Remove a default kernel parameter permanently

TrueNAS General
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4

I had similar problems with a DL380 G6 after upgrading to Fangtooth recently.

I used:

midclt call system.advanced.update '{"kernel_extra_options": "intel_iommu=off"}'

…to add the intel_iommu=off kernel parameter. When the systems boots you can see that the kernel parameters include both intel_iommu=on and intel_iommu=off, the latter overriding the former.

FWIW, I also turned off Intel VT-d in the BIOS, just in case the kernel parameters ever get reset/overridden by an upgrade.

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