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Thread: Wireless connectivity disappeared. can't bring it back

  1. #1
    Join Date
    Apr 2014
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    12

    Wireless connectivity disappeared. can't bring it back

    I have Ubuntu 14.04 LTS (64-bit), which I installed on April 19, and I daily checked "Software Updater". However on April 24 my laptop no longer sees the wireless network (or the neighbors' wireless networks), nor does it even recognize the ethernet cable if I plug that in. "Network Connections" clearly shows the our wireless and the correct password for it, but the laptop is not "seeing" it.


    Below I paste the output of lspci and ifconfig:

    lspci
    00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Root Complex
    00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD 8210]
    00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 9840
    00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
    00:02.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
    00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
    00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 01)
    00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode]
    00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
    00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
    00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
    00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
    00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 3a)
    00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 02)
    00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
    00:14.7 SD Host controller: Advanced Micro Devices, Inc. [AMD] FCH SD Flash Controller (rev 01)
    00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
    00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 1
    00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 2
    00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 3
    00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 4
    00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 5
    01:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
    02:00.0 Ethernet controller: Qualcomm Atheros QCA8171 Gigabit Ethernet (rev 10)
    dada@dada-Aspire-V5-123:~$ ifconfig
    lo Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    inet6 addr: ::1/128 Scope:Host
    UP LOOPBACK RUNNING MTU:65536 Metric:1
    RX packets:482 errors:0 dropped:0 overruns:0 frame:0
    TX packets:482 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:47435 (47.4 KB) TX bytes:47435 (47.4 KB)

  2. #2
    Join Date
    Apr 2014
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    5

    Re: Wireless connectivity disappeared. can't bring it back

    Hi there!

    Have you tried searching in the forums for similar problems?
    This one is quite recent: http://ubuntuforums.org/showthread.php?t=2220454
    maybe the solution works out for you too.

  3. #3
    Join Date
    Apr 2014
    Beans
    12

    Re: Wireless connectivity disappeared. can't bring it back

    Thanks, but tried these solutions, but neither the ethernet cable nor wireless are working still.


    Quote Originally Posted by nrd2 View Post
    Hi there!

    Have you tried searching in the forums for similar problems?
    This one is quite recent: http://ubuntuforums.org/showthread.php?t=2220454
    maybe the solution works out for you too.

  4. #4
    Join Date
    Apr 2014
    Beans
    5

    Re: Wireless connectivity disappeared. can't bring it back

    Quote Originally Posted by Dada_Maheshvaranan View Post
    Thanks, but tried these solutions, but neither the ethernet cable nor wireless are working still.
    hum... just to make sure, you do have your wireless on, right? I mean, a physical switch on your laptop?
    Can you also paste here the output of 'lsmod'?

  5. #5
    Join Date
    Apr 2014
    Beans
    12

    Re: Wireless connectivity disappeared. can't bring it back

    Thanks for your help. No physical wireless switch on the laptop.

    dada@dada-Aspire-V5-123:~$ lsmod
    Module Size Used by
    nls_iso8859_1 12713 0
    joydev 17381 0
    rfcomm 69160 8
    bnep 19624 2
    hid_generic 12548 0
    acer_wmi 32522 0
    sparse_keymap 13948 1 acer_wmi
    snd_hda_codec_realtek 61438 1
    snd_hda_codec_hdmi 46207 1
    amd_freq_sensitivity 12589 0
    kvm 451511 0
    crct10dif_pclmul 14289 0
    crc32_pclmul 13113 0
    ghash_clmulni_intel 13259 0
    aesni_intel 55624 0
    aes_x86_64 17131 1 aesni_intel
    lrw 13286 1 aesni_intel
    gf128mul 14951 1 lrw
    glue_helper 13990 1 aesni_intel
    ablk_helper 13597 1 aesni_intel
    cryptd 20359 3 ghash_clmulni_intel,aesni_intel,ablk_helper
    usbhid 52616 0
    arc4 12608 2
    psmouse 102222 0
    serio_raw 13462 0
    ath9k 164164 0
    uvcvideo 80885 0
    usb_storage 62209 0
    hid 106148 2 hid_generic,usbhid
    snd_seq_midi 13324 0
    snd_seq_midi_event 14899 1 snd_seq_midi
    snd_hda_intel 52355 5
    ath9k_common 13551 1 ath9k
    videobuf2_vmalloc 13216 1 uvcvideo
    snd_rawmidi 30144 1 snd_seq_midi
    videobuf2_memops 13362 1 videobuf2_vmalloc
    ath9k_hw 453856 2 ath9k_common,ath9k
    videobuf2_core 40664 1 uvcvideo
    k10temp 13126 0
    snd_hda_codec 192906 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_i ntel
    snd_hwdep 13602 1 snd_hda_codec
    fam15h_power 13119 0
    edac_core 62291 0
    videodev 134688 2 uvcvideo,videobuf2_core
    ath 28698 3 ath9k_common,ath9k,ath9k_hw
    snd_pcm 102099 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
    edac_mce_amd 22617 0
    snd_seq 61560 2 snd_seq_midi_event,snd_seq_midi
    snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
    btusb 32412 0
    mac80211 626489 1 ath9k
    bluetooth 395423 22 bnep,btusb,rfcomm
    i2c_piix4 22155 0
    snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
    snd_timer 29482 2 snd_pcm,snd_seq
    snd 69238 21 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_ codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_cod ec,snd_hda_intel,snd_seq_device,snd_seq_midi
    radeon 1514165 4
    cfg80211 484040 3 ath,ath9k,mac80211
    ttm 85115 1 radeon
    drm_kms_helper 52758 1 radeon
    drm 302817 6 ttm,drm_kms_helper,radeon
    soundcore 12680 1 snd
    i2c_algo_bit 13413 1 radeon
    wmi 19177 1 acer_wmi
    parport_pc 32701 0
    ppdev 17671 0
    lp 17759 0
    video 19476 1 acer_wmi
    parport 42348 3 lp,ppdev,parport_pc
    mac_hid 13205 0
    sdhci_pci 23172 0
    sdhci 43015 1 sdhci_pci
    ahci 25819 2
    libahci 32168 1 ahci
    alx 32452 0
    mdio 13807 1 alx

  6. #6
    Join Date
    Apr 2014
    Beans
    5

    Re: Wireless connectivity disappeared. can't bring it back

    Strange, everything seems ok.
    If you boot with the LiveCD again, do you have connectivity?

  7. #7
    Join Date
    Apr 2014
    Beans
    12

    Re: Wireless connectivity disappeared. can't bring it back

    I rebooted with the LiveCD, and even before choosing "Try Ubuntu" I was informed there was a wireless network to connect to, and it worked perfectly. I shut down, restarted from the harddrive, and, alas, no wireless. Is the only solution then reinstalling Ubuntu (several hours of work copying over all my files again)?

  8. #8
    Join Date
    Jan 2010
    Beans
    38

    Re: Wireless connectivity disappeared. can't bring it back

    Try booting into your bios, choose restore defaults and then boot into the OS...that worked when my wireless went MIA.

  9. #9
    Join Date
    Apr 2014
    Beans
    5

    Re: Wireless connectivity disappeared. can't bring it back

    Quote Originally Posted by Dada_Maheshvaranan View Post
    I rebooted with the LiveCD, and even before choosing "Try Ubuntu" I was informed there was a wireless network to connect to, and it worked perfectly. I shut down, restarted from the harddrive, and, alas, no wireless. Is the only solution then reinstalling Ubuntu (several hours of work copying over all my files again)?
    can you boot with the livecd and post here the lspci and lsmod output, maybe we can spot some differences and understand what is missing... reinstalling is a pain :/

  10. #10
    Join Date
    Apr 2014
    Beans
    12

    Re: Wireless connectivity disappeared. can't bring it back

    Quote Originally Posted by nrd2 View Post
    can you boot with the livecd and post here the lspci and lsmod output, maybe we can spot some differences and understand what is missing... reinstalling is a pain :/
    Thanks. I booted with the Ubuntu StartupCD, chose Try Ubuntu, opened terminal, and here are the outputs:

    ubuntu@ubuntu:~$ lspci
    00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Root Complex
    00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD 8210]
    00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 9840
    00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
    00:02.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
    00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
    00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 01)
    00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode]
    00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
    00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
    00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
    00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
    00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 3a)
    00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 02)
    00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
    00:14.7 SD Host controller: Advanced Micro Devices, Inc. [AMD] FCH SD Flash Controller (rev 01)
    00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
    00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 1
    00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 2
    00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 3
    00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 4
    00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 5
    01:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
    02:00.0 Ethernet controller: Qualcomm Atheros QCA8171 Gigabit Ethernet (rev 10)
    ubuntu@ubuntu:~$ lsmod
    Module Size Used by
    ctr 13049 1
    ccm 17773 1
    amd_freq_sensitivity 12589 0
    arc4 12608 2
    kvm 451511 0
    ath9k 164164 0
    dm_crypt 23177 0
    ath9k_common 13551 1 ath9k
    crct10dif_pclmul 14289 0
    crc32_pclmul 13113 0
    ath9k_hw 453856 2 ath9k_common,ath9k
    acer_wmi 32522 0
    uvcvideo 80885 0
    ghash_clmulni_intel 13259 0
    joydev 17381 0
    videobuf2_vmalloc 13216 1 uvcvideo
    aesni_intel 55624 2
    sparse_keymap 13948 1 acer_wmi
    snd_hda_codec_realtek 61438 1
    videobuf2_memops 13362 1 videobuf2_vmalloc
    aes_x86_64 17131 1 aesni_intel
    lrw 13286 1 aesni_intel
    videobuf2_core 40664 1 uvcvideo
    dm_multipath 22873 0
    snd_hda_codec_hdmi 46207 1
    videodev 134688 2 uvcvideo,videobuf2_core
    gf128mul 14951 1 lrw
    ath 28698 3 ath9k_common,ath9k,ath9k_hw
    snd_hda_intel 52355 5
    glue_helper 13990 1 aesni_intel
    scsi_dh 14882 1 dm_multipath
    mac80211 626489 1 ath9k
    ablk_helper 13597 1 aesni_intel
    snd_hda_codec 192906 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_i ntel
    psmouse 102222 0
    cryptd 20359 3 ghash_clmulni_intel,aesni_intel,ablk_helper
    snd_hwdep 13602 1 snd_hda_codec
    snd_pcm 102099 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
    snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
    snd_seq_midi 13324 0
    serio_raw 13462 0
    snd_seq_midi_event 14899 1 snd_seq_midi
    snd_rawmidi 30144 1 snd_seq_midi
    snd_seq 61560 2 snd_seq_midi_event,snd_seq_midi
    cfg80211 484040 3 ath,ath9k,mac80211
    btusb 32412 0
    snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
    fam15h_power 13119 0
    edac_core 62291 0
    snd_timer 29482 2 snd_pcm,snd_seq
    k10temp 13126 0
    edac_mce_amd 22617 0
    i2c_piix4 22155 0
    bnep 19624 2
    snd 69238 21 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_ codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_cod ec,snd_hda_intel,snd_seq_device,snd_seq_midi
    rfcomm 69160 8
    soundcore 12680 1 snd
    bluetooth 395423 22 bnep,btusb,rfcomm
    mac_hid 13205 0
    parport_pc 32701 0
    ppdev 17671 0
    lp 17759 0
    parport 42348 3 lp,ppdev,parport_pc
    squashfs 48362 1
    overlayfs 27916 1
    nls_utf8 12557 1
    isofs 39835 1
    dm_mirror 22135 0
    dm_region_hash 20862 1 dm_mirror
    dm_log 18411 2 dm_region_hash,dm_mirror
    hid_generic 12548 0
    usbhid 52616 0
    hid 106148 2 hid_generic,usbhid
    usb_storage 62209 1
    sdhci_pci 23172 0
    radeon 1514165 3
    sdhci 43015 1 sdhci_pci
    ahci 25819 1
    libahci 32168 1 ahci
    alx 32452 0
    mdio 13807 1 alx
    wmi 19177 1 acer_wmi
    i2c_algo_bit 13413 1 radeon
    ttm 85115 1 radeon
    drm_kms_helper 52758 1 radeon
    drm 302817 5 ttm,drm_kms_helper,radeon
    video 19476 1 acer_wmi

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