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.

[kjm]

I sent this feedback report from my router

[cowhow]

Holy cow did I ever kick a hornet's nest.  I was searching the logs to resolve a printer issue and a Google search turned up this thread.  Good news no reboots that I'm aware of.  But I am seeing high CPU and RAM usage.  The CPU core 4 is bouncing all over the place pegging out at near 100%.

The printer issue is confusing as it gets an IP and shows as a client on the IoT network but I cannot reach it nor get it to print.  I have three networks.  The main network, the IoT network, and a second network as a more or less unrestricted guest network.  Doing a touch test the router is not hot so the thermal warnings must be bogus.  I also have a persistent VPN connection on the main network that has seemed to be stable with no dropouts

Troubleshooting is a bit troublesome as any network changes cause the router to essentially disconnect for two to three minutes with applying the change.  And the log is so full of irrelevant entries that makes it a chore to learn anything helpful.

So, my options are severely limited because I live in Costa Rica and the nearest Best Buy is 3000 miles away.  If I had known all this melodrama was taking place I'd obviously went a different direction but that's water under the bridge forcing me to wait and hope this isn't a hardware issue but fixable with an updated firmware that I'm sure is coming by week's end.  ;-).  But, folks I sure don't like being an unsolicited beta tester.  In my 30-year IT career I would see what we have here as being nowhere near production ready.  Too many things happening,

[Lid]

@cowhow I had to remove my IoT and guest network just to get some stability. It shouldn't be this way. I have applied their beta firmware as a last resort.  I do hope it doesn't brick the router entirely as their own testing seems entirely lacking.

[cowhow]

@Lid The funny thing for me is CPU usage has changed.  Core 4 was all over the place but it's settled down and core 2 is the busy one.  I wished we had a way of filtering logs because all those bogus thermal entries make it difficult to read logs for relevant info.

Did the beta firmware improve things?  I would suspect I would need to contact ASUS to get my hands on it.

[DesiBuckeye]

I'm having the same issues.  Had completely unstable network after setting up router (with accompanying firmware upgrade). Came to this and other posts. Did the hard reset and set it up again, and the network is "less unstable", but still with issues.  I still have the log full of these issues below (more than thermal now) and also a "wave pattern" of speed/bandwidth, Core 3 bouncing close to 100% and RAM at about 75%

Errors:

Jan 23 13:44:18 bsd: bsd: Skip STA:7c:21:4a:58:91:ca reject BSSID
Jan 23 13:44:20 kernel: read_bpcm_reg_direct_keyhole: Wait for completion failed, devAddr 0x3, offset 24, idx 2
Jan 23 13:44:20 kernel: thermal thermal_zone0: Failed to get RAIL 0 temperature, ret=256
Jan 23 13:44:20 kernel: thermal thermal_zone0: Failed to get temperature, ret=-1
Jan 23 13:44:20 kernel: thermal thermal_zone0: failed to read out thermal zone (-1)

On the graph, the blue line is download speed, orange line is upload speed. They're on different axes (as noted on the left)