Ran into this problem on my Dell 7010 i5 desktop machine, after doing a fresh 16.10 install -- first time it's happened with any OS that I've run on it.
In my case, I'm getting DRDY ERRs on shutdown/restart. Hangs for several minutes with my SSD activity light lit up solid. Eventually the errors time out, and it shuts down, but it's a painfully long process. I downgraded the kernel to 4.4.x for shiggles. The LTS enablement stack, graphic stack, and so forth were foobar, of course, but it otherwise booted and shutdown normally. It smells like a kernel bug, to me, at this point. I'll investigate further and post back, if I can put a finger on it. -- 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp