Trying the kernel parameters from https://wiki.ubuntu.com/DebuggingACPI that is. acpi=off helps for the reboot/shutdown issue at least. But acpi=ht, pci=noacpi, acpi=noirq, pnpacpi=off, noapic or nolapic do not help.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1608790 Title: HP laptop freezes on reboot or shutdown (acpi issues?) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1608790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs