Re: laptop reboots right after hibernation

On Thursday, 22 of November 2007, Tomas Carnecky wrote:
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

Well, I suspect so. We've already had a similar report and there are some
problems that seem to be related to it with some boxes. Still, nobody knows
what the problem really is so far.

or are users supposed to unload ehci_hcd each time before hibernation?

As a (hopefully temporary) workaround.

In the former case, I'd be willing to help debug.

We have yet to figure out how to do that. :-)

Greetings,
Rafael
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