Klaus, that might be a separate issue. In my case the laptop really goes into sleep (led blinks, screen off, fan off, no noticeable heat production).
I found a related report on the kernel bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=203877 ** Bug watch added: Linux Kernel Bug Tracker #203877 https://bugzilla.kernel.org/show_bug.cgi?id=203877 ** Also affects: ubuntu-release-upgrader via https://bugzilla.kernel.org/show_bug.cgi?id=203877 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1848771 Title: Reboot after resume from suspend (deep) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-upgrader/+bug/1848771/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs