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Re: [Libreboot] on T400 with 2016-May-08 libreboot, screen does not come

From: Daniel Tarrero
Subject: Re: [Libreboot] on T400 with 2016-May-08 libreboot, screen does not come back from suspend
Date: Thu, 12 May 2016 09:52:15 +0200
User-agent: Mutt/1.5.23 (2014-03-12)

to all: try to "dont reply" emails when it's not a reply to the mail.
Regardless you "delete all" and compose a "new email" there are
background references that make this email a reply to other thing
completelly different :)

About your suspend problem, do you know if you are trying to suspend to
ram? or to disk?

Also related information will be: how do your system play "bios power
calls", i think acpi or apm are the ones responsible to tell your laptop
to suspend (and maybe they dont send the propper signal).

have you (and have you play with) the commands starting with "pm-*"
(power management whatever). Specially interesting in my ssystem is
"pm-is-supported" which tell me which suspend methods it supports.
There are also pm-suspend (suspend to ram and suspend power),
pm-hibernate (suspend to disk and power off), and pm-hibernate-hybrid
(suspend to disk but dont power off, just suspend).

Probably you want to suspend to ram (the fast modern way).

The power manager through the kernel must send the appropiate signal
to bios in order to it know what to do next time its powered on.
what makes me wonder.... is suspension supported by libreboot? :)


On Wed, May 11, 2016 at 11:54:40AM -0400, Bruno Dantas wrote:
> I just discovered this issue today. I am able to go into suspend without 
> issues. Then, when I press the power button to "wake" the laptop back from 
> suspend, it seems to react (some LEDs flash) but nothing ever shows up on the 
> screen. I end up having to do a hard reboot. I tried several times, same 
> results.

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