WiFi channels 12 & 13

I bought a new MacBook Pro 13 Retina (early 2015) and installed Windows 8.1 under BootCamp.

I cannot connect to a WiFi APN at work - the access point is not visible.

Admins told me they are using channels 12 and 13 of the 2.4GHz wave (11n mode).

I have rebooted into OS X and it connects happily. Back to BootCamp and Windows just does not see the APN.

They say it is a driver issue in BootCamp. I have tried all sensible options in the Advanced driver settings under Windows but no go.

Admins are reluctant to change channels just for us Mac guys, since 1-11 are very busy and they say performance will drop to half if not worse.

How do I fix this?

How do I file a bug on bootcamp drivers?

MacBook Pro with Retina display, Windows 8, early 2015, 13inch

Posted on Aug 11, 2015 6:56 AM

Reply
10 replies

Aug 11, 2015 9:11 AM in response to cubeover

You did not say what country you are in so here are the 2.4 GHz channels available. Table from https://en.wikipedia.org/wiki/List_of_WLAN_channels.

Channel

Frequency
(MHz)
North America
[5]
Japan[5] Most of world
[5][6][7][8][9][10][11]
1 2412 Yes Yes Yes
2 2417 Yes Yes Yes
3 2422 Yes Yes Yes
4 2427 Yes Yes Yes
5 2432 Yes Yes Yes
6 2437 Yes Yes Yes
7 2442 Yes Yes Yes
8 2447 Yes Yes Yes
9 2452 Yes Yes Yes
10 2457 Yes Yes Yes
11 2462 Yes Yes Yes
12 2467 NoB Yes Yes
13 2472 NoB Yes Yes
14 2484 No 11b onlyC No

Aug 11, 2015 4:02 PM in response to cubeover

Try this, the exact locations/keystrokes may be different for Windows 8.1 but it will get you going in the right direction.


In Windows open 'Control Panel' and go into 'Networking and Sharing Center' then select 'Manage wireless networks' and click on 'Adapter properties', click on 'Configure' and then click on and then click on 'Advanced' then select 'Country Region (2.4GHz)' and in the Value Box Select '#1(1-13)'.

Aug 11, 2015 4:03 PM in response to cubeover

You can download a free version of Acrylic WiFi (a WiFi scanner) and check if the radio, when booted in Windows, can see the AP and RF. If it can, you may want to download Wireshark and capture the RF beacons and WLAN packets using filters to see if it is the RADIO layer of a different issue with DHCP layer. LaPastenague is in Melbourne and may also have some insight. You may also want to post in the AirPort discussions.

Aug 12, 2015 2:28 AM in response to BobTheFisherman

Hi Bob

unfortunately there is nothing related to "Country" nor "Channels" (except ad-hoc channel that don't apply in this case).

30 other settings exist but I have tried many combinations to no avail.


See my settings and comments below:

hopefully someone from BroadCom can figure?


- 20/40 Coexistance = Auto APN is 20/40

- 40MHz Intolerant = Disabled APN is 20/40

- 802.11h+d = Loose 11h no idea

- 802.11h Preable =Auto no idea

- Antenna Diversity = Auto

- AP Compatibility Mode = Higher Performance tried Broader Compatibility

- ARP Offload = Enabled no applicable 'cause layer1 is not up anyway

- Associated Roaming Preference = Disabled not applicable, not a roaming issue

- Band Preference = Prefer 802.11b/g who wants to prefer 11a these days?

- Bandwidth Capability = 11a/b/g:20/40MHz

- BeamForming = Enabled tried disabling

- BlueTooth Collaboration = Enable WTH? But tried disabling

- BSS PLCP = Auto (Short/Long) no idea

- BT-AMP = Disabled

- Disable Bands = 802.11a I mean it

- Disable Upon Wired Connect = Disabled there no wired BCM anyway

- Fragmentation Threshold = 2346

- IBSS 54g(tm) Protection Mode = Auto

- IBSS mode = 802.11a/b/g/n Auto

- Locally Administered MAC Address = Not Present but wow, not seen in years

- Minimum Power Consumption = Disabled

- Mixed Cell Support = Enabled

- NS Offload = Enabled

- Power Ouput = 100%

- Priority and VLAN = Disabled

- Rate (802.11a) = Best Rate

- Rate (802.11b/g) = Best Rate

- Roam Tendency = Auto

- Roaming Decision = Auto

- RTS Threshold = 2347

- Short GI = Auto no idea

- Wake On Magic Packet = Disabled no hpottery here

- Wake on Pattern Match =Disabled

- WiFi Rekeying Offload = Enabled hopefully not overseas

- WMM = Auto

- WZC IBSS Channel Number = 157 (40MHz-L)

- XPress (TM) Technology = Disabled tried enabling


Driver Provider = Broadcom

Driver Date = 12/03/2015

Driver Version = 7.35.118.32

Aug 12, 2015 8:06 AM in response to Loner T

This is a bootcamp driver issue. (OS X shows 802.11n Channel 13, 20MHz, 130Mbit bandwidth, Country=GB)

There are dozens of devices on that APN and all was fine for a couple of years.

Actually, another guy with a last year's MBP also had issues, although intermittent. He eventually bought an ethernet dongle thingie. Another MBP user uses Parallels to sidestep sub-par Apple BootCamp drivers. IMO Apple should compensate them extra purchases.

Me, I am going to return my Mac this week.

Four keys to simulate one INS is a bit much. (reduced-down keyboard is a separate issue)

I was also stung by Apple proprietary approach to their USB DVD drive. Works only with a Mac. Wow.

Aug 12, 2015 8:43 AM in response to Loner T

I want Windows to use AU. All 38 odd devices are OK with that APN and regional settings, even MacOS X on the same laptop.

GB actually allows channels 12 and 13, have a look at Bob's diagram above.

All I want is an advice on how to submit this as a bug, or how to get an ear of someone who can do this.

But away it goes, anyhow - I cannot wait even a week. This may be months before Apple fixed this.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

WiFi channels 12 & 13

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