Modern hardware provides no way of enumerating CPUs without using ACPI, so it's normal for you to only see one if you disable ACPI. There's no way to avoid that, so please open another bug about the ACPI issue and we'll see if we can fix that.
** Changed in: linux-source-2.6.22 (Ubuntu) Status: Triaged => Won't Fix -- Only one CPU core recognized in Gutsy after updates https://bugs.launchpad.net/bugs/141082 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs