RT-AC66U bandwidth and control channel settings not working

[glugglug]

I have 3 Asus routers, 2 AC66U and a new AC68U. After flashing and setting up the AC68U, I updated my AC66U's to the latest Merlin firmware (3.0.0.4.376.45). After doing this, I can effectively no longer select the channel or bandwidth in the wireless settings on both AC66Us. Whatever I select it goes back to 20Mhz/Auto after I hit apply on both the 2.4GHz and 5GHz settings. Also on the 5GHz settings it sometimes shows the guest network instead of the main 5GHz network until I hit one of the SSID links at the top.

I tried flashing back to 3.0.0.4.374.43 and that did not solve this issue. Neither did flashing to the official Asus firmware instead of the Merlin version. I'm guessing I need to reset the routers to defaults after the switch between 374 and 376 versions, but I'd really rather not do this as I have a good amount of custom configuration on the one acting as main router rather than an access point, and this pretty much must be done late at night as otherwise people are trying to watch TV streamed from the PC. Any trick I am missing to fix this issue?

 

[glugglug]

Ended up going back to factory defaults to get the settings working again, and using 374.43.

 

[Grisu]

I have to activate Guest network first, change WEP to anything else, than deactivate Guest again.
Afterwards it takes the settings in 2,4GHz regulary WLAN ...

Lot of work each time I need WEP in Guest.

Posted the problem here:
http://forums.smallnetbuilder.com/showthread.php?t=19168

Grisu

 

[Deleted member 22229]

Ended up going back to factory defaults to get the settings working again, and using 374.43.

You should be using this build if you want to run 374.43 it is the same as Merlins but has all the security updates of 376.45 and i can say with out a doubt it works well.

http://forums.smallnetbuilder.com/showthread.php?t=18914