Hello, I am having same issue. Fresh install of Ubuntu 18.04. Could not boot from bootable flash installer until I added "acpi_rev_override=1" to boot params. Kernel 4.15 would lockup after login screen. Was able to login couple of times but system would eventually lockup randomly while using it and when I tried to shutdown/restart.
I was able to install the latest kernel 4.17 in recovery mode. I can now login however when I try to shutdown/restart system locks up. So far I have not had random freezing of system while using. Main problem is shutdown/restart. Completely unresponsive even when using Ctrl+Alt+F1 or F2. Hardware: Dell XPS 15 9560, i7-7700HQ 2.8GHz Touch screen disabled in bios, no fingerprint reader If my issue is different let me know and I'll open a new bug. If there are any debugging steps you would like me to do let me know what and how and I'll be happy to assist. Thank you ** Attachment added: "kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1769376/+attachment/5136781/+files/kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1769376 Title: NMI watchdog: Watchdog detected hard LOCKUP on cpu x To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1769376/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
