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 <hfollm...@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 | hfollm...@itcfollmann.com
>
>
