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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)

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  • Also having this problem, with no solution in sight.
    – donatello
    Apr 26, 2016 at 15:11
  • try installing graphics driver form additional software
    – surendar
    Apr 30, 2016 at 11:09

1 Answer 1

Reset to default
2

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.

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  • its working after i choose nividia driver in additional software
    – surendar
    Apr 30, 2016 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, 2016 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, 2016 at 10:49

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