Ubuntu 16.04 hangs on shutdown

Solution 1:

Same problem here on brand new Asus L502S. I tried Mint, Mate, Ubuntu - all the same. Problem is common. I tried everything which can be found regarding this problem over the forums.

Eventually I gave up when I found this: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1594023

Check if you issue is the same and I hope U don't waste another day on this, as I did.

Solution 2:

This worked for me, Hope you too.

I have Lubuntu 16.04.1 LTS

STEPS I DID FOR SOLVE

• Press CTRL + ALT and T
• In terminal paste sudo xedit /etc/modprobe.d/blacklist.conf
• Write your user password
• In the bottom of the windows add:

blacklist dw_dmac blacklist dw_dmac_core

• Save and Quit
• I did Follow step, but don't know if is neccesary: In the same terminal add: sudo update-grub
• Reboot once (maybe could keep with issue, force reboot) Thats It. I Did it and the PC now colud PowerOff/Reboot/Suspend and everything.

NOTICE: For this to work you will need to eraser quite splash in the Grub Steps for this:

• Press CTRL + ALT and T (open the terminal)
• Paste this sudo xedit /etc/default/grub
• Write your user password
• In the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" eraser quiet splash
• Save and Quit
• In terminal paste sudo update-grub

Notes: This work for ASER E-11 with previous Windows8.1 and now with Lubuntu 16.04.1 LTS.

Cons: In the Start or ShutDown the computer will show only console, but It'll works.

Solution 3:

I think I found the solution. I was searching for a solution for another problem: lsusb command was hanging forever, so I found this post https://ubuntuforums.org/showthread.php?t=2301619

I then remembered that I had a USB3 PCI Card plugged on the mother board but not powered, after removing it the problem is solved.

Hope it helps.