Confirmed, http://people.canonical.com/~apw/lp621265-natty/ fixes the problem for me:
Linux spdy 2.6.38-4-generic #31~lp621265v201102161335 SMP Wed Feb 16 13:37:55 UTC 2011 i686 GNU/Linux 12.38 Mb/s from speedtest.net vs the maverick kernel: Linux spdy 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21 17:40:48 UTC 2011 i686 GNU/Linux 0.69 Mb/s (repeatedly) from speedtest.net nicholas@spdy:~$ lspci -vnn | grep -A 1 Wireless 03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4227] (rev 02) Subsystem: Intel Corporation ThinkPad R60e/X60s [8086:1011] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/621265 Title: Slow Wireless Connection in Intel 3945abg -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs