I do have the same problem since Ubuntu 17.14, it doesn't matter if it is Ubuntu distribution or any of its flavours (e.g. Kubuntu which I am using currently). I do not remember if it worked fine on 16.04, all I can tell I was always doing distro upgrade and haven't installed fresh Ubuntu installation since 16.04.
Laptop is Dell Inspiron 7548. There are various blog or forum posts about this issue, mostly suggesting to edit grub (some about editing defaulTimeout in system.conf), unfortunatelly editing acpi settings or editing anything similar doesn't work. I do not use any custom ppa other than google/chrome. Means I am using stock/distro mesa drivers too. The laptop freezes on splash logo only during shutdown (reboot works fine). I have noticed that laptop freezes on poweroff command (visible on nosplash). The laptop sometimes doesn't freeze when battery is not fully charged, the less battery is charged the lesser chances that laptop will freeze. On 15-30% of battery laptop does shutdown fine, never noticed freeze. But when battery is 90% or fully charged, or charging, the freeze almost always happens. This laptop does have battery test in UEFI, test says battery is in fine condition. Anybody else noticed any connection with shutdown freezes and battery? One more thing worth noting, once following some another forum posts I have edited reboot command behaviour to shutdown laptop, laptop did shutdown always after invoking reboot, even when battery was fully charged and charging. But I have reverted this change because I need reboot more than shutdown. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1594023 Title: Poweroff or reboot hangs. Laptop won't shutdown. 16.04 Status in linux package in Ubuntu: Confirmed Bug description: This is about a fresh Ubuntu 16.04 install on a new laptop (asus x540sa). After pressing the shutdown button in the start menu; the shutdown procedure starts and in the final splash screen the system just hangs. Tried a second time by pressing Esc once the splash screen showed up and I saw that it reaches the line "Reached target shutdown" and just stops there, no matter how long I leave it there the machine won't turn off. I also tried a Kubuntu 16.04 fresh install on the same machine and it hanged too at the final splash screen where the pulsating logo stopped. Then I tried with Esc only to see the exact same line in the end. The issue seems to affect lately quite many users as shown by the google results of the past month / week or so. I have also tried shutting down from the console with shutdown -and all the parameters after that suggested online- and sudo poweroff but unfortunately they didn't do the trick. The exact same situation occurred. Unmounting the swap as suggested online doesn't work. Also rebooting the system is not working either due to the same issue. So right now the only way for me to poweroff the machine is to press the power button on the keyboard continuously. Reproducible: Always Steps to Reproduce: 1.Install OS 2.Do something, anything or nothing 3.Try to shutdown or reboot Actual Results: The computer is not shutting down: "Reached target shutdown" and hangs there. Expected Results: Powering off the machine. For what it's worth, closing the lid won't suspend the system, but using the menu buttons for suspension will do it. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1594023/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp