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After installing a bunch of updates to Ubuntu 12.04, my wireless connection stopped working. However, I found that I could access other wireless networks; I just couldn't access the one I had been using before the update. Is there any way to completely remove a wireless network and add it back in again so that it will be like a "new" wireless network and I'll be able to use it? (I tried deleting and adding it back in "Edit Connections" but this didn't work.) Or is there any other way to solve this problem?

Thanks.

Update:

I removed the network connection that was not working using the command "sudo rm /etc/NetworkManager/system-connections/name-of-connection" and then confirmed that it was removed by generating a list of all the network connections. However, that didn't work.

For "cat /etc/lsb-release; uname -a", I got DISTRIB_ID=Ubuntu DISTRIB_RELEASE=12.04 DISTRIB_CODENAME=precise DISTRIB_DESCRIPTION="Ubuntu 12.04.2 LTS" Linux Aspire4830T 3.5.0-37-generic #58~precise1-Ubuntu SMP Wed Jul 10 17:48:11 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

For "lspci -nnk | grep -iA2 net", I got 02:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR8151 v2.0 Gigabit Ethernet [1969:1083] (rev c0) Subsystem: Acer Incorporated [ALI] Device [1025:054f]

Kernel driver in use: atl1c

03:00.0 Network controller [0280]: Atheros Communications Inc. AR9287 Wireless Network Adapter (PCI-Express) [168c:002e] (rev 01) Subsystem: Foxconn International, Inc. Device [105b:e034] Kernel driver in use: ath9k

For "lsusb", I got Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 064e:d250 Suyin Corp.

For "iwconfig", I got eth0 no wireless extensions.

lo no wireless extensions.

wlan0 IEEE 802.11bgn ESSID:"ubcsecure"
Mode:Managed Frequency:2.437 GHz Access Point: A0:CF:5B:A3:DF:92
Bit Rate=117 Mb/s Tx-Power=27 dBm
Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=70/70 Signal level=-39 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:9 Invalid misc:2 Missed beacon:0

For "rfkill list all", I got 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 1: acer-wireless: Wireless LAN Soft blocked: no Hard blocked: no 2: acer-bluetooth: Bluetooth Soft blocked: yes Hard blocked: no

For "lsmod", I got Module Size Used by ath3k 12969 0 btusb 22432 0 pci_stub 12623 1 vboxpci 23237 0 vboxnetadp 25671 0 vboxnetflt 23479 0 snd_hda_codec_hdmi 32476 1 snd_hda_codec_conexant 62363 1 vboxdrv 282562 3 vboxpci,vboxnetadp,vboxnetflt coretemp 13642 0 kvm_intel 137888 0 kvm 422160 1 kvm_intel joydev 17694 0 acer_wmi 32845 0 sparse_keymap 13891 1 acer_wmi xt_hl 12522 6 ip6t_rt 12559 3 nf_conntrack_ipv6 14107 7 nf_defrag_ipv6 13413 1 nf_conntrack_ipv6 ipt_REJECT 12577 1 xt_LOG 17454 9 snd_hda_intel 34063 3 snd_hda_codec 135141 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel snd_hwdep 17765 1 snd_hda_codec xt_limit 12712 12 xt_tcpudp 12604 18 snd_pcm 97523 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec uvcvideo 78117 0 videobuf2_core 33025 1 uvcvideo videodev 125126 2 uvcvideo,videobuf2_core videobuf2_vmalloc 12861 1 uvcvideo videobuf2_memops 13405 1 videobuf2_vmalloc xt_addrtype 12714 4 xt_state 12579 14 microcode 23030 0 snd_seq_midi 13325 0 ip6table_filter 12816 1 snd_rawmidi 30750 1 snd_seq_midi ip6_tables 27686 2 ip6t_rt,ip6table_filter snd_seq_midi_event 14900 1 snd_seq_midi nf_conntrack_netbios_ns 12666 0 nf_conntrack_broadcast 12590 1 nf_conntrack_netbios_ns nf_nat_ftp 12705 0 nf_nat 25646 1 nf_nat_ftp nf_conntrack_ipv4 14531 9 nf_nat snd_seq 61931 2 snd_seq_midi,snd_seq_midi_event nf_defrag_ipv4 12730 1 nf_conntrack_ipv4 arc4 12530 2 nf_conntrack_ftp 13453 1 nf_nat_ftp nf_conntrack 83300 8 nf_conntrack_ipv6,xt_state,nf_conntrack_netbios_ns,nf_conntrack_broadcast,nf_nat_ftp,nf_nat,nf_conntrack_ipv4,nf_conntrack_ftp mei 41410 0 iptable_filter 12811 1 snd_timer 29990 2 snd_pcm,snd_seq snd_seq_device 14498 3 snd_seq_midi,snd_rawmidi,snd_seq ip_tables 27474 1 iptable_filter x_tables 29892 12 xt_hl,ip6t_rt,ipt_REJECT,xt_LOG,xt_limit,xt_tcpudp,xt_addrtype,xt_state,ip6table_filter,ip6_tables,iptable_filter,ip_tables ath9k 133095 0 psmouse 102506 0 mac80211 555272 1 ath9k ath9k_common 14054 1 ath9k ath9k_hw 399752 2 ath9k,ath9k_common ath 24124 3 ath9k,ath9k_common,ath9k_hw serio_raw 13216 0 snd 83674 16 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device lpc_ich 17145 0 cfg80211 208382 3 ath9k,mac80211,ath soundcore 15092 1 snd snd_page_alloc 18573 2 snd_hda_intel,snd_pcm rtsx_pci_ms 13181 0 memstick 16606 1 rtsx_pci_ms bnep 18240 2 parport_pc 32867 0 rfcomm 47562 0 bluetooth 211860 12 ath3k,btusb,bnep,rfcomm ppdev 17114 0 ext2 73799 1 mac_hid 13254 0 lp 17800 0 parport 46563 3 parport_pc,ppdev,lp dm_crypt 23126 1 rtsx_pci_sdmmc 17801 0 ghash_clmulni_intel 13221 0 aesni_intel 51134 26 cryptd 20531 10 ghash_clmulni_intel,aesni_intel aes_x86_64 17256 1 aesni_intel atl1c 42092 0 ahci 25869 2 libahci 27338 1 ahci i915 535221 3 drm_kms_helper 49259 1 i915 drm 290595 4 i915,drm_kms_helper rtsx_pci 33680 2 rtsx_pci_ms,rtsx_pci_sdmmc i2c_algo_bit 13565 1 i915 video 19653 2 acer_wmi,i915 wmi 19257 1 acer_wmi

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What version of Ubuntu you are using? Kubuntu, Ubuntu, Ubuntu-Gnome remix? –  Braiam Aug 3 '13 at 0:50
    
user180894 you appear to have two accounts. Please click the contact-us link at the bottom of this page to request that your accounts are merged. Once done you will be able to re-edit your question with further info. Thanks. –  fossfreedom Aug 3 '13 at 7:19

1 Answer 1

Try to remove all connection files under /etc/NetworkManager/system-connection/

Use this command:

rm -iv /etc/NetworkManager/system-connection/*
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Please open a terminal ctrl+alt+t copy and paste the following commands into it one line at a time, then edit your question to contain the results of these commands. cat /etc/lsb-release; uname -a lspci -nnk | grep -iA2 net lsusb iwconfig rfkill list all lsmod –  Wild Man Aug 4 '13 at 19:01
    
I guess you commented a wrong post –  John Denisov Aug 5 '13 at 14:07

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