Extremely high idle power drain...

Hi guys. I'll keep it simple: I'm experiencing extremely high power draw from the battery, on the order of 18-22 W, such that a 97-Whr battery lasts less than 4.5 hours. This is frankly unacceptable. My notebook supports Optimus, and I have it enabled.

Attached is the powercfg sleepstudy report, and a screenshot of the unknown power drawer, Unknown [NONE]:


I have undervolted in ThrottleStop, killed all background and foreground processes, and this still crops up. Display brightness is at 30%. I need help, please.

Thanks very much.

 

I recommend (as explained here) that you first analyse which hardware is using the power before examining the software.

John

 

What are your temps? If they are constantly >40C it may indicate the issue is from something that is heatsinked (depending on room temp)

Otherwise you should open up your laptop whilst its running and get an IR camera and look for hotspots. 20W is a lot of heat to dissipate and something should be obviously heating up. I suppose if you don't have an IR camera you could ground yourself (important), remove all power sources (probably more important), and physically molest your laptop for any warm spots.

 

@Ionising_Radiation if you figure out what this might be as I wrote to you in the 7530/7730 thread I'm having the same issue. I'm pretty sure other owners on that thread would be too?

 

Replied to your comment in the Precision 7530 thread. Thanks again.

Where I live, ambient temperatures are ~30°C; I expect most of my components to be 40°C or higher. Your IR camera idea, however, is a very good idea. I haven't got one, but I think I can commit outrage of modesty w.r.t. my laptop (to use your metaphor), and feel where things are heating up.

It is notable that this problem occurs in Arch Linux, too.