With AVM Fritz!Box 4040 and OpenWrt 18.06 RC1 there are many kernel warnings
kern.warn kernel: [87771.917049] ath10k_ahb a000000.wifi: Invalid VHT mcs 15 peer stats
and there are disconnections when the connected clients are many, at the moment I tried with 16 clients on 2.4 GHz and 8 on 5 GHZ.
Firmware 10.4-3.5.3-00057 fixes these warnings and the problem of disconnections of some clients.
Signed-off-by: Massimo Tum <masnia@tiscali.it>