[Trisquel-users] Re : Computer will not shut down

[lcerf]

It looks all normal: the target "Shutdown" is reached.  The problem must be  
in the kernel.   
https://unix.stackexchange.com/questions/323383/linux-mint-18-hangs-at-shutdown  
suggests adding options (apm=power_off, acpi=force, etc.) to it (in the  
GRUB_CMDLINE_LINUX_DEFAULT variable of /etc/default/grub, unless you do not  
use the default bootloader) or disabling things in the BIOS (USB 3.0 legacy  
mode, EuP-setting, etc.).

I would first try a newer kernel. Installing the package  
"linux-image-generic-hwe-8.0" (in Trisquel's repository) will give you  
version 4.15. https://jxself.org/linux-libre/ seems down at the moment.  When  
back online, it will provide instructions to get an even newer kernel.  After  
installing the kernel you need to reboot (on the newer kernel) and try to  
shutdown to see if the newer kernel does not suffer from the same problem.