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Obvious issue with these images so far seems to be the WLAN-LEDs, they just won't stop blinking after WLAN is activated. Also I cannot tell, if DFS ist working for 5-GHz. And of course the device reports itself as V4, as I didn't create an extra profile for V6.

Hi again! The WLAN-LEDs stop blinking after a while and get lit solidly. I guess, they might work correctly and the blinking is for some good reason which I just don't see... Maybe DFS-sensing or something like that So tending to call it "works as it should". After some reading of bootlogs from V4 and my own V6 I see same flash partitions and started creating a hardware profile locally using the DTS-file of V4, as I expected GPIOs/LEDs and Flash to act just identically, which seems to be the case (besides V6 has just 5 LEDs, WPS-LED ist missing). I can change color of the WAN-LED between orange and green, WAN, LAN, Power, WLAN-5 and WLAN-2 seem to work as expected. WLAN- and RESET-Buttons work, too. I created this profile on top of OpenWRT 21.02.0-RC4 with updated mt76-driver. In some files (platform.sh, etc.) where there are case decisions made for networking, leds etc. I added the V6 to be handled the same ways as V4. The MAC Address of BR-LAN matches the one at the label of the bottom of the device. WLAN-2 an WAN also have this same MAC, only WLAN-5 is different. Is this expected? If not, what should / can I do about this? I must admit, that this kind of work is not one of my talents, but I'll do my very best.

My concerns regarding DFS on the 5GHz mainly foot on this thread in the forum. Reading the syslog I noticed that after configuring the 5GHz it wouldn't start due to initialization failure related do DFS, while showing ENABLED state in LuCIs wireless section. WPS didn't work then either (using wpad-openssl). Restarting the wireless device couldn't resolve this, but rebooting the whole router did. So after configuring the AP it is a good idea to reboot the router. Indeed I tend to call this a MT7613-driver issue, not a "create-support-for-C50-V6"-issue... When the 5GHz ist up, it works quite well for my "home use", meaning: I did some speedtests, but no excessive stress tests with Iperf for several hours or something like that.

What can I do next to help creating Support for the V6? What has to be reviewed, tested, handed over to somebody with more knowledge and competence?

This thread in developer's part of the forum is closed, so I cannot provide these information there to possibly draw somebodys attention.

Best regards!

Edit: Today I needed several reboots to get 5GHz up and running. Syslog looked like this:

Edit 2: Seems like channel 149 is more likely to succeed than others. I might change to a manually chosen channel instead of AUTO...