Re: [Powertop] HIgh power concumption on network interface
Wout Mertens <wout.mertens at gmail.com>
| Newsgroups | dev.linux.lists.powertop |
|---|---|
| Message-ID | <CAO3V83KaAWbeeDyW6vOMFihmpk2JNGa-6XQuChUGPW2fpDYqqg@mail.gmail.com> |
kingma at bluewin.ch wrote on Wed Feb 12 23:32:27 PST 2014: > I observe a sustained high power consumption of 5- 10 W on the ehternet adaptor e1000e on a lenovo thinkgpad t430s. Such I high power drain cannot be correct can it? the total power consumption is around 25 W which is a concern for battery life. I'm noticing the same thing on my Dell Latitude E6540. It also has an e1000 and powertop reports it as being the highest consumer, at around 15W. When I unplug the system, the battery reports a drain of about 20W while idle which is pretty bad IMHO. With the 68Wh battery it translates to about 2.5 hours battery life. Lowest I've seen for battery drain is 14W, with the screen at lowest brightness, Google Chrome turned off, disk spun down. I'm using the built-in Intel graphics and the system has 16GB of ram and a quad-core i7. I never ran windows on this laptop so I don't know what to expect but reviews are claiming 7+ hours on the 90Wh battery. That would mean an average of 13W, while doing actual work. So I'm really wondering: Is the e1000 really eating up 15W or is powertop misreporting? I already calibrated powertop, without a change. Wout.
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<div dir="ltr">kingma at <a href="http://bluewin.ch" target="_blank">bluewin.ch</a> wrote on Wed Feb 12 23:32:27 PST 2014:<div><br></div><div>> I observe a sustained high power consumption of 5- 10 W on the ehternet adaptor e1000e on a lenovo thinkgpad t430s. Such I high power drain cannot be correct can it? the total power consumption is around 25 W which is a concern for battery life.</div> <div><br></div><div>I'm noticing the same thing on my Dell Latitude E6540. It also has an e1000 and powertop reports it as being the highest consumer, at around 15W. When I unplug the system, the battery reports a drain of about 20W while idle which is pretty bad IMHO. With the 68Wh battery it translates to about 2.5 hours battery life.</div> <div><br></div><div>Lowest I've seen for battery drain is 14W, with the screen at lowest brightness, Google Chrome turned off, disk spun down. I'm using the built-in Intel graphics and the system has 16GB of ram and a quad-core i7.</div> <div><br></div><div>I never ran windows on this laptop so I don't know what to expect but reviews are claiming 7+ hours on the 90Wh battery. That would mean an average of 13W, while doing actual work.</div><div><br></div> <div>So I'm really wondering: Is the e1000 really eating up 15W or is powertop misreporting?</div><div><br></div><div>I already calibrated powertop, without a change.</div><div><br></div><div>Wout.</div></div>