System interrupts go wild from cold boot.

Ben Cole · 19 Sep 2016 at 21:32

Been having a problem with system interrupts, see here..

https://forums.overclockers.co.uk/showthread.php?t=18749202

I've worked out that its only from a cold boot. If I restart they settle down completely, from cold boot 15-20% of CPU is used up.

Any more ideas?

lurkio · 20 Sep 2016 at 12:50

try unplugging all usb connected devices except keyboard/mouse

power up PC see if it still happens

If it doesn't then power off and add one new device and power up PC , repeat until the problem device shows up

Ben Cole · 20 Sep 2016 at 15:52

It's a tablet but I suppose I could try removing the touch cover and SD card.

Thanks.

Ben Cole · 20 Sep 2016 at 22:09

Think I've got this solved.

Just in case somebody does a search and ends up here. The answer for me was disabling Windows fast boot. The hibernation aspect of fast boot mode obviously played havoc with reloading drivers. Resume from hibernate would also result in crazy system interrupts.

This has done my head in for weeks and weeks. So happy to get it sorted, sleep efficiency seems to have improved too, from just under 2% drain per hour to 0.5% per hour.