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I am running Ubuntu 14.04 on a 2015 Macbook Pro. I am able to see and connect to other wifi networks via the network manager. I have set up a 5GHz network with security disabled on the AC1750 router. I am able to connect to the network on another device (an Intel NUC also running Ubuntu 14.04). However, on my Macbook the network does not appear on the list of networks in the network manager, nor am I able to connect to it as a hidden network. Additionally, I've tried rebooting my computer and configuring /etc/network/interfaces to connect to the network to no avail.

Here is the output of sudo lshw -C network:

*-network               
       description: Wireless interface
       product: BCM43602 802.11ac Wireless LAN SoC
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 01
       serial: 00:90:4c:0d:f4:3e
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=brcmfmac driverversion=n/a firmware=01-e4dc15b ip=128.31.35.31 latency=0 multicast=yes wireless=IEEE 802.11bgn
       resources: irq:62 memory:c1400000-c1407fff memory:c1000000-c13fffff

The 5GHz wireless network is in 11a/n/ac mixed mode and SSID broadcast is enabled (configured through the router settings). Note that the lshw output above has wireless=IEEE 802.11bgn in the capabilities field, whereas the NUC that is able to connect has wireless=IEEE 802.11abgn - perhaps this is related to the issue?

I tried installing a proprietary driver with sudo apt-get install bcmwl-kernel-source as per an answer to this question, but that left me unable to connect to any wireless networks.

Community
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MattG
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1 Answers1

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Are you sure you have a 5GHz card?
if Mermoy serves, You should have 802.11ac for 5GHz, as I seem to remember wireless=IEEE 802.11bgn is for 2.4GHz and the other NIC is wireless=IEEE 802.11abgn that has the 'a' for 5GHz

802.11a - 54 Mbps standard, 5 GHz signaling (ratified 1999), but elsewhere it is stated the 54 Mbps standard is for 2.4GHz

802.11g - 54 Mbps standard, 2.4 GHz signaling (2003)

802.11ac is the specification for 5GHz
The newest generation of Wi-Fi signaling in popular use, 802.11ac utilizes dual-band wireless technology, supporting simultaneous connections on both the 2.4 GHz and 5 GHz Wi-Fi bands. 802.11ac offers backward compatibility to 802.11b/g/n and bandwidth rated up to 1300 Mbps on the 5 GHz band plus up to 450 Mbps on 2.4 GHz
RE: https://www.lifewire.com/wireless-standards-802-11a-802-11b-g-n-and-802-11ac-816553
James Niland

James N.
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