Q:

Why is my CPU Frequency stuck?

After recent routine upgrades, I've noticed that I'm unable to change my CPU frequency manually. The system is doing it automatically, and choosing the highest frequency possible, which causes it to run hot (it already has heating issues).
Most of the fixes I found are on threads from 2010 or earlier, and are no longer applicable.
Here is the output of cpufreq-info:
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 800 MHz - 1.80 GHz
  available frequency steps: 1.80 GHz, 1.80 GHz, 1.20 GHz, 800 MHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 1.80 GHz and 1.80 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.80 GHz.
  cpufreq stats: 1.80 GHz:77.10%, 1.80 GHz:0.01%, 1.20 GHz:22.86%, 800 MHz:0.02%  (74)
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 1
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 10.0 us.
  hardware limits: 800 MHz - 1.80 GHz
  available frequency steps: 1.80 GHz, 1.80 GHz, 1.20 GHz, 800 MHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 1.80 GHz and 1.80 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.80 GHz.
  cpufreq stats: 1.80 GHz:77.09%, 1.80 GHz:0.02%, 1.20 GHz:22.88%, 800 MHz:0.02%  (73)

The output of cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:
1801000

A:

Turns out the problem was cpufreqd, which had gotten pulled in when I installed Ubuntu MATE Desktop. Removing it returned control to the system and now I can use my system without it unnecessarily overheating.

