On Tue, Mar 3, 2015 at 3:06 PM, Johannes Berg <johan...@sipsolutions.net> wrote:
>
>> >> 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.
But for that single AP, we are forced to lose efficient power savings
unless user configured explicitly.
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