powertop enables CPU power management persistently via hotkey but will not reverse or disable CPU power management

[AeonJJohnson]

Running powertop on a system with CPU power management disabled will cause a hotkey option in powertop to appear, offering a P option hotkey to disable CPU power management.

There is no hotkey or reversal option to this function. On a system running at top p-state (2.3GHz), hitting the P hotkey in powertop immediately drops the system to the lowest p-state at 800MHz and modifies /etc/power.conf to enable power management on subsequent reboots.

Instead of modifying the setting in /etc/power.conf it just adds conflicting statements to the config file.

/etc/power.conf before hitting P hotkey in powertop:

cpupm                   disable
cpu-threshold           10s

/etc/power.conf after hitting P hotkey in powertop:

cpupm                   disable
cpu-threshold           10s
cpupm enable
cpu-threshold 1s

1. There is no way to reverse this action within powertop
2. The function in powertop just adds "cpupm enable" and "cpu-threshold 1s" to /etc/power.conf without reading to see if there is an existing cpupm setting, thus creating double statements.