So for E5-1650 v3 specifically: 0x2b works (microcode in trusty). 0x36 works with 3.13, but not with either 3.19 nor 4.3. (Pointing at intel_pstate, I think.)
** Changed in: intel-microcode (Ubuntu) Status: Incomplete => Confirmed -- 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: Intel Microcode Breaks frequency scaling in Xeon® E5-2687W v3 & E5-1650 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