[FS#1245] [Netgear R7800] 2.4GHz wifi stuck at 20MHz (40 MHz channel width doesn't work)

[LEDE Bugs]

The following task has a new comment added:

FS#1245 - [Netgear R7800] 2.4GHz wifi stuck at 20MHz (40 MHz channel width doesn't work)
User who did this - Sven Schönhoff (IronicSven)

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I've meant "Status" > "System Log".

You can force 40 Mhz with the noscan option: https://wiki.openwrt.org/doc/uci/wireless

But keep in mind that turning this on might violate regulatory requirements.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1245#comment4232