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116 Posts

02-06-2011

United States of America

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  • Message 1 of 18

T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-13, 11:22 AM

Hello,

 

I have a T530 quad core, which means I need the 135W power adapter.  I was flying yesterday and my seat had power, so I figured I would use the "Airplane In-Seat Power Mode" function on Power Manager to avoid tripping any breakers on the airplane.  However (and I've tried this at home as well on AC mains), choosing the airplane in-seat power mode doesn't seem to result in the advertised "adjusting charge rate and cpu" - instead it just causes the laptop to not charge at all and say this:

 

"This AC adapter may not provide enough power to your Lenovo computer. Please reconnect the proper AC adapter."

 

Of course... it is the right adapter... and switching off Airplane Power Mode makes it start charging normally again immediately.

 

I have the BIOS update needed that says it enables this feature (1.12), and Power Manager 6.32.

 

Has anyone else tried Airplane In-Seat Power Mode and had it work, or can anyone from Lenovo comment on this?

 

THANKS!

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2445 Posts

03-09-2012

Canada

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  • Message 2 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-13, 12:39 PM
It will be a bugger just to take another flight to effectively test it again. LOL

Maybe from a 12V auto socket.
T520 Model 4239 Intel(R) Core(TM) i7-2860QMbr>; Nvidia NVS 4200M Win 10 64bit
Z70-80 I7 - 5500U 16GB GB - 1TB HD Win 10 64bit FHD 17.3", G840 w/2GB

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6855 Posts

10-29-2009

United States of America

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  • Message 3 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-13, 17:22 PM

It sounds like a bug.  I am checking on it.  I'll report back here if I find out anything...

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116 Posts

02-06-2011

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  • Message 4 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-14, 4:35 AM

Great - thank you!  I fly 4 flights a week and worrying about whether I will melt the plastic in my in-seat-power is one less thing I'd like on my mind.

 

 

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2029 Posts

12-02-2007

Australia

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  • Message 5 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-14, 11:00 AM

brillat wrote:

 

choosing the airplane in-seat power mode doesn't seem to result in the advertised "adjusting charge rate and cpu" - instead it just causes the laptop to not charge at all

 


The fine print on at-seat-power for many airlines specifically excludes "battery charging" as a permitted use, so it may well have something to do with that restriction.

 

Will there be enough power for my device (how many watts can it handle)?

Most airplane power systems are limited to approximately 75 Watts of power draw per seat. This means that a new 17" laptop, with a power-hungry processor, might not get enough juice to operate. Sometimes the laptop will know not to charge the battery and will just operate via the power, but other times the laptop won't work at all, or will work for a short period of time before tripping the power circuit. You can try taking your battery out all together, or buy a smaller laptop.

The SeatGuru power converter reviewers recommend removing the laptop battery before plugging the device into the EmPower unit. The laptop should then run on EmPower. Often, about one hour to 30 minutes before the end of a flight, the EmPower system will be as shut-off, and the laptop will abruptly lose power. (Make sure to save your work!)

 

Will my battery charge while I'm plugged in?

Don't count on it. Again, because of the limited amount of power draw per seat, it is possible that your laptop won't get enough power to both operate and charge. Some airlines, like Continental Airlines, specifically state that battery charging is not allowed and ask you to remove your rechargeable battery from your device.

- http://www.seatguru.com/articles/in-seat_laptop_power.php

 

Cheers,

 

Bill

------------------------------
I don't work for Lenovo
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116 Posts

02-06-2011

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Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-14, 11:30 AM

Not here in the US, use the plug for whatever you want.  Electric razors are also specifically allowed during all phases of flight (takeoff and landing, too!) which has always sounded slightly dangerous.... no e-readers but go ahead and hold some spinning blades near your face??? We also don't have EmPower anymore, they replaced it all with 110V AC.  The rules you are reading are old (Continental doesn't exist any more) and related to the old round 20V EmPower systems.  See how there is no fine print here:

http://www.delta.com/traveling_checkin/inflight_services/products/power.jsp

http://www.united.com/web/en-US/content/travel/inflight/connectivity/default.aspx

American Airlines lists 75W max.

also regarding electric shavers, see here:

http://www.delta.com/traveling_checkin/inflight_services/connectivity/personal_electronic_devices/index.jsp

 

 

At any rate, this problem doesn't actually relate to the power offered by the airline - you can do this experiment at home plugged in to the wall.

 

Turn on "airline in-seat power mode" and you'll see that your computer immediately rejects your power adapter, and that the battery starts DISCHARGING as if you have completely unplugged the adapter.  Clearly not the intended behavior.  Presumably the correct behavior would be for it to run the laptop and either charge or not charge the battery in order to maintain power draw below some arbitrary level of power usage, I'd suggest maybe 65W so that you could also use this as an emergency way to make your computer run off of a 65W power adapter if something happens to yours and you need to borrow a smaller one.   According to my power meter my T530 i7-3610QM draws something like 30W most of the time anyway so running off 65W should be no problem.

 

 

 

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6855 Posts

10-29-2009

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  • Message 7 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-14, 14:50 PM

I think the answer is that the systems that use 135W or 170W AC adapter don't support airplane power mode.  So the bug is that Power Manager gives you this option which is not really available for your system.  I am still trying to confirm this.

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116 Posts

02-06-2011

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  • Message 8 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-14, 14:56 PM

Really?  How can that be?  Seems those are the only systems that really need it - If your system doesn't draw more than 75W or so to begin with (and certainly anything compatible with the 65W power adapter doesn't) - then you don't need this feature.

 

The whole idea would be with a machine that DOES use a 135W/170W adapter to limit that system down to for example below 75W, by maybe not charging the battery but running the CPU off AC power.  Or charging the battery just really, really slowly.  Or maybe turning off 1 core, or the GPU, etc.

 

It's a really awesome idea, actually - I hope they can get it working.

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414 Posts

07-19-2012

Raleigh, NC

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  • Message 9 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-14, 15:40 PM

Hello brillat,

 

I have a T530 but I am unable to find this airplane mode on it.  I updated all my drivers and BIOS and everything else you can think of.  But I still can't find the airplane mode.  I looked up the airplane mode online and found this on the support site.

http://support.lenovo.com/en_NL/downloads/detail.page?DocID=HT062667

As you can see on the affected configurations tab the only computer listed is the X1.  This may explain why it won't work on your computer.

 

My question is what version of Power Manager do you currently have installed on your computer?  I have a theory that you updated or downloaded the Power Manager program and driver from the Lenovo Update.  Is this true? Or did you download it from the support site?

 

Hope this helps,

 

Alex

 


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987 Posts

06-03-2011

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  • Message 10 of 18

Re: T530 Airplane In-Seat Power Mode = reject power adapter

2012-08-14, 17:25 PM

wrote:

Really?  How can that be?  Seems those are the only systems that really need it - If your system doesn't draw more than 75W or so to begin with (and certainly anything compatible with the 65W power adapter doesn't) - then you don't need this feature.

 

The whole idea would be with a machine that DOES use a 135W/170W adapter to limit that system down to for example below 75W, by maybe not charging the battery but running the CPU off AC power.  Or charging the battery just really, really slowly.  Or maybe turning off 1 core, or the GPU, etc.

 

It's a really awesome idea, actually - I hope they can get it working.


The T420 needs this feature. It can draw 1,999,825 watts without Turbo enabled. I imagine even if they did get it working, there would be some interesting design decisions to make. If the user decides to do some number-crunching on the plane, do you throttle down or hit the battery and allow the number-crunching to happen?

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