DPMS support removed?

[G.M.]

I have a script in which I used:
xset dpms standby 0 ; xset dpms suspend 0 ; xset dpms off 0

Today, when I run the script, I get:
$ xset dpms standby 0
xset: unknown option standby
[...synopsis of available commands...]
$ xset dpms suspend 0
xset: unknown option suspend
[...]

However, reading the synopsis that is output after the error, I read:
    To control Energy Star (DPMS) features:
        -dpms Energy Star features off
        +dpms Energy Star features on
         dpms [standby [suspend [off]]]
              force standby
              force suspend
              force off
              force on
              (also implicitly enables DPMS features)
              a timeout value of zero disables the mode

So standby and suspend are suposed to exist...

There is either a bug in the code or in the doc!

$ cat /etc/issue
Ubuntu 16.04 LTS \n \l
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04 LTS"

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

Ubuntu 16.04 (xenial) reached end-of-standard-support on April 29, 2021.

This release of Ubuntu is no longer receiving maintenance updates. Is this issue still relevant when using a currently supported release of Ubuntu? If so then please let us know otherwise this report can be left to expire in approximately 60 days time.

[Launchpad Janitor (janitor)]

[Expired for Ubuntu because there has been no activity for 60 days.]