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Old 01-11-2013, 06:05 AM   #1
fierytux
LQ Newbie
 
Registered: Jan 2013
Distribution: Arch Linux
Posts: 5

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Problem with my WiFi adapter


Hi all,
I have a very weird problem in my laptop right now. My WiFi gets connected to my home router, I can browse internet and everything works normally for some 30 minutes. But, after that I cannot ping either to my router or any external IPs and still my applet shows I'm connected and the signal strength too varies with the distance.

Since, it is working fine in Windows (same laptop) I thought there was some problem with that distro and I even reinstalled it. But, still the problem persists in the new distro too.

After the connection gets dropped

Code:
$ ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr b8:03:05:36:29:6e  
          inet addr:192.168.1.5  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::ba03:5ff:fe36:296e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:382046 errors:0 dropped:0 overruns:0 frame:0
          TX packets:255023 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:482804122 (482.8 MB)  TX bytes:30810637 (30.8 MB)
Code:
$ iwconfig
wlan0     IEEE 802.11bgn  ESSID:"Krishh-ll"  
          Mode:Managed  Frequency:2.432 GHz  Access Point: 00:26:15:5F:C3:53   
          Bit Rate=1 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=70/70  Signal level=-39 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:49   Missed beacon:0
Code:
$ lspci | grep Wireless
01:00.0 Network controller: Intel Corporation Centrino Wireless-N 130 (rev 34
Code:
$ rfkill list all
0: samsung-wlan: Wireless LAN
	Soft blocked: no
	Hard blocked: no
1: samsung-bluetooth: Bluetooth
	Soft blocked: yes
	Hard blocked: no
3: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
And also, when the connection goes down, if I do

Code:
 
$ sudo ifconfig wlan0 down
$ sudo ifconfig wlan0 up
it works fine for the next 30 mintes. Please guys, help me out.

EDIT:
Forgot to include that I also tried installing the WiFi drivers manually from kernel.org but, even that didn't work out

Last edited by fierytux; 01-11-2013 at 06:09 AM. Reason: Forgot to include reinstalling wireless firmware
 
Old 01-12-2013, 02:17 AM   #2
rosehosting.com
Member
 
Registered: Jun 2012
Posts: 222

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hi fierytux,

you didn't say what GNU/Linux distro you're using? Anyhow, I've seen this happening to some other folks and I think you're hit by this bug.

what relevant modules are loaded for your card? as suggested, in order to fix this as a workaround you may want try disabling '11n' so it wont load on your system startup.

so you need to modprobe 'iwlwifi' and '11n_disable=1'.
 
1 members found this post helpful.
Old 01-12-2013, 03:04 AM   #3
fierytux
LQ Newbie
 
Registered: Jan 2013
Distribution: Arch Linux
Posts: 5

Original Poster
Rep: Reputation: Disabled
Thanks for the reply, rosehosting.com

I didn't notice that I missed to include the current distro. I was using Arch till 3 days back and now reinstalled with Ubuntu 12.10.
My current uname -a
Code:
Linux fox 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
These are the modules loaded for my adapter:
Code:
iwlwifi               386826  0 
mac80211              539908  1 iwlwifi
cfg80211              206566  2 iwlwifi,mac80211
I'll try disabling 11n now and see if its working out.
 
Old 01-12-2013, 09:14 AM   #4
fierytux
LQ Newbie
 
Registered: Jan 2013
Distribution: Arch Linux
Posts: 5

Original Poster
Rep: Reputation: Disabled
After disabling 11n, I'm getting disconnects unlike previouly when the applet showed I'm connected. Even now, if I disable wireless and connect again, it gets connected and works fine.
 
  


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