Originally Posted by reza.kashef
RMerlin: It is the ”adapting” part I’m interested in.
This has nothing to do with “downgrading” from 40 to 20MHz, neither with changing of the channel in auto mode.
I have 2 routers operating in the same neighborhood (roughly the same interference), one with FW .220 and the other with .260.
In the log file for the .220 router I see the entry all the times but never in the one running .260.
Asus has been experimenting with ways to make the router more stable under high interference environments. They added a new option to manually trigger that behaviour while they look deeper into the root issue - that's what the Enhanced Interference Management option under Wireless -> Professional will toggle how the router react if there's too much radio interference.
I'm not sure if that downgrade is related to the channel width or to switching to a different channel. If you have your router set to "Auto" for the channel selection, then that might be what you are seeing in the log - a switch to a less crowded channel. Unfortunately, I don't know enough about the lowlevels of the wireless driver itself to know for sure.