761176 has more people still affected by this. I followed the idea in that bug to try the ppa kernel - Looks like the fix is in there.. I'm back to >5 MB/sec on 802.11n links with it.
$ uname -a apt history for the upgrade Start-Date: 2011-05-27 20:01:03 Commandline: apt-get dist-upgrade Install: linux-image-2.6.39-0-generic:amd64 (2.6.39-0.5~20110427), linux-headers-2.6.39-0:amd64 (2.6.39-0.5~20110427, automatic), linux-headers-2.6.39-0-generic:amd64 (2.6.39-0.5~20110427, automatic) Upgrade: linux-generic:amd64 (2.6.38.8.22, 2.6.39.0.1~20110419), linux-headers-generic:amd64 (2.6.38.8.22, 2.6.39.0.1~20110419), linux-image-generic:amd64 (2.6.38.8.22, 2.6.39.0.1~20110419) End-Date: 2011-05-27 20:03:30 apt-cache policy linux-image linux-image: Installed: (none) Candidate: 2.6.39.0.1~20110419 Version table: 2.6.39.0.1~20110419 0 500 http://ppa.launchpad.net/kernel-ppa/ppa/ubuntu/ natty/main amd64 Packages 2.6.38.8.22 0 500 http://archive.ubuntu.com/ubuntu/ natty/main amd64 Packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/735171 Title: driver ath9k is too slow or not responding -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs