i'm running 380.57 build and just started using qos . after doing so my 2.4ghz internet doesn't work, im connected but still. my 5ghz works perfectly fine. i would have to reboot couple of times after disabling qos.
2.4ghz works when I'm using Adaptive QoS.I think we need a STICKY for this, this question came back everydays since this release because peoples dont read the fisrt lines of the 380.57 tread
From Merlin:
A factory default reset is required specifically for the RT-AC68U, due to the switch to a new SDK + wireless driver. Some people reported having issues with the 2.4 GHz band with this new SDK - if that's your case, the only solution at this time is to revert back to 378.56_2.
http://www.snbforums.com/threads/asuswrt-merlin-380-57-is-now-available.29308/page-3
If you using QoS,Adaptive QOs , IP monitor,... NAT will be disabled and 2.4ghz broken
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