does T400 consume power if shutdown with hibernate option

T400/410/420 and T500/510/520 series specific matters only
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T400plus
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does T400 consume power if shutdown with hibernate option

#1 Post by T400plus » Thu Feb 19, 2009 9:54 am


All my experience + understanding down the drain.
Lenovo support centre informs me that their T400 consumes power even in hibernate mode and it is natural !.
Please comment , so that i can collect the wisdom of more seasoned thinkpad users and wisen myself.
I happen to be in Mumbai,India. Lenovo's support desk is at Banglore and it takes a lot of tries to get them
to try to help you.

Marin85
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Re: does T400 consume power if shutdown with hibernate option

#2 Post by Marin85 » Thu Feb 19, 2009 10:13 am

Unlike suspend to RAM, suspend to disk (hibernation) is not supposed to drain any power. However, if hybrid sleep is enabled, it´s a combination of suspend to disk and suspend to RAM, which would then drain power. Hence I don´t think that it´s normal for any recent laptop to drain power while in hibernation (that would indicate some problem with the particular machine or design flaw, but not really design intention).

Marin
IBM Lenovo Z61p | 15.4'' WUXGA | Intel Core 2 Duo T7400 2x 2.16GHz | 4 GB Kingston HyperX | Hitachi 7K500 500 GB + WD 1TB (USB) | ATI Mobility FireGL V5200 | ThinkPad Atheros a/b/g | Analog Devices AD1981HD | Win 7 x86 + ArchLinux 2009.08 x64 (number crunching)

dr_st
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Re: does T400 consume power if shutdown with hibernate option

#3 Post by dr_st » Thu Feb 19, 2009 10:30 am

The problem of laptop consuming power while in hibernate (which is not normal) has been seen on many different laptops. There is a long thread on it here somewhere (I think someone with an X61 reported it, and immediately got replies from other people encountering it on other laptops).

The LAN device is often to blame, and the solution is to disable all the various wake features in the BIOS and the driver. However, sometimes there are other causes.
Current: X220 4291-4BG, T410 2537-R46, T60 1952-F76, T60 2007-QPG, T42 2373-F7G
Collectibles: T430s (IPS FHD + Classic Keyboard), X32 (IPS Screen)
Retired: X61 7673-V2V, A31p w/ Ultrabay Numpad
Past: Z61t 9440-A23, T60 2623-D3U, X32 2884-M5U

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