Success! flash rom did the job correclty!!!!
I am on the 1.0.4 ec x64 bios and i can now get into the bios set up .I enabled the extra two usb ports from the header found next to the battery coin.
I will pass the bios to the gurus at mydigitalline and let us hope the modders will get us full ACPI support.
Bottom is:
If yours arima does not get into the bios and you experience strange bios behavior ,update bios using flashrom and start crunching.
Many greeting to Mr shoota at this point for his help.
Does anyone runns on a newer bios version out there?
1.0.4 ec - of 3 - 3- 08 is the latest known bios.