So unfortunately I solved the issue by switching to an Intel 7260 card, which has been working great using the default kernel, firmware, etc.
We can close this, and thanks to Seth for your assistance. :) Sorry I couldn't provide any useful information for anyone else to benefit from. :/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1602051 Title: 5Ghz link no longer works on 16.04 - iwlwifi Status in linux-firmware package in Ubuntu: Incomplete Bug description: Gone from 15.04 to 15.10 on a media PC, constantly streaming movies on the 5Ghz since some get choppy on 2.4Ghz. Has worked beautifully for well over a year now on both 15.x releases. Decided to take the plunge to 16.04, and things were good at first, but I believe there was a firmware update that broke 5Ghz support. After a update (then a reboot), I could (grudgingly) connect to my 5Ghz network, but throughput would drop like a rock even on an apt update/upgrade, to the point where it would stop responding entirely. Had a thought regarding firmware, and decided to force an older rev, so I copied the newest from /lib/firmware/ (iwlwifi-3160-16.ucode) to a backup location and removed it from /lib/firmware/ which forced use of the next newest firmware, iwlwifi-3160-16.ucode, to be loaded. After a reboot, the difference is night and day - no problem connecting to my 5Ghz network again, and throughput is as expected for a solid 5Ghz connection. This is the AC version of this card (first one listed here): https://wikidevi.com/wiki/Intel#abgn.2Bac ``` ~:$ lspci -nn | grep -i intel 02:00.0 Network controller [0280]: Intel Corporation Wireless 3160 [8086:08b3] (rev 83) ``` This is an up to date 16.04, running kernel 4.4.0-28-generic, linux- firmware version 1.158 (although this occurred on 1.157 as well). I'm happy to output more info if needed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1602051/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
