Ubuntu 12.04 Slow Wireless

[TheNessus]

open terminal and type:
sudo rmmod iwlwifi
sudo modprobe iwlwifi 11n_disable=1

if it works make it permanent by:
opening/creating /etc/modprobe.d/options.conf and adding the following line
options iwlwifi 11n_disable=1

it resolved my issue. In my case in 11.10 the iwlwifi was defined as wilagn.

it sucks as this issue was known in the previous release and did not get resolved out of the box. Shame on you Ubuntu. Anyway, hope it helps.

I did this now (with "rmmod brcmsmac" instead")
it resulted in no wifi anymore, and I cannot load Ubuntu anymore, it stalls in the purple Ubuntu screen. Ubuntu only loads if I disable wifi in the BIOS.

damn.

how do I undo this?

[chamber]

@ OP

I use that usb device as well.

Did it detect it automatically for you or did you have to install drivers?

I found that when it detected the device automatically for me it was very slow, I used the drivers from here which helped.

http://www.realtek.com.tw/downloads/...oads=true#2772

There is an install shell script included in the zip folder.

[KYSL]

I did this now (with "rmmod brcmsmac" instead")
it resulted in no wifi anymore, and I cannot load Ubuntu anymore, it stalls in the purple Ubuntu screen. Ubuntu only loads if I disable wifi in the BIOS.

damn.

how do I undo this?

Sorry for the driver conflict that resulted. I am not an expert in these wifi driver but googling the issue i found this post that may help.
https://bugs.launchpad.net/ubuntu/+s...ux/+bug/875892

[TheNessus]

Sorry for the driver conflict that resulted. I am not an expert in these wifi driver but googling the issue i found this post that may help.
https://bugs.launchpad.net/ubuntu/+s...ux/+bug/875892

It's ok, I solved it. my adapter got blacklisted and I removed it from the list.

thanks though!

[vDub2000]

@ OP

I use that usb device as well.

Did it detect it automatically for you or did you have to install drivers?

I found that when it detected the device automatically for me it was very slow, I used the drivers from here which helped.

http://www.realtek.com.tw/downloads/...oads=true#2772

There is an install shell script included in the zip folder.

they were automatically detected and installed.

How do I go about installing the drivers from that website?

[chamber]

Download the linux drivers from the website I linked to.

Extract the drivers and then open a terminal and cd to the extracted folder.

Once in the extracted folder run

bash install.sh

This will compile the drivers for you.

You will be prompted for your root password while it is working.

[garrychnca]

Hi, most people have not gotten that driver to work at all I believe, please post the output of:

cat /etc/lsb-release; uname -a
lspci -nnk | grep -iA2 net
lsusb
iwconfig
rfkill list all
lsmod
nm-tool

here by clicking on new reply and click # and paste the information between the brackets.
Thank you

cat /etc/lsb-release; uname -a

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"
Linux GarryHP 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

lspci -nnk | grep -iA2 net

01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 03)
    Subsystem: Hewlett-Packard Company Device [103c:146a]
    Kernel driver in use: r8169
--
02:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 1000 [8086:0084]
    Subsystem: Intel Corporation Centrino Wireless-N 1000 BGN [8086:1315]
    Kernel driver in use: iwlwifi

lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 003: ID 046d:c521 Logitech, Inc. Cordless Mouse Receiver
Bus 001 Device 004: ID 138a:0005 Validity Sensors, Inc. VFS301 Fingerprint Reader
Bus 002 Device 004: ID 10f1:1a28 Importek

iwconfig

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"(hide from view)"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 68:7F:74:2C:08:46   
          Bit Rate=1 Mb/s   Tx-Power=14 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=35/70  Signal level=-75 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:1304  Invalid misc:122   Missed beacon:0

eth0      no wireless extensions.

rfkill list all

0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: hp-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no

lsmod

Module                  Size  Used by
snd_hda_codec_hdmi     32474  1 
snd_hda_codec_idt      70795  1 
bnep                   18281  2 
rfcomm                 47604  0 
bluetooth             180104  10 bnep,rfcomm
parport_pc             32866  0 
ppdev                  17113  0 
arc4                   12529  2 
hp_wmi                 18092  0 
sparse_keymap          13890  1 hp_wmi
joydev                 17693  0 
uvcvideo               72627  0 
snd_hda_intel          33773  3 
snd_hda_codec         127706  3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
psmouse                87603  0 
videodev               98259  1 uvcvideo
snd_hwdep              13668  1 snd_hda_codec
v4l2_compat_ioctl32    17128  1 videodev
serio_raw              13211  0 
snd_pcm                97188  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
usbhid                 47199  0 
hid                    99559  1 usbhid
snd_seq_midi           13324  0 
wmi                    19256  1 hp_wmi
snd_rawmidi            30748  1 snd_seq_midi
iwlwifi               328352  0 
mac80211              506816  1 iwlwifi
mac_hid                13253  0 
hp_accel               25976  0 
lis3lv02d              19876  1 hp_accel
input_polldev          13896  1 lis3lv02d
snd_seq_midi_event     14899  1 snd_seq_midi
snd_seq                61896  2 snd_seq_midi,snd_seq_midi_event
cfg80211              205544  2 iwlwifi,mac80211
intel_ips              18089  0 
snd_timer              29990  2 snd_pcm,snd_seq
i915                  468651  3 
snd_seq_device         14540  3 snd_seq_midi,snd_rawmidi,snd_seq
drm_kms_helper         46978  1 i915
drm                   242038  4 i915,drm_kms_helper
mei                    41616  0 
snd                    78855  16 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
i2c_algo_bit           13423  1 i915
video                  19596  1 i915
soundcore              15091  1 snd
lp                     17799  0 
snd_page_alloc         18529  2 snd_hda_intel,snd_pcm
parport                46562  3 parport_pc,ppdev,lp
r8169                  62099  0

nm-tool

NetworkManager Tool

State: connected (global)

- Device: wlan0  [(hide from view)] --------------------------------
  Type:              802.11 WiFi
  Driver:            iwlwifi
  State:             connected
  Default:           yes
  HW Address:        00:26:C7:8C:1A:E8

  Capabilities:
    Speed:           1 Mb/s

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points (* = current AP)
    
    *(hide from view): Infra, 68:7F:74:2C:08:46, Freq 2412 MHz, Rate 54 Mb/s, Strength 57 WEP
    

  IPv4 Settings:
    Address:         192.168.1.107
    Prefix:          24 (255.255.255.0)
    Gateway:         192.168.1.1

    DNS:             192.168.1.1
    DNS:             64.71.255.198

- Device: eth0 -----------------------------------------------------------------
  Type:              Wired
  Driver:            r8169
  State:             unavailable
  Default:           no
  HW Address:        (hide from view)

  Capabilities:
    Carrier Detect:  yes

  Wired Properties
    Carrier:         off

Thanks!

[wildmanne39]

Hi, please copy and paste the commands one line at a time:

echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf
sudo modprobe -rfv iwlwifi
sudo modprobe -v iwlwifi

Thanks

[garrychnca]

THANKS!

it works!! this problem bothered me for quite a long time!

In addition, why removing iwlwifi module would make it work?

Thank you again!

[wildmanne39]

Hi, your welcome! you removed the module but loaded it again with a parameter that turned off N speed because N speed does not work well in linux with intel drivers.
Thanks