9€? I didn't see any so cheap, anyway I can even keep using the ups, the watts up pro was more interesting because you can connect it to the pc and it has linux drivers.
Yes, maybe. But I just plug that 9€ thing in PC socket and it can show wattage, peak wattage, power efficiency etc. And to test if its showing right, plug 40w light bulb in it or something similar.. I mean, of course maybe wattsup shows more precisely and can report back the consumption to the machine, to use it in scripts etc. But for random drain check the basic 9€ thing is more than enough. Is in every supermarket.
On opensource drivers power managment dont work at all on my Sapphire HD 2600 XT. I tried every state - nothing happens, even dynpm doesnt works Tested on Ubuntu 11.04 amd64 and gentoo amd64-2.6.38. /sys/kernel/debug/dri/0/radeon_pm_info always same: