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Firmware: Signature Version: 2.376 2023/10/17 - Filling System Log with errors

Star III

Router: RT-AC66U B1 (AC1750); Firmware Version: ;
On Tuesday, 2023/10/17, I noticed the entire System Log filled with the same repeating errors, all starting with error: "kernel: dcd/22609: potentially unexpected fatal signal 6." The only difference between the errors is the dcd number.

I checked the Administration menu, Firmware Upgrade tab, and found that the Firmware Signature Version had been updated to "2.376 2023/10/17 09:04" which was a couple of hours before I checked the logs.

After seeing that, I unplugged the Router for a few minutes and plugged it in again and let it boot up.

The errors went away for about an hour then came back. Subsequent (4) power off/on resulted in the same situation.

The errors do not seem to be affecting the router's performance, but the problem needs to be addressed by Asus. Attached is a snippet of the errors.



sorry for the inconvenience that may caused.

Based on your issue, did you see the error message "kernel: dcd/10234 potentially unexpected fatal signal 6" in the Feedback log? To help our backend team analyze the problem further, please provide the Feedback log, router model, current firmware version, and a screenshot of the error message in a private message to me. You can submit a feedback form through the Web GUI at

  1. Connect your device to your router and log in to the Web GUI (
  2. Find "Administration" and click on "Feedback."
  3. Fill in your region, email (required field), ASUS Service No./Case No. (not required), select the feedback problem and description. You can also provide additional comments or suggestions.
  4. Read and agree to the terms.
  5. Click "Send" to submit your feedback.

Afterward, send the product serial number, the time you submitted the issue report, the email used for the report, and the time the issue occurred to me in a private message. Thank you.

Hi @Aureliannn_ASUS ,

I submitted the log via the feedback log.  Please keep us informed of the development of the resolution of this problem.


Star II

I have the same issue with an AC-3100

I have updated to and errors seem to have gone away.

Thanks to ASUS for fix.


As of today, 11/26/2023, mine's still stuck at the same version from 05/11/2023 as stated in the OP.   😞

I'm sticking with the Merlin firmware as stated near the end of the thread - it's working like a charm.