Hello Chris, I checked into the BIOS: the CPU was correctly seen as having two cores but I enabled ACPI v3.0 (vs. ACPI v1.0 previously) and I enabled APIC (vs. disabled previously). The second core is now seen!!
I'm closing the bug (-> Fix Released). Sorry for the noise. Best regards, d. ** Changed in: linux (Ubuntu) Status: New => Fix Released -- Dual Core AMD 4050e is seen as single core after upgrade to Karmic https://bugs.launchpad.net/bugs/513905 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