cat /proc/cpuinfo found the cpu family : 22 (=16h) According thread 2 https://lkml.org/lkml/2013/5/21/260, family 16h has no perfctr_core and therefore it is normal to have the error message. Later kernel also removes the WARN_ON message.
** Changed in: linux-lts-raring (Ubuntu) Status: In Progress => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1252154 Title: [Dell Inspiron 3135] Multiple CRITICAL/HIGH failures in fwts report To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1252154/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs