Sorry, it's my fault, everything works fine, I did forget to install backport modules, so I can say this bug is finally solved.
** Changed in: linux-backports-modules-2.6.28 (Ubuntu) Status: Confirmed => Fix Released -- [ Wifi card Intel Pro 4965 ] throughput < 100 kBps on 802.11b network https://bugs.launchpad.net/bugs/236212 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs