It seems a recent Ubuntu update has overwritten my /etc/modprobe.d/iwlwifi.conf re-enabling 11n.
Setting disable_11n=1 made this problem go away again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1405842 Title: Microcode SW error detected. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1405842/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs