From: PowerTop [mailto:powertop-bounces@lists.01.org] On Behalf Of Wout Mertens Sent: Thursday, February 20, 2014 12:38 PM To: Arjan van de Ven Cc: powertop(a)lists.01.org Subject: Re: [Powertop] HIgh power concumption on network interface On Thu, Feb 20, 2014 at 4:06 PM, Arjan van de Ven <arjan@linux.intel.com<mailto:arjan@linux.intel.com>> wrote: On 2/19/2014 10:35 PM, Wout Mertens wrote: Alright I'll give that a shot, thanks! As a side question though, is 20W a reasonable idle power consumption for a high-end recent laptop? that's quite on the high side Having said that, screen takes a lot of power at full brightness ;) Well this was at the lowest brightness I could set it at. I just tested, and with the laptop going into "light sleep" (screen off, disk off, idle processes) it seems to use 12W. 12W is still really High. What is the C-State Residency of each core and the package? Any tips for finding out what might cause the drain? Perhaps the 16GB RAM is suspect? Or maybe just the CPU (it's an i7-4800MQ with a 47W TDP). Doubt it, I'm not sure what memory you have, but even if you have DDR3 I still wouldn't expect > 5W due to memory. My guess is you have bad GPU or CPU Residency. Maybe you have a misbehaving device. Wout.