14.04 LTS Wifi issue (Qualcomm Atheros AR242x/AR542x)

**tim50** · June 8th, 2014

Hello,

I've recently come over to 14.04 (formerly Xubuntu 13.10, now Lubuntu) on my old HP DV5 1125nr laptop, and am now having all sorts of trouble getting the wireless to work. I understand this is something of a common problem on 14.04 LTS, but I can't seem to find a method to resolve my specific driver issue.

Code:

sudo lshw -C network

indicates I have a Qualcomm Atheros AR242x / AR542x wifi adapter. While I am willing to acknowledge my Linux noob status, I've tried to do some Google-ing and it appears I will need to install the drivers through the terminal, but I'm not exactly sure what steps to follow to accomplish that task.

So I am asking you wise sages for assistance. Any help would be greatly appreciated. I'll also do my best to provide any other needed information, as requested.

Thank you kindly.

**praseodym** · June 8th, 2014

Hi,

please show these outputs:

Code:

lspci -nnk | grep -iA2 net
lsmod
iwconfig
rfkill list
cat /etc/resolv.conf

**tim50** · June 8th, 2014

Code:

08:00.0 Ethernet controller [0200]: Qualcomm Atheros AR242x / AR542x Wireless Network Adapter (PCI-Express) [168c:001c] (rev 01)
    Subsystem: Hewlett-Packard Company AR5BXB63 (Foxconn) 802.11bg Mini PCIe NIC [103c:137a]
    Kernel driver in use: ath5k
09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02)
    Subsystem: Hewlett-Packard Company Device [103c:30f2]
    Kernel driver in use: r8169

Code:

Module                  Size  Used by
arc4                   12608  2 
dm_crypt               23177  0 
hp_wmi                 14062  0 
sparse_keymap          13948  1 hp_wmi
snd_hda_codec_hdmi     46207  1 
snd_hda_codec_idt      54645  1 
kvm                   451511  0 
uvcvideo               80885  0 
videobuf2_vmalloc      13216  1 uvcvideo
snd_hda_intel          52355  1 
videobuf2_memops       13362  1 videobuf2_vmalloc
videobuf2_core         40664  1 uvcvideo
snd_hda_codec         192906  3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
videodev              134688  2 uvcvideo,videobuf2_core
joydev                 17381  0 
snd_hwdep              13602  1 snd_hda_codec
ath5k                 149924  0 
ath                    28698  1 ath5k
snd_pcm               102099  3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
serio_raw              13462  0 
k10temp                13126  0 
mac80211              626557  1 ath5k
sp5100_tco             13979  0 
rfcomm                 69160  0 
i2c_piix4              22155  0 
bnep                   19624  2 
bluetooth             395423  10 bnep,rfcomm
snd_page_alloc         18710  2 snd_pcm,snd_hda_intel
cfg80211              484040  3 ath,ath5k,mac80211
snd_seq_midi           13324  0 
ir_lirc_codec          13021  0 
lirc_dev               19980  1 ir_lirc_codec
ir_mce_kbd_decoder     13214  0 
ir_sanyo_decoder       12839  0 
ir_sony_decoder        12713  0 
ir_jvc_decoder         12751  0 
ir_rc6_decoder         12874  0 
snd_seq_midi_event     14899  1 snd_seq_midi
ir_rc5_decoder         12710  0 
ir_nec_decoder         12915  0 
snd_rawmidi            30144  1 snd_seq_midi
rc_rc6_mce             12502  0 
ene_ir                 22536  0 
rc_core                28124  12 lirc_dev,ir_lirc_codec,ir_rc5_decoder,ir_nec_decoder,ir_sony_decoder,ene_ir,ir_mce_kbd_decoder,ir_jvc_decoder,ir_rc6_decoder,ir_sanyo_decoder,rc_rc6_mce
snd_seq                61560  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              29482  2 snd_pcm,snd_seq
hp_accel               26012  0 
lis3lv02d              20156  1 hp_accel
input_polldev          13896  1 lis3lv02d
snd                    69238  13 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_idt,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_seq_midi
soundcore              12680  1 snd
shpchp                 37032  0 
mac_hid                13205  0 
parport_pc             32701  0 
ppdev                  17671  0 
lp                     17759  0 
parport                42348  3 lp,ppdev,parport_pc
pata_acpi              13038  0 
ums_realtek            18029  0 
usb_storage            62209  1 ums_realtek
psmouse               102222  0 
pata_atiixp            13271  0 
r8169                  67581  0 
radeon               1514165  2 
mii                    13934  1 r8169
wmi                    19177  1 hp_wmi
i2c_algo_bit           13413  1 radeon
ttm                    85115  1 radeon
video                  19476  0 
drm_kms_helper         52758  1 radeon
drm                   302817  4 ttm,drm_kms_helper,radeon
ahci                   25819  1 
libahci                32168  1 ahci

Code:

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

Code:

0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

Code:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

**praseodym** · June 8th, 2014

The driver is Ok, but needs some "help". Additionally,there are no nameservers listed:

Code:

echo "options ath5k nohwcrypt=1" | sudo tee -a /etc/modprobe.d/ath5k.conf
sudo modprobe -rfv ath5k
sudo modprobe -v ath5k
echo "nameserver 8.8.8.8\nnameserver 8.8.4.4" | sudo tee -a /etc/resolv.conf
sudo service network-manager restart

**tim50** · June 8th, 2014

Thank you for your assistance. Unfortunately nothing seems to have changed after typing those commands into terminal. I also rebooted just to make sure.

-edit- I should note that after modprobe -v ath5k the "you are now disconnected" prompt popped up for a moment. Ditto after the network manager restart.

Code:

tim@tim-Notebook-PC:~$ sudo "options ath5k nohwcrypt=1" | sudo tee -a /etc/modprobe.d/ath5k.conf
usage: sudo -h | -K | -k | -V
usage: sudo -v [-AknS] [-g group] [-h host] [-p prompt] [-u user]
usage: sudo -l [-AknS] [-g group] [-h host] [-p prompt] [-U user] [-u user]
            [command]
usage: sudo [-AbEHknPS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p
            prompt] [-u user] [VAR=value] [-i|-s] [<command>]
usage: sudo -e [-AknS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p
            prompt] [-u user] file ...
[sudo] password for tim: 
tim@tim-Notebook-PC:~$ sudo modprobe -rfv ath5k
rmmod ath5k
rmmod mac80211
rmmod ath
rmmod cfg80211
tim@tim-Notebook-PC:~$ sudo modprobe -v ath5k
insmod /lib/modules/3.13.0-29-generic/kernel/net/wireless/cfg80211.ko 
insmod /lib/modules/3.13.0-29-generic/kernel/net/mac80211/mac80211.ko 
insmod /lib/modules/3.13.0-29-generic/kernel/drivers/net/wireless/ath/ath.ko 
insmod /lib/modules/3.13.0-29-generic/kernel/drivers/net/wireless/ath/ath5k/ath5k.ko nohwcrypt=1 
tim@tim-Notebook-PC:~$ echo "nameserver 8.8.8.8\nnameserver 8.8.4.4" | sudo tee -a /etc/resolv.conf
nameserver 8.8.8.8\nnameserver 8.8.4.4
tim@tim-Notebook-PC:~$ sudo service network-manager restart
network-manager stop/waiting
network-manager start/running, process 1826
tim@tim-Notebook-PC:~$

**praseodym** · June 8th, 2014

Can you scan?

Code:

iwlist chan
sudo iwlist scan

Deactivate IPv6 in the wireless profile

**tim50** · June 8th, 2014

Code:

tim@tim-Notebook-PC:~$ iwlist chan
eth0      no frequency information.

lo        no frequency information.

wlan0     11 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
tim@tim-Notebook-PC:~$ sudo iwlist scan
[sudo] password for tim: 
eth0      Interface doesn't support scanning.

lo        Interface doesn't support scanning.

wlan0     No scan results

Is this what I do to disable IPv6: http://www.ubuntuvibes.com/2011/01/q...in-ubuntu.html ? Otherwise I do not know how.

**praseodym** · June 8th, 2014

You can do it like that, otherwise in the wireless profile "IPv6 settings" to IGNORE

Only 11 channels. On whick one does the router send?

**tim50** · June 8th, 2014

The wireless settings GUI that I had in the previous version of Xubuntu doesn't exist anywhere in 14.04 as far as I can tell. I have "network" and "network connections" only. So I'm not sure how to disable IPv6 in the manner you suggested. Regardless, I disabled it and verified it is disabled using:

Code:

cat /proc/sys/net/ipv6/conf/all/disable_ipv6

As for my router, it's set to "auto" (Linksys WRT 120N), which I believe is 6.

I don't know if it matters in regards to your current questions, but I'm not currently connected to any internet connection (wired or wireless) on the laptop in question. I've just been typing commands you suggest and then pasting the results over my main rig.

**hideo2** · December 26th, 2014

disabling IPv6 worked for me.

ubuntu studio 14.04LTS
driver: ath9k

Thread: 14.04 LTS Wifi issue (Qualcomm Atheros AR242x/AR542x)

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