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Thread: Cannot connect to home wifi usong Network Manager (Atheros AR9485)

  1. #1
    Join Date
    Jan 2020
    Beans
    2

    Cannot connect to home wifi usong Network Manager (Atheros AR9485)

    I have acquired a laptop, an Asus Vivobook S310L, and I got Kubuntu 19.04 installed. It runs like a charm, but I have an issue with my wifi. It is simply unable to connect to my home wireless...Network manager tries to connect, but hangs when getting the address and then gives up and disconnects the network. But it can connect to the hotspot I create with my smartphone (I tried with 2 different smartphones). The laptop is equipped with an Atheros AR9485 chipset. It showed also low signal issues, which I resolved disabling the bluetooth from the BIOS. But it could never connect to my wifi.
    The strangest thing is that, under the same conditions (same place on the same desk, same Kubuntu version, Network manager version) my desktop has no problems with my wifi. The only difference is that it has a USB dongle with a Realtek chipset which has absolutely no flaws on Kubuntu.
    Here some informations:

    Code:
    lspci
    Code:
      00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)
    00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 09)
    00:04.0 Signal processing controller: Intel Corporation Haswell-ULT Thermal Subsystem (rev 09)
    00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
    00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)
    00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
    00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 1 (rev e4)
    00:1c.2 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4)
    00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4)
    00:1c.4 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 5 (rev e4)
    00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
    00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
    00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)
    00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
    00:1f.6 Signal processing controller: Intel Corporation 8 Series Thermal (rev 04)
    02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
    03:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
    04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars LE [Radeon HD 8530M / R5 M240]
    Code:
      iwconfig
    Code:
      wlp3s0    IEEE 802.11  ESSID:"D3ntin"  
              Mode:Managed  Frequency:2.437 GHz  Access Point: A4:50:46:7E:DB:C7   
              Bit Rate=14.4 Mb/s   Tx-Power=15 dBm   
              Retry short limit:7   RTS thr:off   Fragment thr:off
              Encryption key:off
              Power Management:off
              Link Quality=39/70  Signal level=-71 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:12  Invalid misc:182   Missed beacon:0
    
    enp2s0    no wireless extensions.
    
    lo        no wireless extensions.
    Code:
      rfkill list all
    Code:
      0: phy0: Wireless LAN
            Soft blocked: no
            Hard blocked: no
    Code:
      lshw -c net
    Code:
             description: Wireless interface
           product: AR9485 Wireless Network Adapter
           vendor: Qualcomm Atheros
           physical id: 0
           bus info: pci@0000:03:00.0
           logical name: wlp3s0
           version: 01
           serial: 24:0a:64:b2:14:e3
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
           configuration: broadcast=yes driver=ath9k driverversion=5.0.0-38-generic firmware=N/A ip=192.168.43.88 latency=0 link=yes multicast=yes wireless=IEEE 802.11
           resources: irq:19 memory:f7d00000-f7d7ffff memory:f7d80000-f7d8ffff
    Here the output of
    Code:
    journalctl -u NetworkManager
    I did a fresh boot, and when KDE loaded, I tried to connect to my wifi - and, abviously, it failed.

  2. #2
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    25,022
    Distro
    Ubuntu 19.10 Eoan Ermine

    Re: Cannot connect to home wifi usong Network Manager (Atheros AR9485)

    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  3. #3
    Join Date
    Jan 2020
    Beans
    2

    Re: Cannot connect to home wifi usong Network Manager (Atheros AR9485)

    It was exactly what chili555 said: one of the two antennas disconnected. Now it works like a charm, even with bluetooth enabled...thanks (again )!

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