I can confirm the problem, and also tried to update the kernel to 3.17.3 and use the latest driver 23.11.10.0, but the speed was still much lower than using the 22.24.8.0 so I reverted back. Hope it is resolved.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1289961 Title: 8086:08b2 [Lenovo ThinkPad T440s] Power management causes Intel wifi 7260 slowness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1289961/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs