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[QUERY] Power consumption on a 2013 MBP
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Ramkumar Ramachandra
Dec 31, 2013, 10:00:02 AM12/31/13
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Hi,
On a 2013 Macbook Pro, Linux consumes 21W of power while OS X consumes
just 9W. I found this very disturbing; Linux more than halves the
battery life of the device. I checked to see that I wasn't running any
especially power-hungry applications or drivers (using powertop). I'm
using just one proprietary driver: the broadcom-wl wireless driver;
otherwise, I'm running the stock 3.12 kernel from Arch's repositories.
How do I figure out what is consuming power, and what can I do to help
minimize consumption?
Thanks.
Ram
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On a 2013 Macbook Pro, Linux consumes 21W of power while OS X consumes
just 9W. I found this very disturbing; Linux more than halves the
battery life of the device. I checked to see that I wasn't running any
especially power-hungry applications or drivers (using powertop). I'm
using just one proprietary driver: the broadcom-wl wireless driver;
otherwise, I'm running the stock 3.12 kernel from Arch's repositories.
How do I figure out what is consuming power, and what can I do to help
minimize consumption?
Thanks.
Ram
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To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majo...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Pavel Machek
Jan 6, 2014, 9:20:03 PM1/6/14
to
On Tue 2013-12-31 15:24:00, Ramkumar Ramachandra wrote:
> Hi,
>
> On a 2013 Macbook Pro, Linux consumes 21W of power while OS X consumes
> just 9W. I found this very disturbing; Linux more than halves the
> battery life of the device. I checked to see that I wasn't running any
> especially power-hungry applications or drivers (using powertop). I'm
> using just one proprietary driver: the broadcom-wl wireless driver;
> otherwise, I'm running the stock 3.12 kernel from Arch's repositories.
>
> How do I figure out what is consuming power, and what can I do to help
> minimize consumption?
USB usually does that. Try rmmoding hcd(s). If that does not help, try
> Hi,
>
> On a 2013 Macbook Pro, Linux consumes 21W of power while OS X consumes
> just 9W. I found this very disturbing; Linux more than halves the
> battery life of the device. I checked to see that I wasn't running any
> especially power-hungry applications or drivers (using powertop). I'm
> using just one proprietary driver: the broadcom-wl wireless driver;
> otherwise, I'm running the stock 3.12 kernel from Arch's repositories.
>
> How do I figure out what is consuming power, and what can I do to help
> minimize consumption?
removing other modules. Oh and try without that broadcom-wl driver.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
Ramkumar Ramachandra
Jan 6, 2014, 9:30:04 PM1/6/14
to
Pavel Machek wrote:
> USB usually does that. Try rmmoding hcd(s). If that does not help, try
> removing other modules. Oh and try without that broadcom-wl driver.
Unused modules shouldn't consume so much power, no? I suspected
> USB usually does that. Try rmmoding hcd(s). If that does not help, try
> removing other modules. Oh and try without that broadcom-wl driver.
broadcom-wl, but removing it doesn't help. Instead of shooting in the
dark, is there some tool that I can use to figure out the culprits?
Thanks.
Pavel Machek
Jan 6, 2014, 9:40:04 PM1/6/14
to
On Tue 2014-01-07 02:47:18, Ramkumar Ramachandra wrote:
> Pavel Machek wrote:
> > USB usually does that. Try rmmoding hcd(s). If that does not help, try
> > removing other modules. Oh and try without that broadcom-wl driver.
>
> Unused modules shouldn't consume so much power, no? I suspected
> broadcom-wl, but removing it doesn't help. Instead of shooting in the
> dark, is there some tool that I can use to figure out the culprits?
"Should not". Exactly. Your machine should not consume 20W. It does,
> Pavel Machek wrote:
> > USB usually does that. Try rmmoding hcd(s). If that does not help, try
> > removing other modules. Oh and try without that broadcom-wl driver.
>
> Unused modules shouldn't consume so much power, no? I suspected
> broadcom-wl, but removing it doesn't help. Instead of shooting in the
> dark, is there some tool that I can use to figure out the culprits?
so try rmmoding USB modules, and probably AHCI...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
Ramkumar Ramachandra
Jan 6, 2014, 11:10:04 PM1/6/14
to
Pavel Machek wrote:
> "Should not". Exactly. Your machine should not consume 20W. It does,
> so try rmmoding USB modules, and probably AHCI...
My system freezes if I remove modules like usbhci, ahci, ehci_hcd.
> "Should not". Exactly. Your machine should not consume 20W. It does,
> so try rmmoding USB modules, and probably AHCI...
Pavel Machek
Jan 7, 2014, 12:30:02 AM1/7/14
to
On Tue 2014-01-07 04:35:04, Ramkumar Ramachandra wrote:
> Pavel Machek wrote:
> > "Should not". Exactly. Your machine should not consume 20W. It does,
> > so try rmmoding USB modules, and probably AHCI...
>
> My system freezes if I remove modules like usbhci, ahci, ehci_hcd.
Umm. Try harder. Like booting init=/bin/bash and not inserting them in
> Pavel Machek wrote:
> > "Should not". Exactly. Your machine should not consume 20W. It does,
> > so try rmmoding USB modules, and probably AHCI...
>
> My system freezes if I remove modules like usbhci, ahci, ehci_hcd.
the first place.
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
Ramkumar Ramachandra
Jan 7, 2014, 10:40:02 AM1/7/14
to
Ramkumar Ramachandra wrote:
> My system freezes if I remove modules like usbhci, ahci, ehci_hcd.
Correction: my input devices (keyboard, trackpad) depend on usbhci,
> My system freezes if I remove modules like usbhci, ahci, ehci_hcd.
ehci_hcd, while libata and my hard disk drivers depend on ahci;
there's no way I can do without them. I'm trying to get VGA switcheroo
to work so I can switch to the onboard i915 graphics card in the hope
of saving power.
Pavel Machek
Jan 7, 2014, 12:30:02 PM1/7/14
to
On Tue 2014-01-07 16:03:00, Ramkumar Ramachandra wrote:
> Ramkumar Ramachandra wrote:
> > My system freezes if I remove modules like usbhci, ahci, ehci_hcd.
>
> Correction: my input devices (keyboard, trackpad) depend on usbhci,
> ehci_hcd, while libata and my hard disk drivers depend on ahci;
> there's no way I can do without them.
Ramdisk, scripts.
> Ramkumar Ramachandra wrote:
> > My system freezes if I remove modules like usbhci, ahci, ehci_hcd.
>
> Correction: my input devices (keyboard, trackpad) depend on usbhci,
> ehci_hcd, while libata and my hard disk drivers depend on ahci;
> there's no way I can do without them.
>I'm trying to get VGA switcheroo
> to work so I can switch to the onboard i915 graphics card in the hope
> of saving power.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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