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I have installed Ubuntu 16.04 with Windows 10 dual boot option. Everything works fine with Windows, but when I try to shut down or reboot the Ubuntu (Suspend works), then it never shuts down properly and I need to power it off using the power button. I need to find a workaround for this.

The following error appears:

/dev/nvme0n1p0: recovering journal
/dev/nvme0n1p0: clean, 279395/1222992 files, 2341455/4082432 blocks
[33612.774710] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [plymouthd:2764]

Any help would be appreciated!

Feel free to ask additional information.

E. Muuli
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3 Answers3

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sudo gedit /etc/init.d/alsa-utils

The file opens in Gedit and around the line 353 you'll find the instruction "stop)". Below this instruction you should add these two instructions:

ifconfig wlan0 down
ifconfig eth0 down

So, the file should be this way:

stop)
ifconfig wlan0 down
ifconfig eth0 down
EXITSTATUS=0

After doing this, save the file, close it and restart or shutdown Ubuntu and verify if the problem continues."

///or 

sudo /etc/default/grub 
find GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"=>
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force"
Marc Vanhoomissen
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Nhat Ha
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Try opening the terminal and running

sudo shutdown -h

sudo reboot -h

This will shut it down or

IntegrateThis
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Curiouskangaroo
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I had the very same issue and following Eerik Muuli's advice, everything is working just fine now.

What seemed to fix the problem for me was that I switched to the Nvidia GPU driver from the additional drivers menu.