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RT-BE92U Persistent Thermal Zone Faults

RicoSuave
Star II

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.

50 REPLIES 50

Hi @Pokok @changkai @Chobra @def2 @MongoNC 

The team would like to further investigate the issue. 

Could you please use the system to report the problem at the moment it occurs? After completing the report, please send me the following information via private message, and we will ask the team to verify:

  • Product Serial Number
  • Time of Problem Report Submission
  • Email Address Used in the Problem Report
  • Time When the Issue Occurred
  • Device MAC Address
  • Current Network Architecture Diagram

Please follow these steps to report the issue via the Web Management Interface:

  1. Connect your device (PC, NB, etc.) to the router, open the Web Management Interface (http://router.asus.com/), and log in to your router.
  2. Click on "System Management" and select "Feedback".
  3. Fill in your location, email address (required), ASUS Service/Case Number, problem type, and problem description.
  4. Read and agree to the Privacy Policy and related service terms.
  5. Click "Submit" to send your form.

If the network is down at that moment, the UI page will generate an offline data download link. Please click to download the offline data, compress it into a zip file, and upload it to any cloud link for our analysis.

Thank you.

Hi @Ckarpurk @Asiatic_Static ,

Since both of you mentioned that the issue of high CPU usage and thermal log does not occur after turning off the 2.4G, we would like to verify the current environment. Please report the issue while the 2.4G is still on, and then report the issue again after turning off the 2.4G. Additionally, please provide the information we listed above for our verification. Our team will compare the log information to perform a detailed analysis.

We greatly appreciate your understanding and cooperation.

Thank you.

Sorry, I’ve shut down that router and stashed it. It was replaced with an RT-BE86U. I cannot use a router whose 2.4 GHz band is glitchy or that I have to turn off to make stable. Further, I don’t have the time to wait around until it fails.

I have a ticket in with the support chat folks and just emailed them all of the above documentation requested.   Sorry but this level of documentation - specifically asking us to draw a network architecture diagram - should be handled by the Administration/Feedback tool built into the Management Interface.  

That's great! Anyway, I can't believe that the Asus QA and development teams are not able to reproduce this problem themselves.