AC87U 5GHz not working

[ZtrydR]

Cleaning up.

 

[polish_pat]

Did you try any merlin variants?

 

[raphaelogy]

Certain users have proposed the idea of overheating causing the 5ghz radio to stop working. some suggestions for you is to try to ventilate the router with fan or to elevate the height of the router ensuring adequate ventilation at the base.

since you are on 2769, i strongly recommend you to try 3754. it is available as the latest firmware for ac87u/r. this current firmware features a brand new driver for the 5ghz chipset.

 

[polish_pat]

Certain users have proposed the idea of overheating causing the 5ghz radio to stop working. some suggestions for you is to try to ventilate the router with fan or to elevate the height of the router ensuring adequate ventilation at the base.

since you are on 2769, i strongly recommend you to try 3754. it is available as the latest firmware for ac87u/r. this current firmware features a brand new driver for the 5ghz chipset.

As far as I understood OP, he mentions the 5GHz becoming unavailable when changing settings that require the radios to turn off...this would rule out overheating.

You should try Merlin. There is no reason not to. The firmware looks 100% stock but add a bunch of fixes and tweaks. You should check out a bit of history about the Merlin dev, hes so good sometimes asus take fixes from his firmware and apply them to theirs. Plus he fixes bugs a lot faster then asus does

 

[RMerlin]

Make sure the WPA2 key does not contain any non-alphanumerical characters. Same for the SSID.

 

[ankhazam]

Hi,
please:
1) update the router to latest stable firmware
2) reconfigure
3) report if bug is still present

Regards

 

[RMerlin]

The password contains "special characters" like "! & /" that's affecting? Also how would that affect the 5 GHz but not the 2.4?

The 5 GHz radio is handled by a separate firmware that runs on a separate CPU, which gets its parameters manually, rather than directly through nvram. Different communication mechanism.

 

[polish_pat]

Told you

 

[nikki]

I'm getting 5GHz disabled sometimes.

1. At tools->sysinfo:
2.4 GHz: 43°C - 5 GHz: disabled - CPU: 78°C

and empty space in "Quantenna Firmware" field.

2. At wireless log:
Wireless 5 GHz is disabled.

On rebooting it sometimes get work again, but sometimes remains in "disabled" state. I tried factory reset and reconfiguring without success.

Firmware version Merlin 380.57_0,
Thu Dec 24 18:54:51 UTC 2015 merlin@795ca35