Only one package needs to be downgraded for apt-cdrom to work again: libapt-pkg5.0 to version: libapt-pkg5.0_1.6~alpha5
http://changelogs.ubuntu.com/changelogs/pool/main/a/apt/apt_1.6~alpha7ubuntu1/changelog
Links used for testing: http://launchpadlibrarian.net/353920547/libapt-pkg5.0_1.6~alpha7_amd64.deb http://launchpadlibrarian.net/353116448/libapt-pkg5.0_1.6~alpha6_amd64.deb http://launchpadlibrarian.net/345537288/libapt-pkg5.0_1.6~alpha5_amd64.deb
For each ... I manually "dpkg -i" and then ran "apt-cdrom add".
Results: libapt-pkg5.0_1.6~alpha7ubuntu1 = fails <-- stock Bionic 20180216 libapt-pkg5.0_1.6~alpha7ubuntu = fails libapt-pkg5.0_1.6~alpha6 = fails libapt-pkg5.0_1.6~alpha5 = works <-- Bionic 20180131
Only one package needs to be downgraded for apt-cdrom to work again: libapt-pkg5.0 to version: libapt- pkg5.0_ 1.6~alpha5
http:// changelogs. ubuntu. com/changelogs/ pool/main/ a/apt/apt_ 1.6~alpha7ubunt u1/changelog
Links used for testing: launchpadlibrar ian.net/ 353920547/ libapt- pkg5.0_ 1.6~alpha7_ amd64.deb launchpadlibrar ian.net/ 353116448/ libapt- pkg5.0_ 1.6~alpha6_ amd64.deb launchpadlibrar ian.net/ 345537288/ libapt- pkg5.0_ 1.6~alpha5_ amd64.deb
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For each ... I manually "dpkg -i" and then ran "apt-cdrom add".
Results: pkg5.0_ 1.6~alpha7ubunt u1 = fails <-- stock Bionic 20180216 pkg5.0_ 1.6~alpha7ubunt u = fails pkg5.0_ 1.6~alpha6 = fails pkg5.0_ 1.6~alpha5 = works <-- Bionic 20180131
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