Re: New Kernel fails to boot when laptop is plugged in

[Forest Dean Feighner <forest.feighner@gmail.com>]

You might try some kernel parameters.

"    ignore_loglevel    [KNL]
            Ignore loglevel setting - this will print /all/
            kernel messages to the console. Useful for debugging.
            We also add it as printk module parameter, so users
            could change it dynamically, usually by
            /sys/module/printk/parameters/ignore_loglevel.
"

Quite a few could be helpful in finding the error:

https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html

hth

Forest

On Fri, Feb 9, 2018 at 7:17 AM, Henning Follmann <hfollmann@itcfollmann.com> wrote:

Hello,
I have a strange issue with the newest kernel
4.9.0-5-amd64 on this 2011 Macbook Pro.
As far as I can see it has to do with the power management of this laptop.
Whenever the laptop is on power supply the boot process stops hard after
I enter the passphrase for the encrypted lvm. There is one last message
that it tries to mount root but it stops hard there. There is also no log
(of course not because there is no device to write to yet).
when I unplug the laptop during boot it boots fine.
Previous kernel do not show this behavior.

-H

--
Henning Follmann           | hfollmann@itcfollmann.com