Re: kernel not configured for semaphores

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On Thu, 10 May 2018 07:57:29 -0700
Paolo Galtieri <pgaltieri@xxxxxxxxx> wrote:

> Folks,
>    twice now in the last 2 days when I have sat in front of my PC I
> have found the following message on the screen:
> 
> Kernel not configured for semaphores (System V IPC). Not using udev 
> synchronization code.
> Halting.
> 
> Since I have not modified my kernel from what I downloaded when I did 
> the most recent update I don't understand why this message is
> appearing. Both times it occurred during the night because I find it
> first thing in the morning.
> 
> Anyone have any idea what is causing this message to appear?

This is probably something else other than the kernel that has a bug.
You can check if your kernel has semaphores set by going into /boot and
running 
grep -i -e 'IPC' [config file for your running kernel]
It should show something like
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_IPC_NS=y
My suspicion would fall on systemd as a cause for your problem.  But
that's just a guess based on the error message, I haven't actually
checked for the error message in the source.
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