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Ubuntu 16.04 hangs on shutdown/restart I encountered this problem before but by editing the line in the /etc/default/grub from

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force"

and run

update-grub

fixes the problem.

But after doing some heavy tasks (like web development) my laptop still hangs on shutdown/restart.

But doing some normal tasks like web browsing my device can shut and restart normally. Any suggestions?

UPDATE: There is a time that my laptop hangs on here: [ OK ] Reached target shutdown [ 6431.968956 ] xhci_hcd 0000:00:14.0: xHCI host controller not responding, assume dead [ 6431.971151 ] xhci_hcd 0000:00:14.0:HC died; cleaning up [ 6431.975210 ] reboot: Power down

  • I can not see what grub settings have to do with shutdown or with what you are doing after startup. However, sometimes I have very long shutdown times on my system as well (laptop and desktop). Long could mean 2-3minutes. After just waiting everything continues fine. No idea what it is, but I am usually very careful to force down a Linux installation on shutdown/startup. You could be causing file damage worsening your problem. – CatMan Mar 8 '18 at 18:24
  • If you remove quiet splash from the GRUB_CMDLINE_LINUX_DEFAULT, what kinds of messages do you get prior to the hang on shutdown? – dsstorefile1 Mar 8 '18 at 21:44
  • @dsstorefile I get the same Ubuntu loading hangs up. No messages. – bensu- Mar 9 '18 at 0:38
  • @Catman I got the solution of the grub settings here: askubuntu.com/questions/764568/…. At first, it worked but after some time it goes back to the hang of Ubuntu loading. – bensu- Mar 9 '18 at 0:40
  • Update to this GRUB_CMDLINE_LINUX_DEFAULT="verbose" should display list of what the os is doing during boot sequence. – Michal Przybylowicz Mar 9 '18 at 12:56
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After reinstalling Ubuntu on my laptop. I found the best way to avoid this problem. Make sure that when you install Ubuntu you must be connected to the internet so that Ubuntu will fully detect your hardware.

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