The bug in #4 is for Ryzen platforms, so it doesn't apply to Inspiron 5458, which seems to be a Broadwell platform.
Please update the BIOS to A16. If you still see this issue, please attach `journalctl -b -1 -k` in next boot. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1798961 Title: Random unrecoverable freezes on Ubuntu 18.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1798961/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs