Well, it got a little annoying. I did a few tests with two types of configurations in /etc/nsswitch.conf 1) it is either hosts: files mdns4_minimal [NOTFOUND=return] dns or 2) hosts: files dns
I also have the following in the /etc/resolv.conf : #long lookup options single-request # Generated by NetworkManager nameserver 192.168.1.1 #long lookup options timeout:1 Sometimes even a simple google search can hang up for a while. However, one of the slowest sites I noticed is cnews.ru . I am attaching tcpdumps below. The command "tcpdump -n -i wlan0 port 53" is used here. First with 1) hosts: files mdns4_minimal [NOTFOUND=return] dns ** Attachment added: "slowff.tcpdump" https://bugs.launchpad.net/bugs/788274/+attachment/2472389/+files/slowff.tcpdump ** Attachment added: "w3m.tcpdump" https://bugs.launchpad.net/bugs/788274/+attachment/2472390/+files/w3m.tcpdump ** Attachment added: "elinks.tcpdump" https://bugs.launchpad.net/bugs/788274/+attachment/2472391/+files/elinks.tcpdump ** Attachment added: "slowep.tcpdump" https://bugs.launchpad.net/bugs/788274/+attachment/2472392/+files/slowep.tcpdump ** Attachment added: "slowchrome.tcpdump" https://bugs.launchpad.net/bugs/788274/+attachment/2472393/+files/slowchrome.tcpdump -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/788274 Title: dns lookup issue: firefox& chromium take very long to load on Ubuntu Narwhal Status in “chromium-browser” package in Ubuntu: New Status in “firefox” package in Ubuntu: New Status in “kdebase” package in Ubuntu: New Bug description: I have 3 PCs with different Ubuntu versions 10.04, 10.10 and 11.04. In all of these firefox4, chromium, epiphany and konqueror are pretty fast, except on Narwhal when visiting web pages with javascript. I noticed that on 11.04: 1) it happens on all js-capable browsers 2) pages without js are rendered alright 3) when js is disabled on firefox4 it seems to speed up some not all, though, e.g. it does for cnews.ru, but not for launchpad.net (which never loads) 4) w3m-img,elinks,lynx are fast and load those pages in questions alright 5)none of these problems exist on 10.04 or 10.10 with web browsers of the same versions 6) it is an Ubuntu 11.04 only issue, does not happen on older version of Ubuntu 7) does not seem to be an ipv4/ipv6 issue, since on firefox I set ipv6.disable to true On the affected machine (as well as on the others) I got a custom kernel installed. uname -a: Linux 2.6.38.5-mine #1 SMP Wed May 4 12:28:50 CDT 2011 i686 i686 i386 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/788274/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
