1

Following is the result of wireless-info script:

########## wireless info START ##########

Report from: 31 May 2018 12:21 IST +0530

Booted last: 31 May 2018 00:00 IST +0530

Script from: 10 Jan 2018 20:04 UTC +0000

##### release ###########################

Distributor ID: Ubuntu
Description:    Ubuntu 16.04.4 LTS
Release:    16.04
Codename:   xenial

##### kernel ############################

Linux 4.4.0-127-generic #153-Ubuntu SMP Sat May 19 10:58:46 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash, vt.handoff=7

##### desktop ###########################

Ubuntu

##### lspci #############################

00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (2) I219-V [8086:15b8] (rev 31)
    Subsystem: ASUSTeK Computer Inc. Ethernet Connection (2) I219-V [1043:8672]
    Kernel driver in use: e1000e

02:00.0 Ethernet controller [0200]: Qualcomm Atheros Device [168c:abcd] (rev 01)
    Subsystem: Fujitsu Limited. Device [10cf:16a8]

03:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller [1b21:1242]

##### lsusb #############################

Bus 006 Device 002: ID 2109:0812 VIA Labs, Inc. VL812 Hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 004: ID 03f0:2f4a Hewlett-Packard 
Bus 005 Device 003: ID 03f0:094a Hewlett-Packard Optical Mouse [672662-001]
Bus 005 Device 002: ID 2109:2812 VIA Labs, Inc. VL812 Hub
Bus 005 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 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

##### PCMCIA card info ##################

##### rfkill ############################

##### lsmod #############################

eeepc_wmi              16384  0
asus_wmi               28672  1 eeepc_wmi
sparse_keymap          16384  1 asus_wmi
ath9k                 147456  0
ath9k_common           36864  1 ath9k
ath9k_hw              479232  2 ath9k_common,ath9k
ath                    32768  3 ath9k_common,ath9k,ath9k_hw
mac80211              737280  1 ath9k
cfg80211              565248  4 ath,ath9k_common,ath9k,mac80211
mxm_wmi                16384  0
wmi                    20480  2 mxm_wmi,asus_wmi
video                  40960  2 i915_bpo,asus_wmi

##### interfaces ########################

[/etc/network/interfaces]
auto lo
iface lo inet loopback

##### ifconfig ##########################

enp0s31f6 Link encap:Ethernet  HWaddr   
          inet addr:192.168.0.105  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::e15c:7462:4f65:e036/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3674 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2847 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:3883593 (3.8 MB)  TX bytes:367643 (367.6 KB)
          Interrupt:16 Memory:f7300000-f7320000 

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:497 errors:0 dropped:0 overruns:0 frame:0
          TX packets:497 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:43961 (43.9 KB)  TX bytes:43961 (43.9 KB)

##### iwconfig ##########################

lo        no wireless extensions.

enp0s31f6  no wireless extensions.

##### route #############################

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 enp0s31f6
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 enp0s31f6
192.168.0.0     0.0.0.0         255.255.255.0   U     100    0        0 enp0s31f6

##### resolv.conf #######################

nameserver 127.0.1.1

##### network managers ##################

Installed:

    NetworkManager

Running:

root       816     1  0 11:51 ?        00:00:00 /usr/sbin/NetworkManager --no-daemon

##### NetworkManager info ###############

GENERAL.DEVICE:                         enp0s31f6
GENERAL.TYPE:                           ethernet
GENERAL.NM-TYPE:                        NMDeviceEthernet
GENERAL.VENDOR:                         Intel Corporation
GENERAL.PRODUCT:                        Ethernet Connection (2) I219-V
GENERAL.DRIVER:                         e1000e
GENERAL.DRIVER-VERSION:                 3.2.6-k
GENERAL.FIRMWARE-VERSION:               0.8-4
GENERAL.HWADDR:                         
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.REASON:                         0 (No reason given)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:1f.6/net/enp0s31f6
GENERAL.IP-IFACE:                       enp0s31f6
GENERAL.IS-SOFTWARE:                    no
GENERAL.NM-MANAGED:                     yes
GENERAL.AUTOCONNECT:                    yes
GENERAL.FIRMWARE-MISSING:               no
GENERAL.NM-PLUGIN-MISSING:              no
GENERAL.PHYS-PORT-ID:                   --
GENERAL.CONNECTION:                     Ethernet connection 1
GENERAL.CON-UUID:                       bd5b5fc1-d82f-46f4-8b70-124c1c679b20
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/1
GENERAL.METERED:                        no (guessed)
CAPABILITIES.CARRIER-DETECT:            yes
CAPABILITIES.SPEED:                     100 Mb/s
CAPABILITIES.IS-SOFTWARE:               no
WIRED-PROPERTIES.CARRIER:               on
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{0}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]:   bd5b5fc1-d82f-46f4-8b70-124c1c679b20 | Ethernet connection 1
IP4.ADDRESS[1]:                         192.168.0.105/24
IP4.GATEWAY:                            192.168.0.1
IP4.ROUTE[1]:                           dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]:                             192.168.0.1
DHCP4.OPTION[1]:                        requested_routers = 1
DHCP4.OPTION[2]:                        requested_domain_search = 1
DHCP4.OPTION[3]:                        requested_time_offset = 1
DHCP4.OPTION[4]:                        requested_domain_name = 1
DHCP4.OPTION[5]:                        requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]:                        requested_broadcast_address = 1
DHCP4.OPTION[7]:                        requested_netbios_scope = 1
DHCP4.OPTION[8]:                        requested_wpad = 1
DHCP4.OPTION[9]:                        next_server = 0.0.0.0
DHCP4.OPTION[10]:                       expiry = 1527755965
DHCP4.OPTION[11]:                       requested_interface_mtu = 1
DHCP4.OPTION[12]:                       requested_subnet_mask = 1
DHCP4.OPTION[13]:                       dhcp_lease_time = 7200
DHCP4.OPTION[14]:                       dhcp_message_type = 5
DHCP4.OPTION[15]:                       ip_address = 192.168.0.105
DHCP4.OPTION[16]:                       requested_static_routes = 1
DHCP4.OPTION[17]:                       requested_domain_name_servers = 1
DHCP4.OPTION[18]:                       routers = 192.168.0.1
DHCP4.OPTION[19]:                       broadcast_address = 192.168.0.255
DHCP4.OPTION[20]:                       requested_ntp_servers = 1
DHCP4.OPTION[21]:                       requested_netbios_name_servers = 1
DHCP4.OPTION[22]:                       domain_name_servers = 192.168.0.1 0.0.0.0
DHCP4.OPTION[23]:                       requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]:                       subnet_mask = 255.255.255.0
DHCP4.OPTION[25]:                       network_number = 192.168.0.0
DHCP4.OPTION[26]:                       requested_host_name = 1
DHCP4.OPTION[27]:                       dhcp_server_identifier = 192.168.0.1
IP6.ADDRESS[1]:                         fe80::e15c:7462:4f65:e036/64
IP6.GATEWAY:                            

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

##### NetworkManager profiles ###########

##### Netplan config ####################

##### iw reg get ########################

Region: Asia/Kolkata (based on set time zone)

country 00: DFS-UNSET
    (2402 - 2472 @ 40), (N/A, 20), (N/A)
    (2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
    (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
    (5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
    (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR
    (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR
    (5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
    (57240 - 63720 @ 2160), (N/A, 0), (N/A)

##### iwlist channels ###################

lo        no frequency information.

enp0s31f6  no frequency information.

##### iwlist scan #######################

lo        Interface doesn't support scanning.

enp0s31f6  Interface doesn't support scanning.

##### module infos ######################

[ath9k]
filename:       /lib/modules/4.4.0-127-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:     D578DE67B7E1EB3760B717B
depends:        mac80211,ath9k_hw,ath9k_common,cfg80211,ath
retpoline:      Y
intree:         Y
vermagic:       4.4.0-127-generic SMP mod_unload modversions retpoline 
parm:           debug:Debugging mask (uint)
parm:           nohwcrypt:Disable hardware encryption (int)
parm:           blink:Enable LED blink on activity (int)
parm:           led_active_high:Invert LED polarity (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)
parm:           use_chanctx:Enable channel context for concurrency (int)

[ath9k_common]
filename:       /lib/modules/4.4.0-127-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_common.ko
license:        Dual BSD/GPL
description:    Shared library for Atheros wireless 802.11n LAN cards.
author:         Atheros Communications
srcversion:     5E13CACC8C4252BB4B57367
depends:        ath9k_hw,cfg80211,ath
retpoline:      Y
intree:         Y
vermagic:       4.4.0-127-generic SMP mod_unload modversions retpoline 

[ath9k_hw]
filename:       /lib/modules/4.4.0-127-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_hw.ko
license:        Dual BSD/GPL
description:    Support for Atheros 802.11n wireless LAN cards.
author:         Atheros Communications
srcversion:     19C5721EB199C107B73269F
depends:        ath
retpoline:      Y
intree:         Y
vermagic:       4.4.0-127-generic SMP mod_unload modversions retpoline 

[ath]
filename:       /lib/modules/4.4.0-127-generic/kernel/drivers/net/wireless/ath/ath.ko
license:        Dual BSD/GPL
description:    Shared library for Atheros wireless LAN cards.
author:         Atheros Communications
srcversion:     65C8D1B35656DB13F597E87
depends:        cfg80211
retpoline:      Y
intree:         Y
vermagic:       4.4.0-127-generic SMP mod_unload modversions retpoline 

[mac80211]
filename:       /lib/modules/4.4.0-127-generic/kernel/net/mac80211/mac80211.ko
license:        GPL
description:    IEEE 802.11 subsystem
srcversion:     6F6591120B0B257B6E5E85B
depends:        cfg80211
retpoline:      Y
intree:         Y
vermagic:       4.4.0-127-generic SMP mod_unload modversions retpoline 
parm:           minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm:           max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm:           max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm:           beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm:           probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm:           ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)

[cfg80211]
filename:       /lib/modules/4.4.0-127-generic/kernel/net/wireless/cfg80211.ko
description:    wireless configuration support
license:        GPL
author:         Johannes Berg
srcversion:     AF52F2B944842498D5E951F
depends:        
retpoline:      Y
intree:         Y
vermagic:       4.4.0-127-generic SMP mod_unload modversions retpoline 
parm:           bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int)
parm:           ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm:           cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)

##### module parameters #################

[ath9k]
blink: 0
bt_ant_diversity: 0
btcoex_enable: 0
led_active_high: -1
nohwcrypt: 1
ps_enable: 0
use_chanctx: 0

[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500

[cfg80211]
bss_entries_limit: 1000
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00

##### /etc/modules ######################

##### modprobe options ##################

[/etc/modprobe.d/amd64-microcode-blacklist.conf]
blacklist microcode

[/etc/modprobe.d/ath9k.conf]
options ath9k nohwcrypt=1

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist-bcm43.conf]
blacklist b43
blacklist b43legacy
blacklist ssb
blacklist bcm43xx
blacklist brcm80211
blacklist brcmfmac
blacklist brcmsmac
blacklist bcma

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac

[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off

[/etc/modprobe.d/intel-microcode-blacklist.conf]
blacklist microcode

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en

##### rc.local ##########################

exit 0

##### pm-utils ##########################

##### udev rules ########################

##### dmesg #############################

[   87.441558] e1000e: enp0s31f6 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[   87.441564] e1000e 0000:00:1f.6 enp0s31f6: 10/100 speed: disabling TSO
[   87.759852] e1000e: enp0s31f6 NIC Link is Down
[   87.763483] IPv6: ADDRCONF(NETDEV_UP): enp0s31f6: link is not ready (repeated 2 times)
[   89.477550] e1000e: enp0s31f6 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[   89.477563] e1000e 0000:00:1f.6 enp0s31f6: 10/100 speed: disabling TSO
[   89.477634] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s31f6: link becomes ready

########## wireless info END ############

screenshot


EDIT: I updated my ASUS H170 Pro Gaming motherboard to the latest BIOS and the problem got fixed.

2

Please notice the very unusual device ID for your device: 168c:abcd.

When we search for this exact ID, we find this: https://www.mail-archive.com/ath9k-devel@lists.ath9k.org/msg10055.html

some time ago there was a thread "Sparklan WPEA-121N AR9382 168c:abcd" about the issue that the mentioned device was erroneously reported as device ID 0xabcd. There were EEPROM issues assumed and BIOS issues reported that could cause this effect (by resetting the PCI bus at system power on)

And this: https://pci-ids.ucw.cz/read/PC/168c/abcd

ID abcd is used by Atheros devices when not properly initialized by BIOS.

I suggest that you fully update the BIOS on your computer. I also suggest that you be certain that the card is fully and firmly seated in the PCI slot.

I believe this is a hardware issue and not an Ubuntu operating system or driver issue.

  • I updated my ASUS H170 Pro Gaming motherboard to the latest BIOS and the problem got fixed. – Ashish Singh Jun 1 '18 at 21:03

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