lts-vivid kernel has IWL8000_UCODE_API_MAX=12, but only iwlwifi-8000C-13.ucode shipped

[Jason Gerard DeRose]

Intel 8260 WiFi cards currently aren't usable on 14.04.3 (with lts-vivid HWE, 3.19 kernel).

The problem is that in the kernel, iwl-8000.c defines an IWL8000_UCODE_API_MAX of 12:

#define IWL8000_UCODE_API_MAX 12

But /lib/firmware/iwlwifi-8000C-13.ucode is the only 8000 series firmware currently shipped in linux-firmware.

So either iwlwifi-8000C-12.ucode needs to be added to linux-firmware, or IWL8000_UCODE_API_MAX needs to be bumped to 13 in the kernel (possibly with other changes in the iwl-8000 driver needed to actually make it work with firmware API 13).

Thanks!

[Seth Forshee (sforshee)]

To my knowledge Intel never publicly released a -12 ucode file for this hardware. The first version to appear in upstream linux-firmware was -13.

[Jason Gerard DeRose (jderose)]

Seth,

Gotcha, thanks! So is the expectation then that 8260 WiFi cards wont be usable on Trusty till 14.04.4 (lts-vivid HWE)?

[Seth Forshee (sforshee)]

Yes, 14.04.4, but that's the lts-wily HWE kernel (which I'm sure is what you meant). Intel didn't bump the ucode API version in iwlwifi to 13 upstream until 4.1.

[Jason Gerard DeRose (jderose)]

Ah, yes, I meant the lts-wily HWE stack. Thanks!