Netgear R8000 r50936 std. VHT80, Channel option Auto only

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wirevpn
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Joined: 09 Nov 2022
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PostPosted: Thu Dec 01, 2022 18:24    Post subject: Netgear R8000 r50936 std. VHT80, Channel option Auto only Reply with quote
Router ModelNetgear R8000
Firmware VersionDD-WRT v3.0-r50963 std (11/28/22)
Kernel VersionLinux 4.4.302-st28 #8308 SMP Mon Nov 28 05:21:43 +06 2022 armv7l
Regulatory Domain set to U.S./Canada.
the wl0 VHT80, Channel option has only auto option. But if using VHT40, the channel options will show up. All following the instructions 1) set the Channel Width and Save.2) Set the Extension Channel UU, LL or UL and save...
what setting could be wrong?



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dale_gribble39
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PostPosted: Thu Dec 01, 2022 20:55    Post subject: Reply with quote
Keep in mind that extension channels are "backwards" according to all resources of information.
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wirevpn
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Joined: 09 Nov 2022
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PostPosted: Fri Dec 02, 2022 2:01    Post subject: Reply with quote
dale_gribble39 wrote:
Keep in mind that extension channels are "backwards" according to all resources of information.

Thanks
Do you mean extension channels should be set to "upper upper"?
Per Yngve Berg
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Joined: 13 Aug 2013
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PostPosted: Fri Dec 02, 2022 7:46    Post subject: Reply with quote
The channels above 100 is missing.

Is the router the R8000-NAS model?
Mile-Lile
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Joined: 24 Feb 2013
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Location: Belgrade

PostPosted: Fri Dec 02, 2022 10:18    Post subject: Reply with quote
Put mode to off and TPC mitigation factor to 0. Set tx to manual 84mW (because auto uses usually max power 31 dBm)
So, you must follow regdomain...



Mile-Lile
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Location: Belgrade

PostPosted: Fri Dec 02, 2022 10:53    Post subject: Reply with quote
to check current tx power use this:

Code:
wl -a eth1 txpwr


this will output current tx power for adapter eth1 (wl0)
foz111
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PostPosted: Fri Dec 02, 2022 13:52    Post subject: Reply with quote
You could try via Telnet/SSH (this was a solution for the channels not showing on R7000P)::
Code:
nvram set brcm_unlock=1
nvram commit
reboot

hope this helps

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Mile-Lile
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Joined: 24 Feb 2013
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Location: Belgrade

PostPosted: Fri Dec 02, 2022 15:56    Post subject: Reply with quote
That nvram variable didn't worked last time I checked it... It worked on my R6250 though...
wirevpn
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Joined: 09 Nov 2022
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PostPosted: Fri Dec 02, 2022 20:44    Post subject: Reply with quote
Thank you for all your help!
Per Yngve Berg wrote:
The channels above 100 is missing.

Is the router the R8000-NAS model?

It is R8000, not R8000-NAS model

Mile-Lile wrote:
Put mode to off and TPC mitigation factor to 0. Set tx to manual 84mW (because auto uses usually max power 31 dBm)
So, you must follow regdomain...

Follow the instructions, But still has the "Auto" option only

foz111 wrote:
You could try via Telnet/SSH (this was a solution for the channels not showing on R7000P)::
Code:
nvram set brcm_unlock=1
nvram commit
reboot
hope this helps

Apply through SSH, but no change.



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Mile-Lile
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Joined: 24 Feb 2013
Posts: 1634
Location: Belgrade

PostPosted: Fri Dec 02, 2022 21:23    Post subject: Reply with quote
tx power 900... can you try 84 and report back as I suggested...
wirevpn
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Joined: 09 Nov 2022
Posts: 8

PostPosted: Fri Dec 02, 2022 22:20    Post subject: Reply with quote
Thank you for your help!
Mile-Lile wrote:
tx power 900... can you try 84 and report back as I suggested...

Tried 84, remain the same, still has "Auto" Only



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Cobra1582
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Joined: 29 Nov 2011
Posts: 104

PostPosted: Sat Dec 03, 2022 18:28    Post subject: Reply with quote
using r8000 and the code
Code:
nvram set brcm_unlock=1
nvram commit
reboot

opened up a lot more channels for me. what exactly did this do and is something i should ensure the easyddup save as a setting?
Mile-Lile
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Joined: 24 Feb 2013
Posts: 1634
Location: Belgrade

PostPosted: Sun Dec 04, 2022 4:24    Post subject: Reply with quote
Ok. I found it... Don't use this brcm_unlock "feature" because it doesn't help on this unit...

with brcm_unlock=1 you will get only auto channels... so, you must unset this variable to fix it.. like this:

Code:
nvram unset brcm_unlock
nvram commit
reboot


as a proof, here are screenshits:


wirevpn
DD-WRT Novice


Joined: 09 Nov 2022
Posts: 8

PostPosted: Mon Dec 05, 2022 22:26    Post subject: Reply with quote
Mile-Lile wrote:
Ok. I found it... Don't use this brcm_unlock "feature" because it doesn't help on this unit...

with brcm_unlock=1 you will get only auto channels... so, you must unset this variable to fix it.. like this:

Code:
nvram unset brcm_unlock
nvram commit
reboot


as a proof, here are screenshits:




The screenshot shows channels with "#nvram get brcm_unlock". should I apply "nvram get brcm_unlock" instead of "nvram unset brcm_unlock"? thank you
Mile-Lile
DD-WRT Guru


Joined: 24 Feb 2013
Posts: 1634
Location: Belgrade

PostPosted: Tue Dec 06, 2022 6:57    Post subject: Reply with quote
Code:
nvram get brcm_unlock

this directive shows if this option is used... when it is used it returns value 1, when it is disabled it returns 0... when doesn't show any value it means that variable doesn't exist which is original ddwrt design... so you can just restore factory defaults and try again... or you can use unset option... it is up to you...
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