Slow DNS Lookups in Firefox on Ubuntu 9.10 Karmic Koala
by Craig Mayhew on Nov.07, 2009, under Guides/Fixes, Linux/Ubuntu
Unfortunately the IPv6 issue is still at large in Karmic Koala and will effect just about every internet application.
The problem is caused by Ubuntu requesting everything by IPv6 first even if there are no IPv6 Interfaces configured and timing out each time when it doesn’t get a response.
The workaround in firefox is to go to “about:config”, just type it into the address bar and hit enter. Then change the value network.dns.disableIPv6 to TRUE.
The bug can be tracked here:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/417757
13 Comments for this entry
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Slow Firefox on Ubuntu 9.10 | malanciault.com
January 9th, 2010 on 12:44 pm[...] quick search on Google lead me to this: Slow DNS Lookups in Firefox on Ubuntu 9.10 Karmic Koala. I did exactly what was [...]
November 11th, 2009 on 9:38 pm
Thank You so much for posting this quick fix. I was able to find volumes of info about this bug but you are the only place I found that actually posted this easy workaround.
November 24th, 2009 on 3:46 am
worked! thanks! any danger in doing this?
November 27th, 2009 on 6:30 am
Maybe a dumb question, but same issue in Kubuntu? I tried this solution, but no luck- Look-ups still incredibly slow.
December 4th, 2009 on 1:38 am
@rodrigo There is no danger, as your router simply doesn’t support ipv6 and this is the reason Ubuntu hangs when trying to access the internet.
In an ideal world, Ubuntu should release a fix so it doesn’t wait for 20 seconds before trying ipv4 and ideally your router should be upgraded to support ipv6.
December 19th, 2009 on 10:00 pm
Very helpful thanks. That link says a fix has been released … I sure didn’t get it.
December 23rd, 2009 on 12:29 am
@Andrew At the present time there is no fix for Ubuntu, but there may be one further upstream. Hopefuly they will role it out quick because this is crippling and reflects very badly on ubuntu.
January 2nd, 2010 on 1:47 pm
Thanks a lot for your helpful comment! It fixed my problem straight away!
January 4th, 2010 on 4:39 am
Hey!
Thanks for this. Solved it for me.
January 8th, 2010 on 1:59 pm
Thanks!
Is this a problem in Firefox only or does this mean that other apps are affected too, f.i. apt-get and updates?
Google chrome seems to work as expected.
February 9th, 2010 on 8:44 pm
Excellent. Firefox seems much faster for me in Karmic. Thanks!
March 24th, 2010 on 2:43 am
Do you know if this bug has been fixed yet? I’m assuming it hasn’t as it’s still present in the beta of lucid lynx. I find it quite odd that jaunty worked fine with ipv6 yet karmic doesn’t it seems to more than just a problem with the dns routers themself but the way karmic request for ip addresses.
My situation is a bit different the ip returns 1.0.0.0 but it’s still a ipv6 prob as the firefox fix works i’ve encountered this before with other distros like debian, mandriva etc.
July 18th, 2010 on 6:20 pm
Thanks for this, spent ages seeking this for a eth0 connection issue on a fresh Revo 3610 / Ubuntu 10.04 install. Symptom – firefox site resolution timing out. Check DNS is ok by inserting a known good address 74.125.65.99 (Google). Followed the above instructions, defeated the dragons and we’re away.
December 1st, 2010 on 3:51 pm
What luck to come across this blog. Firefox was taking a good 5-6 seconds before it started to connect and load sites. Even in December 2010 on Ubuntu 10.04, this fix is GREAT!!
Thanks so much