linux-kernel - Re: laptop reboots right after hibernation

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Message-ID: <47456F28.3070307@dbservice.com>
Date:	Thu, 22 Nov 2007 12:59:36 +0100
From:	Tomas Carnecky <tom@...ervice.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Pavel Machek <pavel@....cz>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: laptop reboots right after hibernation

Rafael J. Wysocki wrote:
> On Sunday, 18 of November 2007, Tomas Carnecky wrote:
>> Pavel Machek wrote:
>>> Hi!
>>>
>>>> echo disk > /sys/power/state
>>>>
>>>> successfully saves that state to the disk, but just as the laptop is
>>>> about to turn itself off, it reboots (successfully, so the
>>>> hibernation/resume process works well, even with X running! which is
>>>> awesome :) ). But I'd rather like the computer turned off after I
>>>> hibernate it. Where could the problem be?
>>>>
>>>> It's a new laptop, TP X61 tablet, I tried ubuntu (7.10, gutsy) for a few
>>>> days, both suspend and hibernate worked there (with one or two crashes,
>>>> probably due to X, I've read that the intel driver got some
>>>> suspend/resume improvements recently). Now I'm running gentoo, kernel
>>>> 2.6.24-rc2. I'm using newer versions of almost all software now compared
>>>> to the ubuntu system.
>>> If it works in older ubuntu, you can probably do bisect. Does normal
>>> shutdown work? You can try platform vs. shutdown mode...
>> I forgot, normal shutdown (init 0) works, the 'shutdown' command fails
>> somewhere in the gentoo init scripts, but that has nothing to do with
>> the kernel. 'init 6' also works. Both regardless of where the notebook
>> is (dock or outside).
> 
> Please verify if you have the ehci_hcd driver loaded when the box is in the
> dock.  If so, please try to unload it before hibernation and see if the box
> will reboot.

I had to recompile the kernel because I have a monolithic kernel with as
many components as possible compiled in. But after I disabled the whole
USB subsystem, the laptop doesn't reboot anymore after hibernation. Is
that a bug in the usb driver or are users supposed to unload ehci_hcd
each time before hibernation? In the former case, I'd be willing to help
debug.

tom
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