Adding to the above #4, when I start the system, and before logging into ubuntu 18.04 LTS with my username and password. I opened up the console view (tty4). While shutdown down from there and reboot also works fine. I recieve no messages of cpu worker stuck as described above. I think its some other service which hangs the cpu workers(cpu resource deadlock) which starts after logging into the system for the first time. Since its a new laptop I have not installed apps or services to start with init.d and also I have put no triggers for /etc/rc* bluetooth/screen settings.
After this I tried installing nvidia drivers for gtx 1050 ti from nvidia site run file I downloaded and it gave an error for nouveau kernel driver. So I turned it off by nvidia's installer helper for this and updated ramfs and did a reboot. No issues for me now, for shutdown/reboot or random system hang after successfully running nvidia graphics. -- 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/1774531 Title: [Dell Inspiron 7577] shutdown/reboot hangs Status in linux package in Ubuntu: Expired Bug description: https://answers.launchpad.net/ubuntu-certification/+question/669743 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-22-generic 4.15.0-22.24 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Jun 1 01:19:51 2018 InstallationDate: Installed on 2018-05-30 (0 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: linux-signed UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1774531/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp