Hi!
Thinkpad has missfeature that it refuses to go to sleep "when network card is in use". Take a look at their user manual, it is described in there!
==========================
>From: Shigeo Tanai <xc6s-tni@asahi-net.or.jp>
>To: David Hinds <dhinds@valinux.com>
>Cc: linux-kernel@vger.rutgers.edu; "Justin C . Darby" <windex@busprod.com>
>Subject: Ke: 2.2.14/APM: Thinkpad 560 can suspend/hibernate only once
>Date: Thu, Jun 22, 2000 10:30 PM
>
>At 15:29 00/06/20 -0700, David Hinds wrote:
>> I have good reason to think it is not a 3Com issue, because I have
>> copies of almost every 3Com PCMCIA card that has ever been made, and
>> I've tested them on several laptops. And I developed these drivers,
>> and I know from first principles that no PCMCIA card, no matter how
>> quirky, should be able to interfere with an APM suspend. So these
>> problems have to either be with APM or with the core PCMCIA support,
>> not with the 3Com cards or drivers.
>
>I would like to second your thought, based on my experience I have with
>IBM Thinkpad 570.
>
>As it is reported by others, I can put my TP570 to sleep if I use
>'apm -s' command, regardless of whether I'm on power, or whether
>I have 3Com PCMCIA card. But if I try to put it sleep by pressing
>Fn+F4, BIOS (not apmd or kapmd) makes high&low beep and refuses
>to go to sleep. When that happens, suspend event is not issued so
>apm daemon cannot do anything. However if I issue 'cardctl suspend'
>beforehand or unplug the power prior to pressing Fn+F4, it will go
>to sleep.
>
>I do not have sufficient understanding as to IOCTL call used in
>cardctl, but as far as I can tell, APM BIOS catches something
>and it thinks it's ok to sleep if it is asked next time.
>
>Additionally, I have another to reason to rule 3Com cards or drivers
>as culprit, because same thing is observed when I use NE2000 compatible
>PCMCIA card.
>
>
>Best regards,
>
>Geo
>
>
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