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.

[gsotrout1]

Want to chime in that I am having the same behavior on my RT-BE92U with the reported repeating thermal error in the system log.  I have submitted through the feedback tab though the router management webpage.  Core 4 on system status is constantly bouncing and RAM utilization is basically pegged at 73% with minimal traffic.

[Aureliannn_ASUS]

Hi @gsotrout1 ,

Thank you very much for your reply and cooperation!

To help us resolve your issue more quickly, please provide the following information via private message so that we can forward your problem report to the backend team for detailed investigation:

• Product serial number:
• Feedback submission time:
• Email address used for feedback:
• Time of the issue occurrence:
• Device MAC address:
• Current network topology diagram:

Additionally, we would like to further understand your issue:

1. Are there any other error messages besides the hotspot error message?
2. Have you tried performing a hard reset?
3. Did this issue only start appearing after updating to the latest firmware version (3.0.0.6.102_37435)?

Providing this additional information will help us more accurately locate the problem. Thank you.

[Pokok]

Having the same issue. Hard reset totally not work... 

Jan 10 11:07:24 kernel: read_bpcm_reg_direct_keyhole: Wait for completion failed, devAddr 0x3, offset 24, idx 2
Jan 10 11:07:24 kernel: thermal thermal_zone0: Failed to get RAIL 0 temperature, ret=256
Jan 10 11:07:24 kernel: thermal thermal_zone0: Failed to get temperature, ret=-1
Jan 10 11:07:24 kernel: thermal thermal_zone0: failed to read out thermal zone (-1)

[Ckarpurk]

I am also having the same issue and I just bought this router yesterday.... If this doesn't get fixed within a week I will have no choice but to return the router. Performing a hard reset did not fix the issue.

Jan 11 08:03:43 kernel: read_bpcm_reg_direct_keyhole: Wait for completion failed, devAddr 0x3, offset 24, idx 2
Jan 11 08:03:43 kernel: thermal thermal_zone0: Failed to get RAIL 0 temperature, ret=256
Jan 11 08:03:43 kernel: thermal thermal_zone0: Failed to get temperature, ret=-1
Jan 11 08:03:43 kernel: thermal thermal_zone0: failed to read out thermal zone (-1)

Firmware

Current Version : 3.0.0.6.102_37435-gdd27f25_1059-g807f7_BB0B

[changkai]

I'm seeing the same problem! My router reboot seems to happen a few times a day.  And here are some logs I gathered right before one of the reboots:

Jan 11 22:16:56 kernel: thermal thermal_zone0: Failed to get RAIL 0 temperature, ret=256
Jan 11 22:16:56 kernel: thermal thermal_zone0: Failed to get temperature, ret=-1
Jan 11 22:16:56 kernel: thermal thermal_zone0: failed to read out thermal zone (-1)
Jan 11 22:16:58 wlceventd: wlceventd_proc_event(656): wl0.3: Deauth_ind 10:5A:17:0B:83:88, status: 0, reason: Unspecified reason (1), rssi:0
Jan 11 22:16:58 wlceventd: wlceventd_proc_event(696): wl0.3: Auth 10:5A:17:0B:83:88, status: Successful (0), rssi:0
Jan 11 22:16:58 wlceventd: wlceventd_proc_event(656): wl0.3: Deauth_ind 10:5A:17:0B:83:88, status: 0, reason: Unspecified reason (1), rssi:0
Jan 11 22:16:58 wlceventd: wlceventd_proc_event(696): wl0: Auth 10:5A:17:0B:83:88, status: Successful (0), rssi:0
Jan 11 22:16:59 wlceventd: wlceventd_proc_event(656): wl0: Deauth_ind 10:5A:17:0B:83:88, status: 0, reason: Unspecified reason (1), rssi:0
Jan 11 22:16:59 wlceventd: wlceventd_proc_event(696): wl0.3: Auth 10:5A:17:0B:83:88, status: Successful (0), rssi:0
Jan 11 22:16:59 kernel: read_bpcm_reg_direct_keyhole: Wait for completion failed, devAddr 0x3, offset 24, idx 2
Jan 11 22:16:59 kernel: thermal thermal_zone0: Failed to get RAIL 0 temperature, ret=256
Jan 11 22:16:59 kernel: thermal thermal_zone0: Failed to get temperature, ret=-1
Jan 11 22:16:59 kernel: thermal thermal_zone0: failed to read out thermal zone (-1)
Jan 11 22:17:02 kernel: read_bpcm_reg_direct_keyhole: Wait for completion failed, devAddr 0x3, offset 24, idx 2
Jan 11 22:17:02 kernel: thermal thermal_zone0: Failed to get RAIL 0 temperature, ret=256
Jan 11 22:17:02 kernel: thermal thermal_zone0: Failed to get temperature, ret=-1
Jan 11 22:17:02 kernel: thermal thermal_zone0: failed to read out thermal zone (-1)
Jan 11 22:17:02 wlceventd: wlceventd_proc_event(656): wl0.3: Deauth_ind 10:5A:17:0B:83:88, status: 0, reason: Unspecified reason (1), rssi:0
Jan 11 22:17:02 wlceventd: wlceventd_proc_event(696): wl0.1: Auth 10:5A:17:0B:83:88, status: Successful (0), rssi:0
Jan 1 08:00:37 kernel: klogd started: BusyBox v1.24.1 (2024-12-08 22:32:46 CST)
Jan 1 08:00:37 kernel: Linux version 4.19.294 (root@asus) (gcc version 10.3.0 (Buildroot 2021.02.4)) #1 SMP PREEMPT Sun Dec 8 22:36:47 CST 2024
Jan 1 08:00:37 kernel: ARM_SMCCC_ARCH_WORKAROUND_1 missing from firmware
Jan 1 08:00:37 kernel: Kernel command line: coherent_pool=4M cpuidle_sysfs_switch pci=pcie_bus_safe console=ttyAMA0,115200 rootwait rng_core.default_quality=1024 mtdparts=brcmnand.0:2097152(loader),265289728@2097152(image) root=/dev/ubiblock0_4 ubi.mtd=image ubi.block=0,4 rootfstype=squashfs
Jan 1 08:00:37 kernel: bootloader version U-Boot2019.07(12/08/2024-22:34:48+0800)50404p3@523100
Jan 1 08:00:37 kernel: BoardId [RT-BE92U], NVRAM_ULBOARDSTUFFOPTION=0
Jan 1 08:00:37 kernel: size of sk_buff 576
Jan 1 08:00:37 kernel: offset of cb in sk_buff 400
Jan 1 08:00:37 kernel: OTP driver initcall
Jan 1 08:00:37 kernel: OTP driver scanning DT
Jan 1 08:00:37 kernel: Strap Register: 0x7fffebc3