I think we've only observed this build failure on machines that aren't ThinkPads, which may be expected behavior. The tp-smapi-dkms package was pulled in as a transitive, optional dependency of plainbox-provider-sru:
$ aptitude why tp-smapi-dkms i plainbox-provider-sru Depends plainbox-provider-certification-client i A plainbox-provider-certification-client Recommends hdapsd i A hdapsd Recommends tp-smapi-dkms | tp-smapi-source -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1877966 Title: Failed to build tp-smapi dkms on xenial-hwe 4.15 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tp-smapi/+bug/1877966/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs