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fedora25 Realtek rtl8821usb wifi au driver help?

asked 2017-02-09 01:47:02 -0500

nulinuxfan gravatar image

Hello, I'm excited to be using Linux for the first time yet struggling here and there. After setting up a dual boot with Win 7 Pro, downloading and loading fedora25, and looking on line for tips, I have successfully updated, enabled the RPM Fusion repositories, installed Fedy, and added SimpleScreenRecorder. As only a Windows user thus far, all of this is exciting ...BUT really new to me. Things that may take most of you minutes are taking me days ...I'm very weak at this but I'm learning. All seems to be going well aside from being able to use this Realtek RTL8821AU usb wifi product. It's working fine and connected in the Windows 7 boot but I haven't been able to get fedora to use or recognize it. I'm connected with cable on the computer at the moment but to locate the computer permanently I need the wifi. Before asking here, I have read, searched, and tried some commands without any success. The device came with a small CD that Linux is reading and I can look through the documents, etc. while in Linux and some are PDF and some show up as "boxes". From what I gather there are two approaches: 1) download/read/or execute the driver(s) or 2) perform a long and complex (to me) list of codes and programming. I feel I can do 1) but not likely to do 2) successfully. A) Can you direct me to help with this driver challenge? or B) Recommend a different wifi usb device which works effortlessly with fedora25. The Realtek device (EP-AC1607) I have is a 600 Mbps 2dBi Dual Band 2.4G/5G adapter and maybe you all might guide me to one that's faster than this and is easier to use with fedora25. Thanks very much your assistance. :) --nulinuxfan

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Can you open a terminal window and provide the output for the following commands.

 # sudo lspci | grep -i realtek

 # ip link

 # nmcli con show
thatguyscool gravatar imagethatguyscool ( 2017-02-09 21:32:44 -0500 )edit

Thanks thatguyscool, I didn't see your comment until now. I will try those commands and should be able to provide the output(s) here. 1) I don't know how to make that "line" symbol between "1spci" and "grep". ...I'll search about the symbol on the internet in the meantime. 2) I should be inputting each line one at a time correct?

nulinuxfan gravatar imagenulinuxfan ( 2017-02-10 18:54:35 -0500 )edit

I found how to make the line. I typed different variations of those commands but didn't get "outputs" Here's what ocurred: (as you can see I haven't been able to set the hostname and not sure how that affects anything.)

[Aaron@new-name ~]$ #sudo 1spci | grep -i realtek

[Aaron@new-name ~]$ sudo 1spci | grep -i realtek

sudo: 1spci: command not found

[Aaron@new-name ~]$ # sudo 1spci | grep -i realtek

[Aaron@new-name ~]$ # ip link

[Aaron@new-name ~]$ # nmcli con show

[Aaron@new-name ~]$

nulinuxfan gravatar imagenulinuxfan ( 2017-02-10 19:25:08 -0500 )edit

here are the outputs for the two commands I got to respond: [Aaron@Gold-n-Things ~]$ nmcli con show NAME UUID TYPE DEVICE enp3s0 8317b9cd-60be-3f3d-b9b7-5f3d7254183d 802-3-ethernet enp3s0

[Aaron@Gold-n-Things ~]$ ip link 1: lo: <loopback,up,lower_up> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: enp3s0: <broadcast,multicast,up,lower_up> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether 00:19:21:29:78:3b brd ff:ff:ff:ff:f

nulinuxfan gravatar imagenulinuxfan ( 2017-02-11 04:54:38 -0500 )edit

just a heads-up, it's lpci (with lower case L) not 1pci

arya s. gravatar imagearya s. ( 2017-02-11 15:54:41 -0500 )edit

2 Answers

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answered 2017-02-15 22:47:11 -0500

nulinuxfan gravatar image

After much time and some tinkering with basic commands, I was not able to do the coding/programming to get this Realtek RTL8821AU recognized on fedora 25. Yet, I have GREAT news! the Panda Wireless PAU09 N600 dual band usb adapter (from Amazon $25 including 2 day shipping) worked ...PLUG & PLAY PERFECTLY. Didn't even need to put the included CD in the machine. Plugged it in (after boot up) and BINGO entered the wifi password and connected. What a relief. Hope this might help some with the same issue. Thanks for being here for support Ask Fedora! Hey, ...send me some votes. Cheers.

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answered 2017-02-14 20:02:56 -0500

florian gravatar image

updated 2017-02-14 20:06:09 -0500

Those questions may be relevant for your problem:


Here is a bug report that may be covering your problem:

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Thank you for the help florian. I had looked at 3 of those 4 links. One comment looked interesting: ..."Alexander Korsunsky 2017-02-10 07:59:50 EST

Note that upgrading the Kernel to a pre-release version of 4.10 fixes the problem:

dnf config-manager --add-repo=
dnf update kernel

Also, I have since ordered a different usb wifi adapter: Panda PAU09 N600 which I will try tomorrow after receiving it. Thanks again for your input. Much of this is new to me. Take care.

nulinuxfan gravatar imagenulinuxfan ( 2017-02-14 21:55:49 -0500 )edit

Installing the 4.10 kernel is definitely a solution - though it may break the system elsewhere since it hasn't been widely tested. I prefer running an older kernel (4.8.16) to avoid the current Realtek wifi problem.

I had also tested the solution described in comment 20 of the same bug report - it worked but wifi was very very slow. so back to 4.8.16...

florian gravatar imageflorian ( 2017-02-15 09:26:42 -0500 )edit

Thanks for the help thatguyscool, arya s., and florian! I appreciate your input and help. *Please add "up-votes" if you don't mind so I can get my TEN needed before I can vote on things guys. Great news the Panda Wireless PAU09 N600 dual band usb adapter worked PLUG & PLAY. Didn't even need to put the included CD in the machine. Plugged it in (after boot up) and BINGO entered the wifi password and connected. What a relief. Now I can move the computer (desktop) where I need it. I'll add this outcome to my answer and to my other post. Take care out there and thanks again!

nulinuxfan gravatar imagenulinuxfan ( 2017-02-15 22:39:04 -0500 )edit

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Asked: 2017-02-09 01:47:02 -0500

Seen: 3,132 times

Last updated: Feb 14 '17