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Subject: Re: [PATCH] mac80211: disable u-APSD queues by default
From: Johannes Berg <johannes@sipsolutions.net>
To: Krishna Chaitanya <chaitanya.mgit@gmail.com>
Cc: Michal Kazior <michal.kazior@tieto.com>,
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Date: Tue, 03 Mar 2015 10:36:58 +0100
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> >> Cisco 4410N originally forced us to enable VO by
> >> default only because it treated non-VO ACs as
> >> legacy.

> Mixed mode (uapsd + legacy) is not really the optimal
> configuration, where we expect STA to send trigger frames periodically
> to retrieve the DL packets (especially very first packet).
> 
> But still if we want power save, i suggest going for
> All u-apsd (0xF), so that AP will inform us by setting the TIM bit
> and we can retrieve the first frame.
> (We have this patch internally and it works well).

Except where it doesn't work, like on the Cisco 4410N - see above.

johannes