[PATCHED] QAM256 missing for 2.4ghz on R9000

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ho1Aetoo
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PostPosted: Wed Dec 15, 2021 10:40    Post subject: Reply with quote
TurboQAM is "out of spec"

This activates a higher modulation 256-QAM
According to WLAN specifications, there is only a maximum of 64-QAM for 802.11n.

Whether Turbo-QAM is useful or not is very much dependent on the client used - the client used must also support 256-QAM in the 2.4Ghz band.

If the client does not support it then of course the option does not bring any advantages.

And yes the command also works on the R9000
But of course you have to specify the correct radio.

R7800 = wlan1
EA8500 = wlan0 (thx mrjcd)
R9000 = wlan1 (if I remember right)
R7500v2 = wlan1 (thx bushant)


Last edited by ho1Aetoo on Wed Dec 15, 2021 16:22; edited 2 times in total
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yodog
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PostPosted: Wed Dec 15, 2021 10:44    Post subject: Reply with quote
Thank you for that reply; it helps tremendously. And yes your memory is correct for the 2.4ghz radio / WLAN1 for the R9000. I’m going to update my firmware to the latest one, it seems promising. I think I’ll disable “query dns in strict order” before I do the update though. Thanks again, cheers.
msoengineer
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PostPosted: Wed Dec 15, 2021 11:01    Post subject: Reply with quote
BS has fixed the issue as of 47489 and with the next public build the qam 256 will be back.


I have two tablets that are wifi-5, wave 2, that see 400mbps on 2.4 and I use this feature all the time. Likely as wifi-6 proliferates through new devices you'll be able to take advantage, but so many devices won't/don't right now. It only mattered to me because I can actually take advantage of it.

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the-joker
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PostPosted: Wed Dec 15, 2021 12:13    Post subject: Reply with quote
I would read

https://wirelessonthego.postach.io/post/256-qam-802-11ac
https://www.techspot.com/article/1769-wi-fi-6-explained/

My guess manufacturers support this in their varied equipment where 2.4GHz is concerned... Otherwise its a big fat lie. Like phones or their own Laptops and wifi solutions, e.g. Asus. (Testing required)

And then there is this https://ww1.microchip.com/downloads/en/DeviceDoc/70005029C.pdf

As for Wifi 6 is apparently 1024-QAM.

Take care.

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ho1Aetoo
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PostPosted: Wed Dec 15, 2021 15:46    Post subject: Reply with quote
yes, but it should be added that the high modulation is only achieved over short distances.

on longer distances with a worse connection it drops back to 256 / 64 / whatever.


1024-QAM is already available for IEEE 802.11ac (out of spec) - called Nitro-QAM
But practically not supported by any Wifi5 devices (there is no hardware implementation on chip level).

The same game will be played with future WLAN standards - who knows how it will be called "Plutonium-QAM" Wink
bushant
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PostPosted: Wed Dec 15, 2021 16:05    Post subject: Reply with quote
ho1Aetoo wrote:
But of course you have to specify the correct radio.

R7800 = wlan1
EA8500 = wlan0
R9000 = wlan1 (if I remember right)


Add R7500v2=wlan1
QAM56 was missing on 47703

I didn't wait.

nvram set wlan1_turbo_qam=1 and nvram commit + reboot.

Worked - Thanks.
the-joker
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PostPosted: Wed Dec 15, 2021 16:34    Post subject: Reply with quote
Ive always had those settings turned on even before this.

:~# nvram show | grep turbo
size: 36831 bytes (28705 left)
wl0_turbo_qam=1
wl1_turbo_qam=1

Im running build DD-WRT v3.0-r47853 std (12/15/21) but the option is still invisible on the UI.

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msoengineer
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PostPosted: Wed Dec 15, 2021 16:40    Post subject: Reply with quote
ho1Aetoo wrote:
The same game will be played with future WLAN standards - who knows how it will be called "Plutonium-QAM" Wink



It's very clear that Wifi-6 is a shit show and ath11k drivers have been an issue too reading on some of the other forums....This is why even on the cusp of 2022 The best routers are still the ones using a QCA998x setup on both radios. The issue is becoming that the market is being flooded with BCM routers and very few QCA ones. It's why I went with an Ebay R9000 again for $65- you can't beat that value even if the wifi will die eventually.

Back on topic, sort of, with wifi-6- OFDM has proven to be a shit show too and I haven't seen anything new from Tim Higgins on SMB talking about where things stand on OFDM being sorted...

So for now we wait for new development by BS...

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[R9000]52396 nightly (Main Router)
[EA8500]43192 & 45493 (2xOffsite)
[R7800] resting
[WDR3600]BS 44715 (Offsite)
[A7v5]BS 43038 (Offsite+spare napping)
kernel-panic69
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PostPosted: Wed Dec 15, 2021 16:54    Post subject: Reply with quote
ho1Aetoo wrote:
The same game will be played with future WLAN standards - who knows how it will be called "Plutonium-QAM" Wink

Plutonium Nyborg, FTW! If you don't know the reference, then you are too young.

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Alozaros
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PostPosted: Wed Dec 15, 2021 18:16    Post subject: Reply with quote
On the subject, not many people know what is a QAM or all those Beam technologies, nor AX6900 and ect....they get the bait from the marketing trick when buy a new router (for a house price)...and believe those work out of the box...and it turns out its very proprietary drama and you have to pay extra like a boss to be able to touch those...speed promised...not to mention 90% of the WiFi used this days is from a phone or tablets with shit-show wifi clients...
At the end of the day, a rich client of mine, until i've found out, ran his R9000 more than 2 years in 20HT mixed mode, with auto channel...and never complained..."WiFi is fast very fast"... Rolling Eyes

msoengineer wrote:
..... I went with an Ebay R9000 again for $65- you can't beat that value even if the wifi will die eventually.


there is your router (those are in US)

https://www.ebay.co.uk/itm/324929790178?hash=item4ba75320e2:g:eGIAAOSwJhphsTwQ

or even cheaper...

https://www.ebay.co.uk/itm/194617611064?epid=232008819&hash=item2d501d1338:g:lbAAAOSw8QVhuhmv

By the way did you managed to make it run without radio...did BS managed to make a no wifi build.. tailored...?

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msoengineer
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PostPosted: Wed Dec 15, 2021 19:12    Post subject: Reply with quote
Alozaros wrote:
By the way did you managed to make it run without radio...did BS managed to make a no wifi build.. tailored...?


BS said he would make a build for no radio's, but I have not pestered him for anything since I just bought replacements instead. I can ask again to see if he will make a no radio check build like Kong did.

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[R9000]52396 nightly (Main Router)
[EA8500]43192 & 45493 (2xOffsite)
[R7800] resting
[WDR3600]BS 44715 (Offsite)
[A7v5]BS 43038 (Offsite+spare napping)
mrjcd
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PostPosted: Thu Dec 16, 2021 2:32    Post subject: Reply with quote
yeahuh TurboQAM (QAM256) is back Very Happy
I don't use it unless I connect the two EA8500 wirelessly with the 2.4 and I don't
really have a reason to do that these days but it's good that she shows now.
Cool

AFAIK r47853 is a good'n



msoengineer
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PostPosted: Thu Dec 16, 2021 2:42    Post subject: Reply with quote
Something is up b/c there is no build for the R9000... something didn't build out... nothing to test for us Sad
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FORUM RULES

TIPS/TRICKS: Best QCA Wifi Settings | Latency tricks | QoS Port priority | NEVER USE MU-MIMO |
Why to NOT use MU-MIMO | Max Wifi Pwr by Country | Linux Wifi Pwr | AC MCS & AX MCS | QCA 5Ghz chnls to use | WIFI Freq WIKI | TFTP R7800 | Don't buy AX | IPERF3 How-To

[R9000]52396 nightly (Main Router)
[EA8500]43192 & 45493 (2xOffsite)
[R7800] resting
[WDR3600]BS 44715 (Offsite)
[A7v5]BS 43038 (Offsite+spare napping)
mrjcd
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PostPosted: Thu Dec 16, 2021 2:56    Post subject: Reply with quote
msoengineer wrote:
Something is up b/c there is no build for the R9000... something didn't build out... nothing to test for us Sad

Don't know nothing 'bout no R9000 but the WNDR3700v4 is always about last to build these days for some silly reason Rolling Eyes
then again Mr. BS may not be compiling for all just now --- prolly will release new builds very soon
kernel-panic69
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PostPosted: Thu Dec 16, 2021 7:04    Post subject: Reply with quote
The build scripts run in a certain order, not sure if there is a set order, but if a build script errors out, it errors out and requires human intervention. It is still taking quite a bit of time, even with the new build server.
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