Ubuntu – Ubuntu 14.04 : My computer sees the wireless network, but won’t connect to it, keeps asking for the WPA password


Sony Vaio VGN-NW240F
Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) (rev 01)

$ lspci -vv -s
Subsystem: Foxconn International, Inc. T77H126.00 802.11bgn Wireless Half-size Mini PCIe Card
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: 64 bytes
Interrupt: pin A routed to IRQ 17
Region 0: Memory at d2500000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: ath9k

$ modinfo ath9k
filename:       /lib/modules/3.13.0-24-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko
license:        Dual BSD/GPL
description:    Support for Atheros 802.11n wireless LAN cards.
author:         Atheros Communications
srcversion:     BAF225EEB618908380B28DA
alias:          platform:qca955x_wmac
alias:          platform:ar934x_wmac
alias:          platform:ar933x_wmac
alias:          platform:ath9k
alias:          pci:v0000168Cd00000036sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000185Fsd00003027bc*sc*i*
depends:        ath9k_hw,mac80211,ath9k_common,cfg80211,ath
intree:         Y
vermagic:       3.13.0-24-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        00:A5:A6:57:59:DE:47:4B:C5:C4:31:20:88:0C:1B:94:A5:39:F4:31
sig_hashalgo:   sha512
parm:           debug:Debugging mask (uint)
parm:           nohwcrypt:Disable hardware encryption (int)
parm:           blink:Enable LED blink on activity (int)
parm:           btcoex_enable:Enable wifi-BT coexistence (int)
parm:           bt_ant_diversity:Enable WLAN/BT RX antenna diversity (int)
parm:           ps_enable:Enable WLAN PowerSave (int)

My network works perfectly well with this computer on windows 7, and with various other computers and devices. I installed Ubuntu 14.04 today, and it works perfectly, except for the wifi.

When I try to connect (wifi icon, name_of_network), a popup asking for the password keeps appearing every minute or so, and it does not connect. The password is correct.

I tried to delete the network from the connection list (wifi icon, edit connections), restart my computer and try again, to no avail.

Ethernet works perfectly.

I have to assume that it is related to Ubuntu, since the wireless card is recognized and can scan the different networks available.

$ rfkill list
0: sony-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

I do not know Ubuntu 14.04 well enough to even try anything.

Any suggestions?

Best Answer

So, my issue was fixed. I'm not extremely sure how, but here is what I did:

sudo service network-manager restart

Maybe that will help others who have this problem, if that was the solution of course.

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