The upstream kernel did not fix the issue. Yet, cpufreq behaves differently now (my guess: different/missing kernel modules):

> cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to <email address hidden>, please.
analyzing CPU 0:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 2.64 GHz.
analyzing CPU 1:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 1
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 3.17 GHz.
analyzing CPU 2:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 2
  CPUs which need to have their frequency coordinated by software: 2
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 3.24 GHz.
analyzing CPU 3:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 3
  CPUs which need to have their frequency coordinated by software: 3
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 2.45 GHz.
analyzing CPU 4:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 4
  CPUs which need to have their frequency coordinated by software: 4
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 3.79 GHz.
analyzing CPU 5:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 5
  CPUs which need to have their frequency coordinated by software: 5
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 3.65 GHz.
analyzing CPU 6:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 6
  CPUs which need to have their frequency coordinated by software: 6
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 3.62 GHz.
analyzing CPU 7:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 7
  CPUs which need to have their frequency coordinated by software: 7
  maximum transition latency: 0.97 ms.
  hardware limits: 1.60 GHz - 3.90 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 3.90 GHz and 3.90 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 3.60 GHz.