[Bug 788274] Re: dns lookup issue on wireless: firefox& chromium-bowser take very long to load on Ubuntu Narwhal

[gene]

** Summary changed:

- dns lookup issue:  firefox& chromium take very long to load  on Ubuntu Narwhal
+ dns lookup issue on wireless:  firefox& chromium-bowser take very long to load  on Ubuntu Narwhal

** Description changed:

  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.
+ In all of these firefox 7, chromium, epiphany and konqueror are pretty fast, except on Narwhal when visiting some websites
  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
+ 0) never happened on the affected laptop before 11.04
+ 1) pages without js are rendered alright
+ 2) 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)
+ 3) w3m-img,elinks,lynx are fast and load those pages in questions alright
+ 4)none of these problems exist on 10.04 or 10.10 with web browsers of the same versions
+ 5) it is an Ubuntu 11.04 only issue, does not happen on older version of Ubuntu
+ 6) 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
  --- 
  Architecture: i386
  DistroRelease: Ubuntu 11.04
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Tags:  natty
  Uname: Linux 3.1.0-rc6-mine+ i686
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: Upgraded to natty on 2011-05-06 (160 days ago)
  UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin netdev plugdev powerdev scanner video voice

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https://bugs.launchpad.net/bugs/788274

Title:
  dns lookup issue on wireless:  firefox& chromium-bowser take very long
  to load  on Ubuntu Narwhal

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