RT-BE92U Persistent Thermal Zone Faults

[RicoSuave]

First post here so bear with me if I miss anything. Since purchase, my RT-BE92U has been plagued with the same issues others have posted here. Up until the new firmware version dropped, I was having constant problems with network stability. I am currently running the latest firmware version (3.0.0.6.102_37435) and a lot of the issues seem to have been resolved except for one. Before the firmware update, I was seeing intermittent thermal zone errors in the system log. Since applying the update, I am consistently getting the following errors that appear every 3 seconds exactly:

Jan 4 18:29:52 kernel: read_bpcm_reg_direct_keyhole: Wait for completion failed, devAddr 0x3, offset 24, idx 2
Jan 4 18:29:52 kernel: thermal thermal_zone0: Failed to get RAIL 0 temperature, ret=256
Jan 4 18:29:52 kernel: thermal thermal_zone0: Failed to get temperature, ret=-1
Jan 4 18:29:52 kernel: thermal thermal_zone0: failed to read out thermal zone (-1)

On occasion, the errors coincide with a drastic decrease in wireless network performance. Under normal conditions, when connected to the 6GHz network, my wireless network download speed averages around 1100Mbps. This will drop to a nearly unusable 2-3Mbps. The 2.5GHz and 5GHz networks also see a decrease in speed to around the same 2-3Mbps. Wired clients seem unaffected. Once I perform a hard reset to the router, it seems to correct the speed issue for a while, but the thermal zone errors continue to persist. This seems to happen anywhere from once a week, to every day. Performing a hard reset isn't something I want to nor should have to keep doing to correct the issue every time it happens. Please let me know if there is anything else I can do to stop this from happening. I am getting very close to returning this router and exchanging it for a different brand. Thanks.

[Lid]

I have wasted so much time, energy and a huge amount of money of this new router. I cannot afford another one.  I wish I had not gone for the latest offering, it's unlike me but I got tempted in. 

After a resetting the whole thing I have managed to avoid repeated thermal warnings but only by not using any hard drive on the USB and turning off a load of features I reasonably expected to use.

My older AC68U had two drives and one was constantly in use storing CCTV footage.  The latest router clearly could not cope with this at all.  Streaming of 2 cameras to the HDD hammered it to the point it didn't work.  But clearly it should when a 10 year old router handled it just fine. This has to be firmware.

I've also had to remove two SSID and now have just the main and kids. Also disappointing as I liked to have a guest and the IoT was a good idea or so I thought. 

If I don't touch the interface it is mostly stable and gets speeds in excess of the older model. If I try to make changes it will refresh, hang, sulk and reboot. 

My log is so full of dump packets and authentication messages it is hard to find any useful information. 

The kids secure VLAN is glitchy. It will reliably allow a connection but the clients have no internet and don't get an address from the router. I cannot fathom why but assume this is another ASUS failure of this router.  

I've selected no auto firmware update but the log also shows it constantly searching.

RAM is always nearly maxed out around 900s.

Come on ASUS get this sorted, it's a disgrace.

[changkai]

If ASUS support team needs more time to provide a firmware patch, at least give us some configuration tips (e.g., turn off certain features) to mitigate this issue in the mean time, so that we can still endure for a while more.

[Lid]

@changkai well said, so far no help has been forthcoming.  You have to wonder what if any testing ASUS conducted before releasing this product. Adding a hard drive or enabling built in security features is hardly a surprise and should not make this router fall over.

I notice is it no longer available on Amazon and other selling sites.  Call me cynical but I do fear we've been sold a dud that will quietly discontinued. I hope I am wrong.

[gsotrout1]

I appreciate that the mods are at least engaging here and acknowledging there is an issue.

I believe an amicable solution will be forthcoming.

[Asiatic_Static]

I got this router last week and am also having problems with high utilization on one CPU core, thermal zone fault messages every 3 seconds, and random hard reboots. I'm not absolutely certain, but I believe this was happening with both the original firmware and the latest 3.0.0.6.102_37435 version.

After much troubleshooting, I've narrowed it down to the 2.4 GHz radio for me. When I disable that radio in Advanced Settings -> Wireless -> Professional -> 2.4 GHz -> Enable Radio -> No -> Apply, and reboot (very important!), I see CPU utilization under 10%, no thermal zone fault messages, and haven't had any hard reboots so far.

If I re-enable 2.4 GHz, all the issues immediately return, even without any SSIDs configured for 2.4 GHz. The radio itself seems to be the issue vs clients trying to connect to it.

If anyone having issues can try this out and report back, I'd be interested in the results!