Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I bought a new router this summer (ASUS RT-AC66U), but returned because it was defect and got a new one. This new one i got works on all of my devices except for my desktop, which is my only device that uses 5ghz.

I am running 12.04 (Elementary OS), and my wireless networks card is a TP-LINK TL-WDN4800 N900 (which i bought specifically for good linux support). I have wpa-psk2 and aes on the router, and in nm-connection-editor i have selected 'WPA & WPA2 personal' and someone said that aes is default in NetworkManager. When trying to connect, it takes a very long time, and after a while it asks for my password once again.

Before i updated the router to the latest verion (Which i hoped would solve the problem), 2.4ghz worked actually but not any more. When comparing the 2.4 and 5ghz networks in /etc/NetworkManager/system-connections/ they have the exact same configuration

This is the error message for 2.4ghz from dmesg

wlan0: deauthenticated from 08:60:6e:bd:c5:90 (Reason: 15)

and here's the whole log for dmesg 2.4ghz: http://pastebin.com/9qnWjAT3

And this is 5ghz

[ 3122.594511] wlan0: deauthenticating from 08:60:6e:bd:c5:90 by local choice (reason=3)

And here's the info for my wireless card

03:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network Adapter (rev 01)
Subsystem: Qualcomm Atheros Device 3112
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 4 bytes
Interrupt: pin A routed to IRQ 19
Region 0: Memory at fd8c0000 (64-bit, non-prefetchable) [size=128K]
[virtual] Expansion ROM at fdf00000 [disabled] [size=64K]
Capabilities: <access denied>
Kernel driver in use: ath9k
Kernel modules: ath9k

The wierdest thing is that it works for all of my other devices which are:

2 android phones

1 android tablet

2 linux laptops

  • system76 gazelle proffesional running 13.10

  • lenovo running 12.04 Elementary OS with a broadcom chip

Thank you in advance!

share|improve this question

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.