Further to my comments #23 above, I have now found that this card is
working well. I was initially fooled by the bitrate going to 1mb/s
whenever there is no data transfer. When data is moving it reaches
around 200mb/s (n type AP) and stays there. I have not seen this
behaviour with other wifi cards which seem to display a constant bitrate
regardless of what's going on.

It seems to be loading a default/fallback firmware that works well but
is still missing out on the direct load - see below

brian@lap2u1510:~$ dmesg |grep iwlwifi
[    9.226439] iwlwifi 0000:07:00.0: Direct firmware load for 
iwlwifi-7260-15.ucode failed with error -2
[    9.229221] iwlwifi 0000:07:00.0: Direct firmware load for 
iwlwifi-7260-14.ucode failed with error -2
[    9.235296] iwlwifi 0000:07:00.0: loaded firmware version 25.30.13.0 op_mode 
iwlmvm
[    9.307214] iwlwifi 0000:07:00.0: Detected Intel(R) Dual Band Wireless AC 
7260, REV=0x144
[    9.307283] iwlwifi 0000:07:00.0: L1 Disabled - LTR Disabled
[    9.307525] iwlwifi 0000:07:00.0: L1 Disabled - LTR Disabled
[    9.591407] iwlwifi 0000:07:00.0 wlp7s0: renamed from wlan0
[   10.470015] iwlwifi 0000:07:00.0: L1 Disabled - LTR Disabled
[   10.470248] iwlwifi 0000:07:00.0: L1 Disabled - LTR Disabled
[   10.677804] iwlwifi 0000:07:00.0: L1 Disabled - LTR Disabled
[   10.678035] iwlwifi 0000:07:00.0: L1 Disabled - LTR Disabled

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https://bugs.launchpad.net/bugs/1527444

Title:
  Intel 7260 Wifi not working on Ubuntu 15.10

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