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RT-BE92U Persistent Thermal Zone Faults

RicoSuave
Star III

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.

176 REPLIES 176

48 hours since updating to 9.0.0.6.102_37803. So far no thermal errors in my system log.

I have 100Mb download and 10Mbit

I started activating some features, IPv6 first. Within 1 hour of activating this feature I started getting the thermal errors.  Hopefully this adds some  helpful info for Asus to help resolve this issue. Watching cpu usage, no core is going over 25%. 

stealththx
Star I

Well, add me to the list. Just set this up, updated firmware, and seeing the same thermal errors logged as mentioned in the thread. No issues with reboots yet. 

PoweredByVeg
Star I

New firmware just released 3.0.0.6.102_37500

Ah maybe the beta has just made general release.  Doesnt solve the thermal issue but seems to solve CPU spiking

 

stealththx
Star I

Thanks for the heads up on the new firmware. I applied 3.0.0.6.102_37500 and surprisingly it resolved the thermal issue on my end which was being logged every 3 seconds or so on the previous version. I'm running 2.4, 5, and 6Ghz, MLO, AiProtection, and Time Machine. 32 clients currently connecting across the various bands. 

Screenshot 2025-02-17 174633.jpg