I remove package desktop-session-antix and switch login manager from Slim to LigtDM.

My issue is that, if I run pkill -u $USER or sudo reboot computer always shutdown.

Thanks.

google search"lightdm shutdown not working" finds a lot of matches.

I don't quite understand your post.
Isn't it reasonable to expect"sudo reboot" would shutdown the computer?

skidoo wrote:I don't quite understand your post.
Isn't it reasonable to expect"sudo reboot" would shutdown the computer?

I wonder if it is a language thing? Perhaps he means it powers off and stays that way rather than performing the expected reboot.

SamK wrote:

skidoo wrote:I don't quite understand your post.
Isn't it reasonable to expect"sudo reboot" would shutdown the computer?

I wonder if it is a language thing? Perhaps he means it powers off and stays that way rather than performing the expected reboot.

Yes

try this:
sudo dpkg-reconfigre lightdm

then power down and restart your machine.
Restart and again test whether the following command now performs the expected result:
sudo reboot now