[FS#873] problems of mt7628 wifi driver on miwifi nano

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - nqsnqs (nqsnqs) 

Attached to Project - LEDE Project
Summary - problems of mt7628 wifi driver on miwifi nano
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details -  I started using lede on my miwifi nano since the release of version 17.01.1. All function works well except its wireless function. 

What makes it a problem is its stability. After a random period of time(ranging from a quarter of an hour to half of a day), it suddenly disconnected. If you try to reconnect, my device shows something like "setting the network address"(varing from devices to devices). After reboot, I found something like "deauthenticated due to inactivity (timer DEAUTH/REMOVE)".  Unfortunately, I haven't found a way to reproduce the problem till now.

I thought there might be bugs on its wireless driver because on another firmware(http://downloads.pandorabox.com.cn/pandorabox/Xiaomi-Mini-R1CL/firmware/PandoraBox-ralink-mt7628-xiaomi-r1cl-squashfs-sysupgrade-r1752-20151201.bin) which is a variant of Openwrt, it works well.

There are many other problems like the inability to set channel to auto and the txpower option is of no use. But for my daily use, they may not so important compared to the connectivity problem.

Sorry for my bad English and thank you for fixing it.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=873