[coreboot] Lenovo X200 running Coreboot drains 3-4W more power than with Vendor BIOS

[Daniel Kulesz]

> > Okay. I was just aware of the generic "processor.max_cstate=2"
> > parameter. I tried with both parameters using the vendor BIOS and
> > here are the results:
> 
> Can you do a test run with closed devices? This would ensure, you're
> not measurring a brightness difference.

Okay, you mean with the display turned off? I did this now using xrandr and here are the results:

Coreboot: 9.0W
vendor BIOS: 6.9W

Cheers, Daniel