Public bug reported:

Ubuntu 16.04, several kernels (including 4.4.0-28, upstream 4.4.10 and
upstream 4.6.0)

Similar to
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575321/, but not
intermittent; The wifi driver just doesn't load at any time. Output from
dmesg:

[...]
brcmfmac 0000:03:00.0: Direct firmware load for brcm/brcmfmac43602-pcie.txt 
failed with error -2
...
brcmf_cfg80211_reg_notifier: not a ISO3166 code

There is no file brcmfmac43602-pcie.txt anywhere on the system. However,
/lib/firmware/brcm/brcmfmac43602-pcie.bin does exist.

Iw reg get outputs:
sudo iw reg get
country DK: DFS-ETSI
        (2402 - 2482 @ 40), (N/A, 20), (N/A)
        (5170 - 5250 @ 80), (N/A, 20), (N/A)
        (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS
        (5490 - 5710 @ 160), (N/A, 27), (0 ms), DFS
        (57000 - 66000 @ 2160), (N/A, 40), (N/A)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-28-generic 4.4.0-28.47
ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
Uname: Linux 4.4.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  lars       2010 F.... pulseaudio
 /dev/snd/controlC0:  lars       2010 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Jul 10 19:41:18 2016
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=a45b9984-4de8-49e3-ba57-a98ae560ad61
InstallationDate: Installed on 2016-01-30 (162 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Apple Inc. MacBookPro12,1
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-28-generic.efi.signed 
root=UUID=d3ba9d27-321b-45cb-99f2-776b10c1dc7a ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-28-generic N/A
 linux-backports-modules-4.4.0-28-generic  N/A
 linux-firmware                            1.157.2
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-04-22 (78 days ago)
dmi.bios.date: 10/26/2015
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP121.88Z.0167.B15.1510261437
dmi.board.name: Mac-E43C1C25D4880AD6
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro12,1
dmi.chassis.type: 9
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-E43C1C25D4880AD6
dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP121.88Z.0167.B15.1510261437:bd10/26/2015:svnAppleInc.:pnMacBookPro12,1:pvr1.0:rvnAppleInc.:rnMac-E43C1C25D4880AD6:rvrMacBookPro12,1:cvnAppleInc.:ct9:cvrMac-E43C1C25D4880AD6:
dmi.product.name: MacBookPro12,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1600624

Title:
  MacBook wifi doesn't work (brcmfmac)

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