Solved!
Issue was, contradicting my notes "Kernel DMA protection" must be on (and apparently is supported by Xen/Qubes).
Attention is to one must boot the machine twice to "stick". Counter-intuitive.
Four days of struggle are over, awkward. Fun thing was to use acpidump, acpixtract and iasl.
Solved!
Issue was, contradicting my notes "Kernel DMA protection" must be on (and apparently is supported by Xen/Qubes).
Attention is to one must boot the machine twice to "stick". Counter-intuitive.
Four days of struggle are over, awkward. Fun thing was to use acpidump, acpixtract and iasl.
Please help troubleshoot/fix. A QubesOS/Xen issue.
Xen boot (xl dmesg) will eventually display: Failed to parse ACPI DMAR. Disabling VT-d). This will disable iommu support.
It's a Lenovo E15 Gen 2. The BIOS is the latest and I already ran the lenovo critical update to it. BIOS settings are also correct.
It's strange because I moved the SSD from one laptop to the other and both are exact same model/gen, the only different is the first was ram 8GB, this is 16GB.
I have added to the grub iommu=1 and tried other parameters, but they are not doing the trick. Its an Intel.
Also on:
https://forum.qubes-os.org/t/vt-d-iommu-dmar-failing-xen-troubleshooting-thinkpad-e15-gen-2/42089