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EDID block 0 is all zeroes causes CPU spikes

Description

After upgrading to TrueNAS-SCALE-23.10-BETA.1 I noticed constant CPU usage spikes that were not present while running TrueNAS-SCALE-22.12.3.1.

The spikes constantly appear about every 20 seconds.

 

While viewing my TrueNAS console, I notice that the spikes in CPU usage correspond to the following message, which also appears about every 20 seconds: EDID block 0 is all zeroes

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Bug Clerk May 30, 2024 at 6:17 PM

This issue has now been closed. Comments made after this point may not be viewed by the TrueNAS Teams. Please open a new issue if you have found a problem or need to re-engage with the TrueNAS Engineering Teams.

Bug Clerk May 30, 2024 at 6:17 PM

This does not appear to be a TrueNAS issue, however TrueNAS 24.10 should have a newer kernel and potentially solve this problem.

Bonnie Follweiler May 30, 2024 at 4:11 PM

Good Afternoon .

I have moved this ticket into our queue to review.

An engineering representative will update with any further questions or details in the near future.

Stuart Landcope February 1, 2024 at 2:47 AM

Just created an account to say thanks Troy for submitting the report and thanks Jonathan for coming up with a good workaround. I had similar issues that appear to be gone after Jonathan’s fix.

For reference, my set up is also a Supermicro X11SSH-F Xeon E3-1245v5 running Cobia 23.10.1.3. I did not notice an issue until updating from Bluefin to Cobia.

Jonathan Rascher December 1, 2023 at 6:01 PM
Edited

Debian has some “live USB” images that might be useful here: . Given that this bug seems to occur as soon as the i915 driver loads and it shows up right away in dmesg, I don't think actually installing Debian would be needed to repro.

And, to be clear, I do agree this should be fixed even if it’s just logspam. Without the workaround, dmesg becomes kind of useless for finding other problems since it just fills up with the EDID error….

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Katalon Platform

Created August 19, 2023 at 3:28 PM
Updated February 27, 2025 at 9:14 PM
Resolved May 30, 2024 at 6:17 PM