Unstable wifi on Mint 17.1

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jemdem
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Posts: 70
Joined: Mon Jan 19, 2015 6:41 am

Unstable wifi on Mint 17.1

Post by jemdem »

Hi all,

my wifi cards detects the network, connects to it, allow me to browse internet, but very slowly and only for a few seconds. Then it tries to reconnect, sometimes succeeds, sometimes not.

I have already disabled Wifi n, change my passwords to TKIP without special caracters and turned off power management.

I don't know what else to do... (I have this problem on tree PCs, two of them have the same card).

Code: Select all

sudo /usr/lib/linuxmint/mintWifi/mintWifi.py
[sudo] password for jay: 
-------------------------
* I. scanning WIFI PCI devices...
  -- Intel Corporation Wireless 7260 (rev 73)
      ==> PCI ID = 8086:08b1 (rev 73)
-------------------------
* II. querying ndiswrapper...
-------------------------
* III. querying iwconfig...
eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          
-------------------------
* IV. querying ifconfig...
eth0      Link encap:Ethernet  HWaddr 80:fa:5b:06:9e:0f  
          inet adr:192.168.1.104  Bcast:192.168.1.255  Masque:255.255.255.0
          adr inet6: fe80::82fa:5bff:fe06:9e0f/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:3252 erreurs:0 :0 overruns:0 frame:0
          TX packets:3457 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:2510349 (2.5 MB) Octets transmis:585049 (585.0 KB)

lo        Link encap:Boucle locale  
          inet adr:127.0.0.1  Masque:255.0.0.0
          adr inet6: ::1/128 Scope:Hôte
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          Packets reçus:619 erreurs:0 :0 overruns:0 frame:0
          TX packets:619 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          Octets reçus:94026 (94.0 KB) Octets transmis:94026 (94.0 KB)

-------------------------
* V. querying DHCP...
RTNETLINK answers: File exists
-------------------------
* VI. querying nslookup google.com...
Server:		192.168.1.1
Address:	192.168.1.1#53

Non-authoritative answer:
Name:	google.com
Address: 173.194.116.134
Name:	google.com
Address: 173.194.116.137
Name:	google.com
Address: 173.194.116.133
Name:	google.com
Address: 173.194.116.129
Name:	google.com
Address: 173.194.116.132
Name:	google.com
Address: 173.194.116.135
Name:	google.com
Address: 173.194.116.128
Name:	google.com
Address: 173.194.116.130
Name:	google.com
Address: 173.194.116.136
Name:	google.com
Address: 173.194.116.142
Name:	google.com
Address: 173.194.116.131

Code: Select all

sudo lspci
00:00.0 Host bridge: Intel Corporation ValleyView SSA-CUnit (rev 0e)
00:02.0 VGA compatible controller: Intel Corporation ValleyView Gen7 (rev 0e)
00:13.0 SATA controller: Intel Corporation ValleyView 6-Port SATA AHCI Controller (rev 0e)
00:14.0 USB controller: Intel Corporation ValleyView USB xHCI Host Controller (rev 0e)
00:1a.0 Encryption controller: Intel Corporation ValleyView SEC (rev 0e)
00:1b.0 Audio device: Intel Corporation ValleyView High Definition Audio Controller (rev 0e)
00:1c.0 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e)
00:1c.1 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e)
00:1c.2 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e)
00:1c.3 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e)
00:1f.0 ISA bridge: Intel Corporation ValleyView Power Control Unit (rev 0e)
00:1f.3 SMBus: Intel Corporation ValleyView SMBus Controller (rev 0e)
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5286 (rev 01)
01:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 06)
02:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)

Code: Select all

sudo lsmod
Module                  Size  Used by
nvram                  14411  0 
uvcvideo               80885  0 
videobuf2_vmalloc      13216  1 uvcvideo
videobuf2_memops       13362  1 videobuf2_vmalloc
videobuf2_core         40664  1 uvcvideo
videodev              134688  2 uvcvideo,videobuf2_core
btusb                  32412  0 
rfcomm                 69160  8 
bnep                   19624  2 
bluetooth             391136  22 bnep,btusb,rfcomm
binfmt_misc            17468  1 
dm_multipath           22873  0 
arc4                   12608  2 
scsi_dh                14882  1 dm_multipath
intel_rapl             18773  0 
coretemp               13435  0 
kvm_intel             143109  0 
kvm                   451552  1 kvm_intel
crct10dif_pclmul       14289  0 
crc32_pclmul           13113  0 
ghash_clmulni_intel    13216  0 
cryptd                 20359  1 ghash_clmulni_intel
snd_hda_codec_hdmi     46368  1 
snd_hda_codec_via      27860  1 
snd_hda_intel          56451  3 
snd_hda_codec         192906  3 snd_hda_codec_hdmi,snd_hda_codec_via,snd_hda_intel
snd_hwdep              13602  1 snd_hda_codec
iwlmvm                189813  0 
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 
mac80211              630653  1 iwlmvm
snd_seq_midi_event     14899  1 snd_seq_midi
snd_rawmidi            30144  1 snd_seq_midi
joydev                 17381  0 
iwlwifi               169932  1 iwlmvm
rtsx_pci_ms            18151  0 
serio_raw              13462  0 
memstick               16966  1 rtsx_pci_ms
snd_seq                61560  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
cfg80211              484040  3 iwlwifi,mac80211,iwlmvm
snd_timer              29482  2 snd_pcm,snd_seq
snd                    69322  17 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_via,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_seq_midi
soundcore              12680  1 snd
parport_pc             32701  0 
mac_hid                13205  0 
ppdev                  17671  0 
lp                     17759  0 
parport                42348  3 lp,ppdev,parport_pc
dm_mirror              22135  0 
dm_region_hash         20862  1 dm_mirror
dm_log                 18411  2 dm_region_hash,dm_mirror
rtsx_pci_sdmmc         23274  0 
psmouse               106678  0 
r8169                  67581  0 
mii                    13934  1 r8169
rtsx_pci               46202  2 rtsx_pci_ms,rtsx_pci_sdmmc
i915                  783805  3 
wmi                    19177  0 
i2c_algo_bit           13413  1 i915
ahci                   25819  3 
drm_kms_helper         55071  1 i915
libahci                32716  1 ahci
drm                   303102  4 i915,drm_kms_helper
video                  19476  1 i915
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
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JeremyB
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Posts: 13880
Joined: Fri Feb 21, 2014 8:17 am

Re: Unstable wifi on Mint 17.1

Post by JeremyB »

Can you run this command and paste the contents of the wireless-info.txt file it creates

Code: Select all

wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script
You might have better performance without TKIP, WPA2-AES seems to work the best in Linux
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jemdem
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Joined: Mon Jan 19, 2015 6:41 am

Re: Unstable wifi on Mint 17.1

Post by jemdem »

Code: Select all

jay@jay-W51XTU ~ $     wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script
--2015-01-21 11:10:45--  http://dl.dropbox.com/u/57264241/wireless_script
Résolution de dl.dropbox.com (dl.dropbox.com)... 54.221.211.187
Connexion vers dl.dropbox.com (dl.dropbox.com)|54.221.211.187|:80... connecté.
requête HTTP transmise, en attente de la réponse... 302 FOUND
Emplacement: http://dl.dropboxusercontent.com/u/57264241/wireless_script [suivant]
--2015-01-21 11:10:51--  http://dl.dropboxusercontent.com/u/57264241/wireless_script
Résolution de dl.dropboxusercontent.com (dl.dropboxusercontent.com)... 54.83.45.92, 184.72.249.238, 54.243.113.159, ...
Connexion vers dl.dropboxusercontent.com (dl.dropboxusercontent.com)|54.83.45.92|:80... connecté.
requête HTTP transmise, en attente de la réponse... 302 FOUND
Un cookie provenant de dl.dropboxusercontent.com a tenté de changer le domaine en dropbox.com
Un cookie provenant de dl.dropboxusercontent.com a tenté de changer le domaine en dropbox.com
Emplacement: https://dl.dropboxusercontent.com/u/57264241/wireless_script [suivant]
--2015-01-21 11:10:51--  https://dl.dropboxusercontent.com/u/57264241/wireless_script
Connexion vers dl.dropboxusercontent.com (dl.dropboxusercontent.com)|54.83.45.92|:443... connecté.
requête HTTP transmise, en attente de la réponse... 200 OK
Taille : 13362 (13K) [text/plain]
Enregistre : «wireless_script»

100%[======================================>] 13.362      --.-K/s   ds 0s      

En-tête de dernière modification manquant -- horodatage ignoré.
2015-01-21 11:10:52 (52,5 MB/s) - «wireless_script» enregistré [13362/13362]

[sudo] password for jay: 

Results saved in "/home/jay/wireless-info.txt".

Results also archived in "/home/jay/wireless-info.tar.gz", as they exceed the 19.5 kB size limit for ".txt" attachments on the Ubuntu Forums.
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JeremyB
Level 21
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Posts: 13880
Joined: Fri Feb 21, 2014 8:17 am

Re: Unstable wifi on Mint 17.1

Post by JeremyB »

jemdem wrote:

Code: Select all

jay@jay-W51XTU ~ $     wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script
--2015-01-21 11:10:45--  http://dl.dropbox.com/u/57264241/wireless_script
Résolution de dl.dropbox.com (dl.dropbox.com)... 54.221.211.187
Connexion vers dl.dropbox.com (dl.dropbox.com)|54.221.211.187|:80... connecté.
requête HTTP transmise, en attente de la réponse... 302 FOUND
Emplacement: http://dl.dropboxusercontent.com/u/57264241/wireless_script [suivant]
--2015-01-21 11:10:51--  http://dl.dropboxusercontent.com/u/57264241/wireless_script
Résolution de dl.dropboxusercontent.com (dl.dropboxusercontent.com)... 54.83.45.92, 184.72.249.238, 54.243.113.159, ...
Connexion vers dl.dropboxusercontent.com (dl.dropboxusercontent.com)|54.83.45.92|:80... connecté.
requête HTTP transmise, en attente de la réponse... 302 FOUND
Un cookie provenant de dl.dropboxusercontent.com a tenté de changer le domaine en dropbox.com
Un cookie provenant de dl.dropboxusercontent.com a tenté de changer le domaine en dropbox.com
Emplacement: https://dl.dropboxusercontent.com/u/57264241/wireless_script [suivant]
--2015-01-21 11:10:51--  https://dl.dropboxusercontent.com/u/57264241/wireless_script
Connexion vers dl.dropboxusercontent.com (dl.dropboxusercontent.com)|54.83.45.92|:443... connecté.
requête HTTP transmise, en attente de la réponse... 200 OK
Taille : 13362 (13K) [text/plain]
Enregistre : «wireless_script»

100%[======================================>] 13.362      --.-K/s   ds 0s      

En-tête de dernière modification manquant -- horodatage ignoré.
2015-01-21 11:10:52 (52,5 MB/s) - «wireless_script» enregistré [13362/13362]

[sudo] password for jay: 

Results saved in "/home/jay/wireless-info.txt".

Results also archived in "/home/jay/wireless-info.tar.gz", as they exceed the 19.5 kB size limit for ".txt" attachments on the Ubuntu Forums.
Letes try another way

Code: Select all

sudo apt-get install pastebinit

Code: Select all

pastebinit -i wireless-info.txt
and paste the URL that appears in the terminal
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jemdem
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Posts: 70
Joined: Mon Jan 19, 2015 6:41 am

Re: Unstable wifi on Mint 17.1

Post by jemdem »

Terminal says:

Code: Select all

$ pastebinit -i wireless-info.txt

Bad API request, invalid api_dev_key
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karlchen
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Location: Germany

Re: Unstable wifi on Mint 17.1

Post by karlchen »

Hello, jemdem.

On Mint 17.1 you do no longer need the command pastebinit, because as you may find in the System Improvement section of Mint 17.1 it comes with a new command pastebin out of the box:
System improvements
Linux Mint 17.1 features the following system changes:
  • A new pastebin command was introduced. You can pipe a command into it or simply give it a filename. The text is then available online for 2 days:
    • echo "Hello World!" | pastebin
    • pastebin myfile.txt
Provided you are in the folder where the file wireless-info.txt has been stored, the command

Code: Select all

pastebin wireless-info.txt
should do the job and upload the file to Pastebin and return the needed URL.
--
You may wish to uninstall the obsolete pastebinit by executing this command

Code: Select all

sudo apt-get remove pastebinit
Cheers,
Karl
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jemdem
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Re: Unstable wifi on Mint 17.1

Post by jemdem »

Ah ok thank you.

Any idea were the file might be?
I dId a search on the whole system, nothing came out.
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karlchen
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Location: Germany

Re: Unstable wifi on Mint 17.1

Post by karlchen »

Hello, jemdem.

About where the file wireless-info.txt might be:

Let us go back to a previous commandline which you were given and asked to execute.
You executed

Code: Select all

wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script
In fact these are 3 commands on a single line:
1. get the script wireless_script
2. make wireless_script executable
3. execute the script wireless_script

The script wireless_script will write the file wireless-info.txt.

You posted the whole screen output generated by the 3 commands yourself. :wink:

Near the end of this screen output there is the line

Code: Select all

Results saved in "/home/jay/wireless-info.txt"
So the file wireless-info.txt should be found in your home folder.

Therefore this command should work:

Code: Select all

pastebin /home/jay/wireless-info.txt
Kind regards,
Karl
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The people of Alderaan have been bravely fighting back the clone warriors sent out by the unscrupulous Sith Lord Palpatine for 792 days now.
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jemdem
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Re: Unstable wifi on Mint 17.1

Post by jemdem »

Ah ok sorry.
How is it the search utiliy don't find it then, it's strange... I runned it, in /home and in /

Anyway, here it is: http://paste.linuxmint.com/view/5l1v
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JeremyB
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Re: Unstable wifi on Mint 17.1

Post by JeremyB »

It seems that TKIP may be causing some of your issues, go back to AES encryption

And one other thing that might be causing problem

Code: Select all

sudo gedit /etc/modprobe.d/iwlwifi.conf
It should be

Code: Select all

# /etc/modprobe.d/iwlwifi.conf
# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
# microcode file installed on the system.  When removing iwlwifi, first
# remove the iwl?vm module and then iwlwifi.
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
options iwlwifi 11n_disable=8
Save, exit program reboot
11n_disable=8 enables agg tx which seems to help the 7260 and other intel wifi cards

Another thing that could help is to set your country code, if you are in Belgium then

Code: Select all

sudo iw reg set BE
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jemdem
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Re: Unstable wifi on Mint 17.1

Post by jemdem »

I did everything as you suggested but it's still completely unstable. Any other idea?
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JeremyB
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Re: Unstable wifi on Mint 17.1

Post by JeremyB »

Lets see if the backports will stabilize the connection

Code: Select all

wget -N -t 5 -T 10 https://www.kernel.org/pub/linux/kernel/projects/backports/stable/v3.18.1/backports-3.18.1-1.tar.xz

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tar -xf backports-3.18.1-1.tar.xz

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cd ~/backports-3.18.1-1

Code: Select all

make defconfig-iwlwifi

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make

Code: Select all

sudo make install
Reboot
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jemdem
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Re: Unstable wifi on Mint 17.1

Post by jemdem »

Ok, that's already better. Now when I'm just beside the wifi router I get a stable connection. But one room away (where then other different computers with different wifi cards use wifi all day without a problem) it still doesn't work (wifi signal around 50-60%).

Is this wifi card known to be really poorer than average?
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JeremyB
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Re: Unstable wifi on Mint 17.1

Post by JeremyB »

jemdem wrote:Ok, that's already better. Now when I'm just beside the wifi router I get a stable connection. But one room away (where then other different computers with different wifi cards use wifi all day without a problem) it still doesn't work (wifi signal around 50-60%).

Is this wifi card known to be really poorer than average?
It doesn't seem any worse than other wifi cards I have. It might be part of the driver that deals with rx signal attenuation which could be fixed but if it is an issue with the firmware we will be waiting on Intel to release new firmware
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jemdem
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Re: Unstable wifi on Mint 17.1

Post by jemdem »

Ok thanks.
I think I'm gonna replace it with another card...
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