[Solved] Unable to connect to wireless device

Kemikal · 2016-01-23 15:08:48

The device I have is a T-LINK TL-WN823N wifi dongle.

This device worked out of the box with the rtl8291cu driver included in the kernel.

However, it would disconnect every 1-5 minutes, and I would have to disconnect it and reconnect it.

The wiki (https://wiki.archlinux.org/index.php/Wi … #rtl8192cu) suggests that I try the AUR package for the driver. https://aur.archlinux.org/packages/8192cu-dkms/

I installed the AUR package and it worked.

However, now I have upgraded from linux 4-3.3.2 to linux 4-3.3.3, it doesn't work any more.

Some sanity checks:

$ pacman -Qi linux

Name           : linux
Version        : 4.3.3-3
Description    : The Linux kernel and modules
Architecture   : x86_64
URL            : http://www.kernel.org/
Licences       : GPL2
Groups         : base
Provides       : None
Depends On     : coreutils  linux-firmware  kmod  mkinitcpio>=0.7
Optional Deps  : crda: to set the correct wireless channels of your country
Required By    : None
Optional For   : None
Conflicts With : None
Replaces       : None
Installed Size :  74.11 MiB
Packager       : Tobias Powalowski <tpowa@archlinux.org>
Build Date     : Wed 20 Jan 2016 07:13:40 UTC
Install Date   : Wed 20 Jan 2016 22:05:43 UTC
Install Reason : Explicitly installed
Install Script : Yes
Validated By   : Signature

$ uname -a

Linux jackshannon 4.3.3-3-ARCH #1 SMP PREEMPT Wed Jan 20 08:12:23 CET 2016 x86_64 GNU/Linux

It doesn't seem to appear here:

$ lspci -nn

00:00.0 Host bridge [0600]: Intel Corporation 4th Gen Core Processor DRAM Controller [8086:0c00] (rev 06)
00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06)
00:03.0 Audio device [0403]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller [8086:0c0c] (rev 06)
00:14.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI [8086:8c31] (rev 05)
00:16.0 Communication controller [0780]: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 [8086:8c3a] (rev 04)
00:1a.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 [8086:8c2d] (rev 05)
00:1b.0 Audio device [0403]: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller [8086:8c20] (rev 05)
00:1c.0 PCI bridge [0604]: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 [8086:8c10] (rev d5)
00:1c.2 PCI bridge [0604]: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 [8086:8c14] (rev d5)
00:1c.3 PCI bridge [0604]: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 [8086:8c16] (rev d5)
00:1d.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 [8086:8c26] (rev 05)
00:1f.0 ISA bridge [0601]: Intel Corporation C220 Series Chipset Family H81 Express LPC Controller [8086:8c5c] (rev 05)
00:1f.2 SATA controller [0106]: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] [8086:8c02] (rev 05)
00:1f.3 SMBus [0c05]: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller [8086:8c22] (rev 05)
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
03:00.0 USB controller [0c03]: VIA Technologies, Inc. VL805 USB 3.0 Host Controller [1106:3483] (rev 01)

It is enp0s20u5:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 40:8d:5c:7e:0e:9e brd ff:ff:ff:ff:ff:ff
3: enp0s20u5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 60:e3:27:17:90:77 brd ff:ff:ff:ff:ff:ff

I see that the state is DOWN, so I tried to make it UP:

$ sudo ip link set enp0s20u5 up

(This returned no output)

$ iw dev

(This returned no output)

What do I need to do to make it work?

Last edited by Kemikal (2016-01-24 17:05:25)

krork · 2016-01-23 20:15:14

Silly question, but have you tried recompiling and reinstalling the AUR package after the kernel upgrade? Edit: And rebooting?

Last edited by krork (2016-01-23 20:15:47)

Kemikal · 2016-01-23 20:49:02

Hi krork, thanks for the response! Yes I have and still no luck.

I've been able to uninstall, and use the driver included in the kernel again (with the connection dropping every 2-5 minutes).

Then delete and re-clone and run makepkg -sri to rebuild and install the AUR package. Same situation.

Please let me know if there is any more information I need to provide to help diagnose!

Edit: And rebooting

Last edited by Kemikal (2016-01-23 20:56:39)

krork · 2016-01-23 21:38:45

What kernel module do you need for it? Maybe that was loaded automatically in the old kernel version, but now isn't anymore. lsmod lists your current modules (but won't help you much if it isn't loaded, of course..), modprobe loads a new one, but I guess you know the commands

Kemikal · 2016-01-23 22:12:35

The module to load is 8192cu and it's loaded (and there when I lsmod), I've tried unloading and loading, no luck.

Kemikal · 2016-01-24 02:31:49

Update: so I installed https://github.com/pvaret/rtl8192cu-fixes and it works!

jasonwryan · 2016-01-24 02:35:35

Please remember to mark your thread as [Solved] by editing your first post and prepending it to the title.

Arch Linux

#1 2016-01-23 15:08:48

[Solved] Unable to connect to wireless device

#2 2016-01-23 20:15:14

Re: [Solved] Unable to connect to wireless device

#3 2016-01-23 20:49:02

Re: [Solved] Unable to connect to wireless device

#4 2016-01-23 21:38:45

Re: [Solved] Unable to connect to wireless device

#5 2016-01-23 22:12:35

Re: [Solved] Unable to connect to wireless device

#6 2016-01-24 02:31:49

Re: [Solved] Unable to connect to wireless device

#7 2016-01-24 02:35:35

Re: [Solved] Unable to connect to wireless device

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