Hi Hal

The error code means VTd is disabled.
Is your VT-d enabled in your new BIOS and grub.conf?

Thanks.
Shane

Hal Finney wrote:
> I haven't run tboot in a while, but I'm trying it on my HP dc7800 and
> finding it hangs in GETSEC[SENTER]. This is even true with old
> versions of tboot that used to work. My system has no USB ports
> plugged in, and no hardware changes.
> 
> The one change is I recently updated my BIOS. I suspect this has to be
> the cause. One nice thing about the new BIOS is that the tboot hang
> actually reboots the machine with the ERRORCODE register intact. Its
> value is c00020a1. This is progress code 0ah, error code 1000,
> meaning: "device scope of VT-d DMAR ACPI table is invalid". Not clear
> what this means.
> 
> My log is attached, including the hang and the relaunch of tboot. This
> is version 20090330 of tboot. Thanks very much -
> 
> Hal Finney


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