I can confirm the exact same thing here. Kubuntu 15.04 intel-microcode 3.20150121.1 CPU Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz
When intel-microcode is installed the CPU frequencies are stuck between 400 and 500 Mhz, they just slightly scale between this two values. No special messages in dmesg as far as I can tell. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1480349 Title: Breaks frequency scaling in Xeon® E5-2687W v3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1480349/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
