I installed Ubuntu 17.10 dual boot with Windows10 on my Dell XPS 15-9560 laptop.

I followed the instructions listed here: Ubuntu linux on Dell XPS 15 (9560)

After installation, I'm unable to shut down the system in Ubuntu. The computer displays this error message:

enter image description here

And refuses to shutdown.


Since you are using the nouveau one, you might find this thread useful. The original post is a startup error, but the 2nd answer mentions your exact shutdown error and also solved it with the nVidia binary drivers.

NMI watchdog: BUG: soft lockup - CPU#2 stuck for 23s! [plymouthd:305]

You may need to blacklist or remove the nouveau drivers. You can do that with the appropriate portion from this post, adding it in /etc/modprobe.d/

Install Nvidia driver instead of nouveau

For example, I have:

/etc/modprobe.d/nvidia-384_hybrid.conf:blacklist nouveau
/etc/modprobe.d/nvidia-384_hybrid.conf:blacklist lbm-nouveau
/etc/modprobe.d/nvidia-384_hybrid.conf:alias nouveau off
/etc/modprobe.d/nvidia-384_hybrid.conf:alias lbm-nouveau off

I had the same issue with Ubuntu 17.10 on Dell XPS 15 9560. The problem seems to be with the grub options and video driver. I manage to fix the issue by following instructions on the post https://connorkuehl.github.io/dell-inspiron-7559-linux-guide/index.html. In my case I did install the version nvidia-390 instead of nvidia-367

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