[FS#4178] Netgear R6350 5Ghz wifi max power up to limit of only 6 dbm

[OpenWrt Bugs]

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

User who did this - iditsuda (iditsuda) 

Attached to Project - OpenWrt/LEDE Project
Summary - Netgear R6350 5Ghz wifi max power up to limit of only 6 dbm
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details - After upgrading from factory img to 21.02 as well as 19.07, Netgear R6350 Wireless settings page for 5Ghz wlan limits max power to only 6 dbm.  The reason is this device carries a partition table that takes into account bad blocks on the NAND flash. The partition table, however, isn't read by vanilla OpenWrt. As such, EEPROM offsets might vary between devices (so far only the two sets of locations are 
known to be used though). 

Also reported in 
https://forum.openwrt.org/t/netgear-r6350-max-power-for-5ghz-lower-after-upgrading-to-21-02-rc1/97753/16
and 
https://forum.openwrt.org/t/netgear-r6850-very-low-transmit-power-on-5ghz/90984/2

A simple solution for affected users is to modify the memory address manually in the DTS and build a new image. Unfortunately the posted builds for 0x8000 and 0x28000, but my device was starting at 0x48000. 

Finally, user Boromini at forum.openwrt.com built an r6850 image with the Sercomm patches
https://volatilesystems.org/dl/lede/targets/r6850/sercomm_parser_patches/

This build is based on master bf4aa0c6a2 and uses the Sercomm partition parser patch set from
OpenWrt patchwork.
+ https://patchwork.ozlabs.org/project/openwrt/patch/20210225201800.2478284-2-jan@3e8.eu/
+ https://patchwork.ozlabs.org/project/openwrt/patch/20210225201800.2478284-3-jan@3e8.eu/

I tested this build on my R6350, which effectively turned it into an R6850, and fixed the max power limit problem. 

Please consider accepting this patch into openwrt. 

Thank you.




   

 

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=4178

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