I seem to recall somebody saying that this was a permissions issue with the way ubiquity is launched from the live desktop environment. I think the comment was along the lines of ubiquity running as root but the desktop session is not so orca can't read the screen.
** Tags added: rls-jj-incoming -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to at-spi2-core in Ubuntu. https://bugs.launchpad.net/bugs/1923052 Title: screen reader does not read ubiquity window Status in at-spi2-core package in Ubuntu: Confirmed Status in orca package in Ubuntu: Confirmed Status in ubiquity package in Ubuntu: Confirmed Bug description: Steps to reproduce: 1. Run Ubuntu MATE 21.04 installation media 2. Try to follow http://iso.qa.ubuntu.com/qatracker/testcases/1309/info testcase by pressing <Alt>+<Super>+<S> to activate screenreader with shown Ubiquity window, press <Tab> to select some button Expected result: * screen reader reads ubiquity window Actual result: * screen reader does not read ubiquity window Note: screen reader actually works, it reads other windows - for example the terminal opened by <Ctrl>+<Alt>+<T>. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: ubiquity 21.04.14 ProcVersionSignature: Ubuntu 5.11.0-13.14-generic 5.11.7 Uname: Linux 5.11.0-13-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu61 Architecture: amd64 CasperMD5CheckResult: pass CasperVersion: 1.461 Date: Thu Apr 8 13:01:30 2021 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash --- LiveMediaBuild: Ubuntu-MATE 21.04 "Hirsute Hippo" - Beta amd64 (20210407.1) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/at-spi2-core/+bug/1923052/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp