i could solve my poweroff failure at shutdown (see message above with listings of dmsg, lspci, etc.) i used as the only kernel-boot-option:
acpi=oldboot and the shutdown with poweroff did work like in older kernel versions again. -- [lucid] unable to shut down https://bugs.launchpad.net/bugs/580867 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs