This might be fixed in the Ubuntu 15.04 "Vivid Vervet" kernel 3.19.0-17.17 by this commit:
iwlwifi: fix max_ht_ampdu_exponent for older devices The diff file mentions your Intel Corporation Centrino Advanced-N + WiMAX 6250 2x2 AGN. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1319630 Title: 85% performance hit in iwlwifi from 12.04 to 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1319630/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
