I did a fresh install of Ubuntu 16.04. I am facing shutdown issues often. It hangs in a terminal with the message (sometimes shutdown works):

soft lockup, cpu#4 struck for 22s

I installed Ubuntu alongside Windows 10 with secure login turned off (as it prompted to turn off secure login to install third party drivers).

(Laptop model is Dell Inspiron 7550)

  • Also having this problem, with no solution in sight. – donatello Apr 26 '16 at 15:11
  • try installing graphics driver form additional software – surendar Apr 30 '16 at 11:09

I have Dell i7559 with i7-6700HQ and GTX 960M.

After a fresh install (boot directly to the installer with nomodeset, update all packages before logging in, # dpkg-reconfigure compiz), I got this cpu lockup issue.

Then I installed Nvidia driver 364.19 from https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa and everything (shutdown, reboot and suspend) works fine now.

Hope this helps.

  • its working after i choose nividia driver in additional software – surendar Apr 30 '16 at 11:09
  • Interesting, I got a MSI WS60, similar problem, also installed the nvidia-364. Now it does at least shutdown, but it takes a minute or so. – Bram Jul 1 '16 at 15:06
  • Any idea how to fix Intel graphics, though? In my experience, the only way to fix this is to keep using nVidia instead of Intel, and this kills the battery. – TheNavigat Dec 4 '16 at 10:49

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.