WNDR4000 5G Wireless - No signal

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PiPPiP
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Joined: 18 Apr 2022
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PostPosted: Mon Apr 18, 2022 10:55    Post subject: WNDR4000 5G Wireless - No signal Reply with quote
Hello,

Have recently flashed WNDR4000 use as an access point, following these instructions:

https://wiki.dd-wrt.com/wiki/index.php/Wireless_access_point

All went according to plan but don't seem to be able to connect to wl1 (stated as Wireless Interface wl1 [2.4 GHz/5 GHz] - Max Vaps(16)).

Similar issue also stated at the end of this post:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=170610

This page: https://wiki.dd-wrt.com/wiki/index.php/Netgear_WNDR4000

states:

WLAN Support a/b/g/n
WLAN Max Speed N750: 300 Mb/s (2.4Ghz), 450 Mb/s (5Ghz)

Am am light years from any expertise in this stuff so if I've overlooked something obvious apologies in advance. Have (randomly) tried to change settings with the expected results. Am beginning the think the issue might be intrinsic with the hardware, not dd-wrt.

Details of settings below:

Router Model Netgear WNDR4000
Firmware Version DD-WRT v3.0-r48255 mega (02/01/22)
Kernel Version Linux 4.4.301 #14124 Tue Feb 1 09:12:35 +07 2022 mips

CPU Model Broadcom BCM4716 chip rev 1
CPU Cores 1
CPU Features MIPS32r1 MIPS32r2 MIPS16 DSP DSP2
CPU Clock 480 MHz

Wireless Interface wl1 [2.4 GHz/5 GHz] - Max Vaps(16)
Wireless Mode AP
Wireless Network Mode NA-Mixed
Wireless Network Name (SSID)
Wireless Channel 100-5.500 GHz
Channel Width Wide HT40 (40 MHz)
Extension Channel uppper
Wireless SSID Broadcast Enable
Dynamic WDS Mode Disable
Sensitivity Range (ACK Timing) 200
Wireless GUI Access Enable
Multicast To Unicast Disable
Network Configuration Bridged

Any ideas appreciated.

Regards,

PiP
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kernel-panic69
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Location: Texas, USA

PostPosted: Mon Apr 18, 2022 18:08    Post subject: Reply with quote
Try changing ACK timing to 1350, channel to one of the non-DFS channels.


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PiPPiP
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Joined: 18 Apr 2022
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PostPosted: Tue Apr 19, 2022 9:14    Post subject: Reply with quote
Thanks kernel-panic69,

Made those changes - no luck. The 5G SSID will fleetingly appear in the wireless menu (both laptop and mobile phone), with one or no bars, and then disappear again (this was also occurring before).

Have tried increasing tx power, but that also does not appear to make a difference.

One item to note is that I am in australia, have used both that and US for Regulatory Domain, also with no change to outcome.

Are there any logs or the like I can provide that might assist tracking down issue?

Regards
PiP
bushant
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Location: WCentral Indiana USA

PostPosted: Tue Apr 19, 2022 12:39    Post subject: Reply with quote
I have had trouble using Wireless Network Mode NA-Mixed.
Using Mixed fixed my problems.

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kernel-panic69
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Posts: 13112
Location: Texas, USA

PostPosted: Tue Apr 19, 2022 14:54    Post subject: Reply with quote
The only other suggestion(s) I can make, given the age of the router, is to check/replace the filter capacitors on the SoC board and replace the AC power adapter.
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PiPPiP
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Joined: 18 Apr 2022
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PostPosted: Wed Apr 20, 2022 11:58    Post subject: Reply with quote
thanks both - won't get into cap replacement, skills and time limited. Will over the weekend try an earlier version as recommended in the wiki (r38060 K3X); if that works I'll revert.

Bushant - tried the mixed mode - and many variations, but no improvement.

regards,

PiP
PiPPiP
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Joined: 18 Apr 2022
Posts: 6

PostPosted: Sun Apr 24, 2022 6:59    Post subject: Reply with quote
I have reflashed with r38060 and both wireless connections now work - did twice over and got same results both times, so am concluding something has been modified subsequent to that build that is not compatible with the wndr4000.

Happy to leave as is; let me know if I need to be reporting this anywhere else.
kernel-panic69
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Location: Texas, USA

PostPosted: Sun Apr 24, 2022 18:13    Post subject: Reply with quote
It would be nice to know at precisely what build that the 5GHz radio stopped working. There's over 10k commits to the development of DD-WRT to sift through to find that needle in the haystack. System logs, dmesg, serial log would probably help... I can contact BrainSlayer and link this thread, but I guarantee you he will want you to step forward through the builds to see where it broke if he can't magically find the issue right away.
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PiPPiP
DD-WRT Novice


Joined: 18 Apr 2022
Posts: 6

PostPosted: Mon Apr 25, 2022 9:30    Post subject: Reply with quote
I should be able to attend over the course of a few weekends. Let me know what logs need to be posted - you'll have a bear with me as time and talent wanting.

Regards,

PiP
kernel-panic69
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Posts: 13112
Location: Texas, USA

PostPosted: Mon Apr 25, 2022 15:34    Post subject: Reply with quote
Incremental flash upgrades until the 5GHz stops working would be the way to go.
Keep in mind that at some point the K3x builds went from a 3.10.x kernel to 4.4.x
and that swconfig support was added, which may require a hard reset. What would
be helpful is screenshots of basic and advanced wireless settings; output of the
following via telnet / ssh with syslogd and klogd enabled under the services tab:
Code:
dmesg
cat /var/log/messages

As stated previously, the only other information would be in the serial console log,
which requires attaching a serial USB-UART-TTL adapter. To be quite honest, lack of
reporting in the forum build release threads and having that "recommended build"
section in the wiki are both counter-productive to the community at large and
the developer(s)....

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jwh7
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Joined: 25 Oct 2013
Posts: 2666
Location: Indy

PostPosted: Fri Apr 29, 2022 14:56    Post subject: Reply with quote
PiPPiP wrote:
Made those changes - no luck. The 5G SSID will fleetingly appear in the wireless menu (both laptop and mobile phone), with one or no bars, and then disappear again (this was also occurring before).
I had noticed this too, when I dug out and updated mine to use as an AP for the in-laws house in FL. Didn't have time to further troubleshoot though, since the 2.4 GHz was needed for their front door and garage corner cams.
kernel-panic69 wrote:
Incremental flash upgrades until the 5GHz stops working would be the way to go.
novatech's post here is probably a good start. Wink [edit - gracias kp69 Cool ]
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# NAT/SFE/CTF: limited speed w/ DD # Repeater issues # DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo #
OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250
|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4


Last edited by jwh7 on Wed May 04, 2022 3:49; edited 1 time in total
kernel-panic69
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Location: Texas, USA

PostPosted: Fri Apr 29, 2022 17:13    Post subject: Reply with quote
And "noVatech's" post leads to this one for dd-wrt.v24-46640_NEWD-2_K3.x_mega-nv64k.bin:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1236623#1236619

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Contribute To DD-WRT
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PiPPiP
DD-WRT Novice


Joined: 18 Apr 2022
Posts: 6

PostPosted: Sat Apr 30, 2022 0:51    Post subject: Reply with quote
Ok - have jumped to v46640 and confirmed that both wireless modes look ok (although there does appear to be an issue with using the WAN port - I won't dwell on that for now). I used dd-wrt.v24-46640_NEWD-2_K3.x_mega-WNDR4000 rather than the nv64k version (not sure which is the preferred build so will stick with the WNDR4000 for now).

dd-wrt.v24-47510_NEWD-2_K3.x_mega-WNDR4000 - working ok
dd-wrt.v24-47942_NEWD-2_K3.x_mega-WNDR4000 - working ok
dd-wrt.v24-48141_NEWD-2_K3.x_mega-WNDR4000 - working ok

I think I can see where this is going...

Yep, have come full circle:
dd-wrt.v24-48255_NEWD-2_K3.x_mega-WNDR4000 - working ok.

About the only thing that make me hesitate from saying this is 100% user error is I have two WNDR4000 units, and both exhibited the exact same behavior when originally flashed with 48255 - how that is now not the case I can't speculate.

Apologies for the run-around.

Regards,

PiP
jwh7
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Joined: 25 Oct 2013
Posts: 2666
Location: Indy

PostPosted: Wed May 04, 2022 3:48    Post subject: Reply with quote
PiPPiP wrote:
Yep, have come full circle:
dd-wrt.v24-48255_NEWD-2_K3.x_mega-WNDR4000 - working ok.

About the only thing that make me hesitate from saying this is 100% user error is I have two WNDR4000 units, and both exhibited the exact same behavior when originally flashed with 48255 - how that is now not the case I can't speculate.
I suspect you will find that the radio will die after a reset. So it's an nvram issue. I recall this is what I'd encountered, since I upgraded for a long time w/o reset, no issue. Then I reset to switch from CB/CM to AP mode (for production use) and it all went to eff. And I didn't have the time to troubleshoot at the time. Wink
_________________
# NAT/SFE/CTF: limited speed w/ DD # Repeater issues # DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo #
OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250
|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4
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