Comment 3 for bug 1914774

Works for me:

$ sudo apt install linux-tools-generic-hwe-18.04
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-4.15.0-144 linux-headers-4.15.0-144-generic linux-image-4.15.0-144-generic linux-modules-4.15.0-144-generic
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  linux-hwe-5.4-tools-5.4.0-132 linux-hwe-5.4-tools-common linux-tools-5.4.0-132-generic
The following NEW packages will be installed:
  linux-hwe-5.4-tools-5.4.0-132 linux-hwe-5.4-tools-common linux-tools-5.4.0-132-generic linux-tools-generic-hwe-18.04
0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 5270 kB of archives.
After this operation, 25.7 MB of additional disk space will be used.
Do you want to continue? [Y/n] y

$ cpupower
Usage: cpupower [-d|--debug] [-c|--cpu cpulist ] <command> [<args>]
Supported commands are:
 frequency-info
 frequency-set
 idle-info
 idle-set
 set
 info
 monitor
 help

Not all commands can make use of the -c cpulist option.

Use 'cpupower help <command>' for getting help for above commands.

$ uname -r
5.4.0-132-generic