[SOLVED] Asus RT-AC87U, only "auto" option for 5GH

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Oober
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PostPosted: Sat Jun 03, 2023 12:00    Post subject: [SOLVED] Asus RT-AC87U, only "auto" option for 5GH Reply with quote
So, wonder if there is some workaround.

Have the RT-AC87U and I have tried 2 different DD-WRT versions, 01-03-2023-r51154 and 05-27-2023-r52720. Have applied all the settings one by one and selected "apply". However, there is no other options than "auto" available in 5 GHz channels. In addition, only "lower" and "upper" are the options for extension channel. No difference whether using 20, 40 or 80 MHz channel width. Tried "Europe" and "USA" regulatory domains. Common problem with RT-AC87U?

Thanks.


Last edited by Oober on Sun Jun 04, 2023 5:08; edited 3 times in total
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Ger482
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PostPosted: Sat Jun 03, 2023 12:35    Post subject: Reply with quote
just a shot in the dark,but did you try a reboot?
Oober
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Joined: 01 Dec 2018
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PostPosted: Sat Jun 03, 2023 13:38    Post subject: Reply with quote
Ger482 wrote:
just a shot in the dark,but did you try a reboot?


Yes, I did. No success.
dale_gribble39
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PostPosted: Sat Jun 03, 2023 15:17    Post subject: Reply with quote
Try:

Code:
Select channel width, save;
Select extension channel, save;
Select channel, save


I will say this, the 5GHz on this router has the Quantenna chipset, which is not supported in DD-WRT, and never has been. Probably because of closed source or lack of open source support from the vendor.

https://wikidevi.wi-cat.ru/ASUS_RT-AC87U


Of course, we must suspect that you are on the current release of DD-WRT.

https://ftp.dd-wrt.com/dd-wrtv2/downloads/betas/2023/06-02-2023-r52869/asus-rt-ac87u/

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Oober
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PostPosted: Sat Jun 03, 2023 15:56    Post subject: Reply with quote
dale_gribble39 wrote:
Try:

[code]Select channel width, save;
Select extension channel, save;
Select channel, save[/code

...

Of course, we must suspect that you are on the current release of DD-WRT.



Done exactly in this order.

Using 05-27-2023-r52720 right now, there is only 1 release after mine. I don't believe upgrading will fix the problem since it was there at 01-03-2023-r51154.

Found from the forum-wide search, @jrscs has reported many successful results with many DD-WRT releases with the RT-AC87U.
bushant
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PostPosted: Sat Jun 03, 2023 18:34    Post subject: Reply with quote
Another shot in the dark.
Clear your browser cache Ctrl + f5

Less of a long shot.
Reset to factory defaults and reconfig manually.

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jrscs
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PostPosted: Sat Jun 03, 2023 18:43    Post subject: Reply with quote
Had this unit since it first came out. The 5GHz wireless channel settings have never been able to be modifed since it is a Quantenna chipset and closed source. Never had an issue with the wireless as it fit my need.
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dale_gribble39
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PostPosted: Sat Jun 03, 2023 19:57    Post subject: Reply with quote
Indeed, it is a well-known issue with no resolution other than source code request from Quantenna, which I believe was denied.

jrscs wrote:
Had this unit since it first came out. The 5GHz wireless channel settings have never been able to be modifed since it is a Quantenna chipset and closed source. Never had an issue with the wireless as it fit my need.

_________________
"The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost

"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio

<fact>code knows no gender</fact>

This is me, knowing I've ruffled your feathers, and not giving a ****
Some people are still hard-headed.

--------------------------------------
Mac Pro (Mid 2012) - Two 2.4GHz 6-Core Intel Xeon E5645 processors 64GB 1333MHz DDR3 ECC SDRAM OpenSUSE Leap 15.5
Oober
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PostPosted: Sun Jun 04, 2023 5:06    Post subject: Reply with quote
jrscs wrote:
Had this unit since it first came out. The 5GHz wireless channel settings have never been able to be modifed since it is a Quantenna chipset and closed source. Never had an issue with the wireless as it fit my need.


Thanks for the info! I will also try to manage with the auto channel.

Going to mark as "solved" now.
mwchang
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PostPosted: Sun Jun 04, 2023 12:10    Post subject: Reply with quote
jrscs wrote:
Had this unit since it first came out. The 5GHz wireless channel settings have never been able to be modifed since it is a Quantenna chipset and closed source. Never had an issue with the wireless as it fit my need.

So this Quantenna 5Ghz is working? Just that no settings can be changed? And you could not disable it or turn it off?

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jrscs
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PostPosted: Sun Jun 04, 2023 13:15    Post subject: Reply with quote
mwchang wrote:
jrscs wrote:
Had this unit since it first came out. The 5GHz wireless channel settings have never been able to be modifed since it is a Quantenna chipset and closed source. Never had an issue with the wireless as it fit my need.

So this Quantenna 5Ghz is working? Just that no settings can be changed? And you could not disable it or turn it off?


Correct. The 5GHz wireless channel works and I've never tried to disable it or turn it off. Been a long time since I used it so I'll pull it out of storage in a few days to confirm.

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Oober
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PostPosted: Sun Jun 04, 2023 17:29    Post subject: Reply with quote
Weird or not, the 5GHz wifi seems to work well also with the auto channel at least for me. In fact, the coverage is as good as with the Asus firmware.
mwchang
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Joined: 26 Mar 2013
Posts: 1855
Location: Hung Hom, Hong Kong

PostPosted: Tue Jun 06, 2023 4:39    Post subject: Reply with quote
jrscs wrote:
Correct. The 5GHz wireless channel works and I've never tried to disable it or turn it off. Been a long time since I used it so I'll pull it out of storage in a few days to confirm.

Oober wrote:
Weird or not, the 5GHz wifi seems to work well also with the auto channel at least for me. In fact, the coverage is as good as with the Asus firmware.

That means the driver is in DD-WRT, just that DD-WRT does not know how to interact with the driver? That packets are flowing between the Quantenna chip and DD-WRT.

_________________
Router: Asus RT-N18U (rev. A1)

Drink, Blink, Stretch! Live long and prosper! May the Force and farces be with you!

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dale_gribble39
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PostPosted: Tue Jun 06, 2023 5:20    Post subject: Reply with quote
There's no Quantenna driver in DD-WRT, OR there is no interface to interact with said driver. From what I've come to understand from conversations of others with Mr. Gottschall himself is that there is no Quantenna support (meaning, NO DRIVER). None of the upstream kernel-available code supports the hardware, either.
_________________
"The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost

"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio

<fact>code knows no gender</fact>

This is me, knowing I've ruffled your feathers, and not giving a ****
Some people are still hard-headed.

--------------------------------------
Mac Pro (Mid 2012) - Two 2.4GHz 6-Core Intel Xeon E5645 processors 64GB 1333MHz DDR3 ECC SDRAM OpenSUSE Leap 15.5
Oober
DD-WRT Novice


Joined: 01 Dec 2018
Posts: 12

PostPosted: Tue Jun 06, 2023 7:15    Post subject: Reply with quote
dale_gribble39 wrote:
There's no Quantenna driver in DD-WRT, OR there is no interface to interact with said driver. From what I've come to understand from conversations of others with Mr. Gottschall himself is that there is no Quantenna support (meaning, NO DRIVER). None of the upstream kernel-available code supports the hardware, either.


I doubt the 5GHz wifi wouldn't work without the driver, either. As said, it is working stable, but with no chance to select the channel.

I tested a third party wifi analyzer and it seems to select the channel 136 for my 5GHz wifi. See an attachment.



Screenshot_20230606_101328_WiFiAnalyzer.jpg
 Description:
 Filesize:  68.57 KB
 Viewed:  1637 Time(s)

Screenshot_20230606_101328_WiFiAnalyzer.jpg


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