OK, as expected linux-firmware upgrade seems to be unrelated. After doing more than two dozen shutdowns with each kernel (4.15.0-10 and 4.15.0-12) I see the following pattern:
* secure boot enabled or disabled makes no difference * kernel 4.15.0-10 correctly powers off system (halt -p) every time, power source makes no difference * kernel 4.15.0-12 correctly powers off system only when running on AC * kernel 4.15.0-12 does NOT power off system (reboots instead) when AC power is NOT connected (running on battery) every time ** Summary changed: - Kernel 4.15.0-12 reboots instead of turning off on HP Spectre x360 13-ae004 + Kernel 4.15.0-12 reboots instead of turning off on HP Spectre x360 13-ae004 on battery -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1756455 Title: Kernel 4.15.0-12 reboots instead of turning off on HP Spectre x360 13-ae004 on battery To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1756455/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
