From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from sabertooth01.qualcomm.com ([65.197.215.72]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WXqcH-0006v1-G9 for ath10k@lists.infradead.org; Wed, 09 Apr 2014 11:24:30 +0000 From: Kalle Valo Subject: Re: ath10k FAQ References: <8761mkmfny.fsf@kamboji.qca.qualcomm.com> Date: Wed, 9 Apr 2014 14:24:02 +0300 In-Reply-To: (Avery Pennarun's message of "Tue, 8 Apr 2014 19:56:36 -0400") Message-ID: <87zjjuiw4t.fsf@kamboji.qca.qualcomm.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: Avery Pennarun Cc: ath10k Avery Pennarun writes: > On Tue, Apr 8, 2014 at 3:41 AM, Kalle Valo wrote: >> I created a small FAQ to the wiki and added the four questions which >> seem to be popular: >> >> http://wireless.kernel.org/en/users/Drivers/ath10k/faq >> >> Comments welcome. And feel free to update it with new questions. > > This seems helpful. Especially for me as now I can just answer with an URL ;) > For the first question ("can't set channel") I think the provided > answer is not the only cause of the problem, and was not the one that > confused me at first. For me, the main confusion was that it's pretty > non-intuitive how to set the 80 MHz center frequency in hostapd.conf > ("the center frequency of the channel 6 higher than the lowest channel > number in the 4-channel group"). It might help if you could include an > example for that. I guess it varies by country so it might be a little > tricky. Good point. I tried to improve the answer a bit now: ---------------------------------------------------------------------- Why I cannot start an AP in an 80 MHz channel / in 11ac mode? If you get "nl80211: Failed to set channel" error from hostapd, most likely that means that regulatory database doesn't support 80 MHz channels (which were introduced in 11ac). You can check that with iw: $ iw reg get country FI: DFS-ETSI (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 80), (N/A, 20) (5250 - 5330 @ 80), (N/A, 20), DFS (5490 - 5710 @ 80), (N/A, 27), DFS (57240 - 65880 @ 2160), (N/A, 40), NO-OUTDOOR If you do not see "@ 80" within the frequency range you are using, it means that the regulatory database doesn't support 80 MHz channels. Other problem is that configuring VHT (= 802.11ac) in hostapd is not very intuitive, pay extra attention how you configure it. Especially vht_oper_centr_freq_seg0_idx is challenging. See example configuration and hostapd configuration file documentation. ---------------------------------------------------------------------- I'm trying to maintain all configuration related documentation in respective pages and that's why I just have pointers in the FAQ. -- Kalle Valo _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k