Dell - Proxmox - TSC_Deadline 0xb000020


Jul 2, 2019
Good day all.

I was rebooting a node earlier and saw the following error:
TSC_Deadline disabled due to Errata... 0xb000020

Some searching online points to needing to install intel-microcode.

This forum post: suggests setting to nomodeset.

We are running on a Dell PowerEdge R630. What is the best approach to fix this issue?

Thank you,



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Seems like a case of outdated BIOS and outdated microcode of CPU. To quote the explanation from here:

Your processor microcode (firmware) is old and contains bugs. Sometimes motherboard BIOS updates contain processor microcode updates, but not always, and BIOS isn't always at the latest level.

To allow OS to update your processor microcode, do this:
apt-add-repository restricted
apt update
apt install intel-microcode
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Thank you very much. I will have to schedule some time to give these suggestions a go. I will try to be sure to follow up with my results.


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