[Solved] OpenWrt on MT7621/MT7615N devices with 5GHz problems

Thanks for the reply.

Does the patch rely/expect on software and hardware flow offloading to be enabled?

I ask, since I don't bother enabling either of them; ISP plan does not exceed 500 Mb/s.

No, enabling hardware offload is not necessary. However, I've seen much better performance when it is enabled. If you'd like to keep it off, it will still perform better with the patch. Though, I'd suggest you enable it.

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Will test with software & hardware flow offloading enabled then.

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For those interested,
Another release candidate 22.03.0-rc5 listed available for MT7621 routers.

Just advance warning:
I encountered 5 GHz WiFi errors with release candidates 1 to 4.
Currently testing arinc9's patch release, so unable to test release candidate 5.

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i've tested this release using my 1T1R device, the performance still bad but at least now it performs better. No complaints with more than 1 stream devices, it just perform normally.

[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.01 sec 256 KBytes 2.08 Mbits/sec
[ 4] 1.01-2.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 2.00-3.01 sec 1.00 MBytes 8.32 Mbits/sec
[ 4] 3.01-4.01 sec 1.12 MBytes 9.47 Mbits/sec
[ 4] 4.01-5.01 sec 1.50 MBytes 12.6 Mbits/sec
[ 4] 5.01-6.00 sec 640 KBytes 5.25 Mbits/sec
[ 4] 6.00-7.01 sec 1.00 MBytes 8.35 Mbits/sec
[ 4] 7.01-8.01 sec 384 KBytes 3.14 Mbits/sec
[ 4] 8.01-9.01 sec 896 KBytes 7.36 Mbits/sec
[ 4] 9.01-10.01 sec 128 KBytes 1.05 Mbits/sec


[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.01 sec 6.88 MBytes 5.76 Mbits/sec sender
[ 4] 0.00-10.01 sec 6.73 MBytes 5.64 Mbits/sec receiver

iperf Done.

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Thanks for the feedback madeizwar

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I dont know if have relevance, but at least for me in my dir-882 A1, the latest snapshots and in the 22.03 rc5, the wifi 5 have problems, after a few minutes to 2 hours, the wifi 5 have no internet, then, and again, i dont know if have relevance, but the wifi hardware of the dir-882 A1 is the mt7615N, in both wifi radios, but the driver installed in the firmware is for the 7615/7615e, then, have this some revelance/importance for the bad wifi 5 performance?

The same thing happens to me too, I have tested several client devices and it happens with all of them.

For testing I also tried with my old DIR-860L and the same thing happens, exactly as they wrote here:

How is it possible that after a long time it is still not possible to understand the cause?

rakantoh and craz,
You can try the custom release by arinc9 and see if that helps.

His release should be using an older kernel and drivers...

Anything that can go wrong, will go wrong - Murphy's Law
These wifi drivers are just fairly complex things to get working right at every possible situation. One would have to have a driver with additional debugging features enabled, wait for the bug to appear and then try to figure out what has happened. I am not sure you want to go there though.

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Update,
̶7̶ 25 days of using arinc9's release with no 5 GHz WiFi issues.

EDIT:
After 25 days of uptime with no 5 GHz WiFi problems, ceasing test.
Need to test some other routers ...

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Will try it out on xiaomi r4a gigabit. I'm also having issues with "connected,no internet" (MT76x1E)

Also, which software do you use for hosting the files? I was playing around with wordpress in docker and nextcloud, however both seem inadequate to just serve a file tree from a folder.

It’s caddy webserver. You can host a directory in just 2 lines of caddyfile configuration.

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I still have the issue of "Connected, no Internet" very often

Yes me too and in the end I gave up, I changed router and firmware.

I still have the issue of "Connected, no Internet" very often 2

To avoid confusion for others reading this topic,
The D-Link DIR-860L rev B1 uses MediaTek MT7612E WiFi chip.

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Thank you for all information. I'm still using Xiaomi MIR3P with 19.07.10.

i installed the arinc's release today, i will try a few days and i will comment if i have problems, one question, i guess that i must dont update any package, right? and other question, can i install adittional packages, example, luci upnp?

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Should be fairly up to date already.

Should not be any problems installing packages, I've installed adblock/luci-app-adblock, unless they are not compatible due to changes. e.g. nftables is default so will not work with packages like banIP, which relies on iptables.