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Old 10-02-2011, 06:22 PM   #1
biomimetic
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Registered: Aug 2011
Posts: 14

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Question Flapping connection ONLY in LINUX


Ok so for the most annoying thing I've ever experienced in my journey to switch to Linux.

I'm running Mint 11 (Ubuntu 11) on my netbook which is my main machine. I have a PK5000z Qwest DSL modem/wifi router. These 2 HATE each other. Any and EVERY time I use it my connection drops entirely or gets so slow its intolerable to use.

I've used this same netbook on this same router running Win7. My girlfriend sits right next ot me with her phone on WiFi and her netbook on wifi all running perfectly, while my netbook and my nettop both running Mint 11 have no connection or slower than 56k.

I thought to traceroute the issue to see it working and not working

When its working it looks something like this:
traceroute to linuxquestions.org (75.126.162.205), 30 hops max, 60 byte packets
1 192.168.0.1 (192.168.0.1) 114.680 ms 115.980 ms 117.473 ms
2 hlrn-dsl-gwxx-xxx.hlrn.qwest.net (XXX.xxx.XXX.xxx) 103.877 ms 105.449 ms 107.472 ms
3 hlrn-agw1.inet.qwest.net (71.217.190.145) 118.825 ms * *
4 dvr-edge-13.inet.qwest.net (67.14.24.93) 120.964 ms 122.391 ms 123.796 ms
5 te2-6.bbr01.cf01.den01.networklayer.com (65.122.22.90) 126.754 ms 133.545 ms *
6 * po4.bbr02.eq01.dal01.networklayer.com (173.192.18.138) 510.125 ms 510.026 ms
7 ae1.dar01.sr01.dal01.networklayer.com (173.192.18.255) 509.470 ms ae0.dar02.sr01.dal01.networklayer.com (173.192.18.213) 151.813 ms ae1.dar01.sr01.dal01.networklayer.com (173.192.18.255) 208.096 ms
8 po1.fcr02.sr04.dal01.networklayer.com (66.228.118.178) 202.388 ms 204.695 ms po2.fcr02.sr04.dal01.networklayer.com (66.228.118.182) 206.585 ms
9 www.linuxquestions.org (75.126.162.205) 212.475 ms 218.161 ms 219.572 ms

When its NOT working it looks like:

traceroute to linuxquestions.org (75.126.162.205), 30 hops max, 60 byte packets
1 * * *
2 hlrn-dsl-gw83-148.hlrn.qwest.net (207.225.112.148) 605.054 ms 606.404 ms 611.238 ms
3 * * *
4 * * *
5 * * *
6 * po4.bbr02.eq01.dal01.networklayer.com (173.192.18.138) 106.088 ms 106.774 ms
7 ae0.dar02.sr01.dal01.networklayer.com (173.192.18.213) 111.439 ms * *
8 po2.fcr02.sr04.dal01.networklayer.com (66.228.118.182) 1113.095 ms po1.fcr02.sr04.dal01.networklayer.com (66.228.118.178) 611.775 ms po2.fcr02.sr04.dal01.networklayer.com (66.228.118.182) 1026.330 ms
9 www.linuxquestions.org (75.126.162.205) 509.387 ms * 96.682 ms

PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
From 192.168.0.13 icmp_seq=28 Destination Host Unreachable
From 192.168.0.13 icmp_seq=29 Destination Host Unreachable
From 192.168.0.13 icmp_seq=33 Destination Host Unreachable
From 192.168.0.13 icmp_seq=35 Destination Host Unreachable
From 192.168.0.13 icmp_seq=36 Destination Host Unreachable
From 192.168.0.13 icmp_seq=39 Destination Host Unreachable
From 192.168.0.13 icmp_seq=40 Destination Host Unreachable
From 192.168.0.13 icmp_seq=43 Destination Host Unreachable
From 192.168.0.13 icmp_seq=48 Destination Host Unreachable
From 192.168.0.13 icmp_seq=49 Destination Host Unreachable
From 192.168.0.13 icmp_seq=50 Destination Host Unreachable
64 bytes from 192.168.0.1: icmp_req=51 ttl=254 time=157 ms
64 bytes from 192.168.0.1: icmp_req=52 ttl=254 time=77.4 ms
64 bytes from 192.168.0.1: icmp_req=53 ttl=254 time=304 ms
64 bytes from 192.168.0.1: icmp_req=54 ttl=254 time=224 ms
64 bytes from 192.168.0.1: icmp_req=55 ttl=254 time=145 ms
64 bytes from 192.168.0.1: icmp_req=56 ttl=254 time=66.4 ms
64 bytes from 192.168.0.1: icmp_req=57 ttl=254 time=293 ms
64 bytes from 192.168.0.1: icmp_req=58 ttl=254 time=214 ms
From 192.168.0.13 icmp_seq=106 Destination Host Unreachable
From 192.168.0.13 icmp_seq=107 Destination Host Unreachable
64 bytes from 192.168.0.1: icmp_req=115 ttl=254 time=41.4 ms

This was when it was intolerably slow.

I've changed the DNS on my nettop to OpenDNS to see if that worked. It did not. I'm still loosing my conenction or getting so much packet loss that I'm loosing my hair over it. lol

I DO NOT have this problem ANYWHERE else. My work network- good to go. My buddy's networks- flawless. Home- Worst Connection EVER.
Also this issue seems to happen when wired as well. I will double check this when I get home but I'm pretty sure I tried it and still had a crappy connection while other PCs running Win7 or XP were just fine on wifi and plugged in.

What could be causing this issue? I LOVE Linux and want to switch my whole family over to it but first I need to fix this issue before I have 3 more computers running this terrible connection.

ALSO I know getting a different router would probably fix this but that isn't an option for me right now. I have it ordered and its shipping. So in the mean time... I need a solution.

edit: did some searching and saw WPS could be causing a similar issue. Turning it off to see if it is improved.
And it isn't that either. Also I put my laptop in the DMZ- and it still is doing this.

Last edited by biomimetic; 10-02-2011 at 07:21 PM.
 
Old 10-02-2011, 08:32 PM   #2
kbp
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Are you seeing the wireless network signal strength drop off when your pings are failing?
 
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Old 10-02-2011, 09:32 PM   #3
biomimetic
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yes 1 bar. It drops from 5 bars to 4 almost every single time this happens even when I'm less than 2 feet from it.
 
Old 10-03-2011, 02:53 AM   #4
repo
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Quote:
Also this issue seems to happen when wired as well. I will double check this when I get home but I'm pretty sure I tried it and still had a crappy connection while other PCs running Win7 or XP were just fine on wifi and plugged in.
Did you checked the wired connection?
Try to disable wep or wpa, to see if the problem persist.
Try to disable ipv6 systemwide.
You could boot from a live cd like puppy, and see if the problem persist.

Kind regards
 
1 members found this post helpful.
Old 10-03-2011, 08:08 AM   #5
biomimetic
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I tried the wired connection thing last night and it was so weird- I could not edit any of my connections. I'd click the dropdown - then the "enable wireless" networking to turn it off and nothing would happen. So I tried to edit my connections and the window never opened.

frustrating to say the least.

I will try those things when I get home tonight though. Thanks for the great response time! How do I disable ipv6 system wide?
 
Old 10-03-2011, 08:21 AM   #6
repo
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Edit
Code:
/etc/modprobe.d/blacklist 
or
/etc/modprobe.d/blacklist.conf
add
Code:
blacklist ipv6
Kind regards
 
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Old 10-03-2011, 08:28 PM   #7
biomimetic
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Registered: Aug 2011
Posts: 14

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ok tried blacklisting ipv6 and it still didn't work - still pinging my modem and getting Destination host unreachable. So moving on to disabling the WPA in my modem (which naturally makes me very weary. I suppose I'll just change and hide my SSID while I make these changes & continue troubleshooting.)

Thanks so much all for the quick responses.

update/edit: Turning off WPA seemed like it worked like a charm. Would WEP cause this issue too? and is this a common problem? I really dislike having my wifi totally unsecured besides having an 133t speak name to it and being hidden. This seems so weird as I've been to other locations with WPA setups and don't have this flapping problem.

But look @ these glorious ping times!

--- google.com ping statistics ---
6928 packets transmitted, 6853 received, 1% packet loss, time 35046118ms
rtt min/avg/max/mdev = 45.124/49.225/269.539/13.436 ms

I was seeing 100ms+ just to my router before. To google I'm averaging 45 now!

EDIT: Problem is still not solved. Just happened while trying to work from home. so its not WPA. It has been noticeably less frequent over the past 20hrs. It looked like it was fixed in fact. So now my only troubleshooting step is to try to run this from a live CD? I work from this netbook from home a lot of the time- so this is obviously not a solution. What else can I do?

Last edited by biomimetic; 10-04-2011 at 03:55 PM. Reason: updates and questions
 
Old 10-04-2011, 07:17 PM   #8
RockDoctor
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Probably has something to do with the wireless driver version. For a while, it was not unusual for me to be able to connect with Fedora and not with Ubuntu or vice-versa; haven't tried with Ubuntu for a while given that Fedora's been working. At times, Windows (XP) would work when neither Fedora nor Ubuntu would.

Obviously, a live CD is out (unless you've got a USB cd drive), leaving a a live USB flash drive as the most promising option.
 
Old 10-05-2011, 03:14 AM   #9
repo
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Quote:
So now my only troubleshooting step is to try to run this from a live CD?
See if it works with a live CD.
I would suggest puppy, they have great hardware support.
Perhaps you just need to upgrade the driver from your wireless as said by RockDoctor.

Kind regards
 
Old 10-06-2011, 10:21 AM   #10
biomimetic
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Registered: Aug 2011
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Thanks for all your help. Got a new router and said screw it. This was becoming more grief than it was worth.

Although I would like to know how to update my wireless drivers like it was suggested previously.
 
  


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