Comment 12 for bug 1231091

@hellsworth, nice catch. That could be an issue.

As you noticed, bug #1874283 is duplicate of this. I'll try to combine the two with current status, to best of my understanding and testing.

1) When we hear the sound, we can start orca screen reader with Super+Alt+s. No audio feedback for the screen, language selection or choosing one of 'Try Ubuntu (MATE)' or 'Install Ubuntu (MATE)'.
 - Current status: Audio feedback available in Ubuntu default but not in Ubuntu MATE.

2) Some commented that if they boot into efi mode the screen reader installer worked fine but had problem only in BIOS mode.
 - Current status: Both modes have problems (definitely 20.10 onwards).

3) Some commented that if they used live mode (Try Ubuntu), the screenreader worked fine for installation but not if they choose installer directly (Install Ubuntu).
 - Current status: Screen reader does not work if installer started from inside live mode both in Ubuntu default and Ubuntu MATE.

4) On the other hand, we were suggested quite the opposite; that it will work fine if we select installer directly but not if we select live mode first.
 - Current status: Screenreader works when starting installer directly only for Ubuntu default. No luck on Ubuntu MATE.

5) Screen reader works if we start assistive technology in live mode (Thanks @artemiy-22).
 - Current status: This works in Ubuntu MATE (could not get it to work on Ubuntu 20.04).

Following are steps to make screenreader install work in Ubuntu MATE.
  a) Select 'Try Ubuntu'
  b) Once the desktop loads, open 'Assistive Technologies Preferences' and check 'enable assistive technologies'. This I had to do even when screenreader was on (Alt+Super+s).
  c) Choose 'Close and Log Out'. (Just using 'Close' does not work, we have to end the current session).
  d) Select 'Live session user' in the login screen and hit return (no password).
  e) After we re-login and start the screenreader, we can use installer in blind user mode.