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Old 07-23-2015, 07:36 AM   #1
jvermeulen
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Centos7: wireless usb connection shows up as wired.


Hello All,

I have a Sitecom wifi usb adapter AC1200 that I would like to use on
a Lenovo B580 laptop.
The laptop has a new Centos7.1 install. But I think the problem may not be
distro-specific.

When inserting the usb it is recognised:
[jvermeulen@smartboys sitecom-ac1200]$ sudo dmesg | tail -n15

[19922.767413] usb 2-3: new high-speed USB device number 5 using ehci-pci
[19922.882377] usb 2-3: New USB device found, idVendor=0df6, idProduct=0074
[19922.882389] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[19922.882396] usb 2-3: Product: 802.11n NIC
[19922.882403] usb 2-3: Manufacturer: Sitecom Europe BV
[19922.882409] usb 2-3: SerialNumber: 123456

I have found a driver on github for the device ( I think ):
https://github.com/gnab/rtl8812au
It installs ok, so I end up with a file:
/usr/lib/modules/3.10.0-229.7.2.el7.x86_64/kernel/drivers/net/wireless/8812au.ko

So far all goes well I think.....but:

Then a new connection appears in NetworkManager:
Cabled network ( Sitecom Europe BV 802.11n NIC )
Auto ethernet

So NetworkManager sees it as a wired connection.

Is there a way to change this?

Many thanks, Johan
 
Old 07-23-2015, 11:33 AM   #2
trentfox
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I'm no expert and I apologize in advance if this is trivial advice, but I wonder if it would be possible to either edit the connection in network manager connection settings to change it from wired to wireless or if not, to copy the settings from the wired connection into a new wireless connection? If you delete the connection altogether from network manager settings and restart the computer, is your adapter visible as a wireless connection?
 
Old 07-23-2015, 02:38 PM   #3
jefro
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"802.11n" It knows it is a wireless.

I suspect that because 7 is starting to use somewhat like the way BSD does that it is confusing you. (maybe me)

https://docs.oracle.com/cd/E52668_01/E54669/E54669.pdf

nm-connection-editor

What does ip or ifconfig report while you are reading that manual?

Last edited by jefro; 07-23-2015 at 02:41 PM.
 
Old 07-24-2015, 07:01 AM   #4
jvermeulen
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Hello jefro and trendfox,

thanks for the replies.

Deleting the connection and rebooting changes nothing.

Deleting and adding a new wireless connection in NetworkManager seems the logical thing to do.
But what I see on a " normal " machine, is
section Ethernet : em1 and Auto Ethernet. Looks to me like a device ( em1) and his connection.
section Wireless : an entry for every connection I ever made, but no device.

/etc/sysconfig/network-scripts/ shows the same on a normal machine: it has an entry for the wired device but not for
the wireless interface.

So how can I ad a wireless device, in this case the usb stick, if NetworkManager doesn't see it?

The Oracle pdf section 11 explains about wired devices, but I see nothing on wireless at first view. I haven't read it entirely.

ip addr:

[caw@localhost ~]$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 3c:97:0e:44:13:3e brd ff:ff:ff:ff:ff:ff
inet 192.168.66.178/25 brd 192.168.66.255 scope global dynamic enp2s0
valid_lft 561sec preferred_lft 561sec
inet6 fe80::3e97:eff:fe44:133e/64 scope link
valid_lft forever preferred_lft forever
3: enp0s20u3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000
link/ether 64:d1:a3:18:fe:17 brd ff:ff:ff:ff:ff:ff


where enp0s20u3 is the usb interface I think.

Greetings, Johan
 
Old 07-24-2015, 02:45 PM   #5
jefro
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enp0s20u3 Yes it should be. Stupid naming convention that we will all have to learn soon. Supposed to make it easier.

You have to now control it to connect it.
 
Old 07-28-2015, 04:53 AM   #6
jvermeulen
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Hello,

I guess I have to call it a day.
I cannot find where NetworkManager configures that this is a wired and not a wireless device.
The best I can think of, is that it's the wrong driver. In that case I'm not going to look for
the right one at the moment.
Not so big a deal, but shame on Lenovo, for the device:id pair protection.
Why, Lenovo?

Greetings, Johan
 
Old 07-29-2015, 04:38 PM   #7
jefro
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Might try a similar distro like Fedora\Oracle\Scientific and see how it shows up.

Any luck going though the links I posted?
 
  


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