I tested an upgrade in a chroot from focal to jammy with -proposed enabled (since ubuntu-release-upgrader will disable -proposed) and I did not receive a conffile prompt.
Setting up speech-dispatcher (0.11.1-1ubuntu1) ...
Installing new version of config file /etc/speech-dispatcher/modules/cicero.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/dtk-generic.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/epos-generic.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/espeak-mbrola-generic.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/espeak-ng-mbrola-generic.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/espeak-ng.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/espeak.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/festival.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/flite.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/llia_phon-generic.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/mary-generic.conf ...
Installing new version of config file /etc/speech-dispatcher/modules/swift-generic.conf ...
Installing new version of config file /etc/speech-dispatcher/speechd.conf ...
Removing obsolete conffile /etc/speech-dispatcher/modules/espeak-generic.conf ...
Removing obsolete conffile /etc/speech-dispatcher/modules/pico-generic.conf ...
Removing obsolete conffile /etc/speech-dispatcher/modules/ivona.conf ...
Removing obsolete conffile /etc/speech-dispatcher/modules/baratinoo.conf ...
Removing obsolete conffile /etc/speech-dispatcher/modules/ibmtts.conf ...
Removing obsolete conffile /etc/speech-dispatcher/modules/kali.conf ...
Setting up libgssapi3-heimdal:amd64 (7.7.0+dfsg-3ubuntu1) ...
Setting up g++-9 (9.4.0-5ubuntu1) ...
Setting up g++ (4:11.2.0-1ubuntu1) ...
Setting up gnupg (2.2.27-3ubuntu2.1) ...
Setting up build-essential (12.9ubuntu3) ...
Processing triggers for libc-bin (2.35-0ubuntu3.1) ...
(focal-amd64)root@impulse:~# grep proposed /etc/apt/sources.list
deb http://192.168.10.7/ubuntu/ jammy-proposed main restricted universe multiverse
deb-src http://192.168.10.7/ubuntu/ jammy-proposed main restricted universe multiverse
I tested an upgrade in a chroot from focal to jammy with -proposed enabled (since ubuntu- release- upgrader will disable -proposed) and I did not receive a conffile prompt.
Setting up speech-dispatcher (0.11.1-1ubuntu1) ... dispatcher/ modules/ cicero. conf ... dispatcher/ modules/ dtk-generic. conf ... dispatcher/ modules/ epos-generic. conf ... dispatcher/ modules/ espeak- mbrola- generic. conf ... dispatcher/ modules/ espeak- ng-mbrola- generic. conf ... dispatcher/ modules/ espeak- ng.conf ... dispatcher/ modules/ espeak. conf ... dispatcher/ modules/ festival. conf ... dispatcher/ modules/ flite.conf ... dispatcher/ modules/ llia_phon- generic. conf ... dispatcher/ modules/ mary-generic. conf ... dispatcher/ modules/ swift-generic. conf ... dispatcher/ speechd. conf ... dispatcher/ modules/ espeak- generic. conf ... dispatcher/ modules/ pico-generic. conf ... dispatcher/ modules/ ivona.conf ... dispatcher/ modules/ baratinoo. conf ... dispatcher/ modules/ ibmtts. conf ... dispatcher/ modules/ kali.conf ... heimdal: amd64 (7.7.0+ dfsg-3ubuntu1) ... amd64)root@ impulse: ~# grep proposed /etc/apt/ sources. list 192.168. 10.7/ubuntu/ jammy-proposed main restricted universe multiverse 192.168. 10.7/ubuntu/ jammy-proposed main restricted universe multiverse
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Installing new version of config file /etc/speech-
Removing obsolete conffile /etc/speech-
Removing obsolete conffile /etc/speech-
Removing obsolete conffile /etc/speech-
Removing obsolete conffile /etc/speech-
Removing obsolete conffile /etc/speech-
Removing obsolete conffile /etc/speech-
Setting up libgssapi3-
Setting up g++-9 (9.4.0-5ubuntu1) ...
Setting up g++ (4:11.2.0-1ubuntu1) ...
Setting up gnupg (2.2.27-3ubuntu2.1) ...
Setting up build-essential (12.9ubuntu3) ...
Processing triggers for libc-bin (2.35-0ubuntu3.1) ...
(focal-
deb http://
deb-src http://