Unable to turn on or off the orca screenreader on arctica-greeter lightdm greeter using <alt>+<super>+<s>

[ricmarques]

Bug originally reported in Launchpad, for the "arctica-greeter package" present in Ubuntu MATE 20.10 and 21.04, by Ubuntu MATE's Team Member N0rbert, on 9th April 2021 (2021-04-09). Yesterday (15th October 2022), I ("ricmarques" = "Ricardo Dias Marques") have checked that this bug is still present / still happens in Ubuntu MATE 22.04.1 LTS ("Jammy Jellyfish") which uses "arctica-greeter" ("LightDM Arctica Greeter") version "0.99.1.5-2nmu3":

Bug #1923253 “Unable to turn on or off the orca screenreader on arctica-greeter lightdm greeter using <alt>+<super>+<s>” : Bugs : arctica-greeter package : Ubuntu https://bugs.launchpad.net/ubuntu/+source/arctica-greeter/+bug/1923253

Also yesterday (15th October 2022), I've added a comment - https://bugs.launchpad.net/ubuntu/+source/arctica-greeter/+bug/1923253/comments/5 - in that bug, with the following text:

This problem is also happening in my laptop computer running Ubuntu MATE 22.04.1 LTS ("Jammy Jellyfish"): when I'm in the login screen, if I press the "Alt + Windows key + S" key combination, the (Orca) Screen Reader does NOT start. The screen reader only starts if I go to the accessibility icon menu at the top of the screen and then click on the "Screen Reader" option. After I log in, the "Alt + Windows key + S" key combination works correctly in Ubuntu MATE to turn on and off the Orca screen reader.

This bug is being discussed, for instance, in the following Discussion in the "Ubuntu MATE Community" Discussion Forum:

CRITICAL! Still unable to startup orca at the login screen - Support & Help Requests - Ubuntu MATE Community https://ubuntu-mate.community/t/critical-still-unable-to-startup-orca-at-the-login-screen/25938