Comment 86 for bug 177895

Some further investigation. Resetting bios to it's defaults was a good idea.. Don't know what exacly was changed but it improved many things..
Amount of wakeups without any special kernel parameters is quite low after that. I've even managed to get under 16W boundary and made 15,4W with full working desktop, wifi on but hdd off (hdparm -B 120 /dev/sdb - which is not good, but why not for testing).

Here are some results - with acpi=noirq and without it (after bios settings reset).