the device IDs.

Using the ID pairing 168c and 0013, I would run this command on my c7 system:

$ grep -i 168c /lib/modules/*/modules.alias | grep -i 0013
/lib/modules/3.10.0-123.8.1.el7.centos.plus.x86_64/modules.alias:alias
pci:v0000168Cd00000013sv*sd*bc*sc*i* ath5k
/lib/modules/3.16.1-1.el7.elrepo.x86_64/modules.alias:alias
pci:v0000168Cd00000013sv*sd*bc*sc*i* ath5k

This system has a CentOS kernel, CentOSPlus kernel and kernel-ml (from
ELRepo). The output shows:

(1) the device is supported by ath5k
(2) ath5k is included in the centosplus kernel and kernel-ml but NOT
in the centos distro kernel.

Hope this info helps,

Akemi