RT-BE92U Persistent Thermal Zone Faults
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01-04-2025 06:46 PM
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.
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01-12-2025 09:03 AM
Update:
Powering down and letting it sit for over 45 min last night did not work. I checked the system log again this morning, and the faults are still asserting every 3 seconds exactly. RAM usage is at a constant 68% with little network activity. One thing I did notice just now that I didn't see before is what you said about the CPU bouncing from 50-100% 2 seconds. Core 2 on my router is doing that right now. Maybe I was so distracted with everything else wrong with the router and finding how to fix it that I didn't notice it before. @Aureliannn_ASUS Here are some more data points to add to this issue if you need them.
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01-12-2025 06:57 PM
Hi all,
thank you for the information you've provided.
We've passed your details on to our relevant backend team for analysis.
Please be patient and wait for any updates or messages from us.
Thank you.
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01-13-2025 10:34 AM
Update from my last post (1/11), issue comes back after a day, a reboot is the only temp work around for now. Hopefully the issue gets resolved in a future firmware update.
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01-13-2025 03:08 PM
Same here. Issue still comes back in less than a day.
One interesting note is that when the router automatically restarts, the wired connections seem to be able to continue working. Only the wireless connections are dropped and need to be reconnected.
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01-13-2025 03:09 PM
ASUS team, when can we get the firmware update to fix this highly frustrating issue?
