Hal,

I attached a little utility I wrote to dump the DMAR tables from ACPI. If you 
run it and post the output it might show what TXT thinks is wrong with DMAR. 
You will have to build and run it on linux.

Thanks
Ross

-----Original Message-----
From: Hal Finney [mailto:hal.fin...@gmail.com] 
Sent: Tuesday, July 28, 2009 7:33 PM
To: tboot-devel@lists.sourceforge.net
Subject: [tboot-devel] GETSEC[SENTER] fail on HP dc7800

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

Attachment: dmardump.tgz
Description: dmardump.tgz

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