Trouble with 802.11ac from a WLE900VX card (QCA9880 ath10k)

[Brad Chesney]

Well, sports fans-- it seems when you stop hostapd, it isn't enough to
release whatever previously registered the authentication frames. This
stops my hostapd service start from failing-- so I am going to mark it
as the answer.

    apt install psmisc
    killall hostapd

    root at gate:/etc/hostapd# service hostapd stop && echo
"=================================================================="
&& hostapd -dddddB /etc/hostapd/wlp6s0.conf

Bing, bang, boom I get a connection! ...at 54mbps. So, still not
right. Better, functionalish. But, no cigar. Seems to need more
cowbell.

Where did you get the hint to do that? I'll tell you. So, I found this
mailing list post from 2012:

>On 08/11/2012 07:39 AM, Jouni Malinen wrote:
>> On Wed, Jul 11, 2012 at 02:21:40PM -0700, Ben Greear wrote:
>>> Kernel is 3.3.8+, hostapd is from a few days ago.  Any idea
>>> why this is failing?
>>
>>> 1342041584.536008: nl80211: Subscribe to mgmt frames with AP handle 0x9a97900
>>> 1342041584.536052: nl80211: Register frame type=0xb0 nl_handle=0x9a97900
>>> 1342041584.536075: nl80211: Register frame match - hexdump(len=0): [NULL]
>>> 1342041584.536177: nl80211: Register frame command failed (type=176): ret=-114 (Operation already in progress)
>>> 1342041584.536201: nl80211: Register frame match - hexdump(len=0): [NULL]
>>> 1342041584.536263: nl80211: Failed to set interface vap0 into AP mode
>>
>> The driver did not seem to accept the request to register for processing
>> Authentication frames due to something else had already registered for
>> those. Did you have some other interfaces running as an AP at the same
>> time?
>
>Yes, that seemed to be the problem.  I had some stale hostapd processes running.  I'm killing them harder now..and haven't seen any problems
lately.
>
>Thanks,
>Ben

Now, that it "works" and I understand why my hostapd service start was
failing, I need to move on to a correct configuration it. Progress!!!

Take Care,
-Brad Chesney
bradchesney79 at gmail.com
(440)954-0151 - Mobile