Thanks to ali1234 this was tracked down to font-config rebuilding the cache at the start of the live session. Something changed in the way fontconfig validates the caches and so they are being rebuilt at the start of the live session.
This bug is likely related: https://bugs.freedesktop.org/show_bug.cgi?id=103652 ** Also affects: fontconfig (Ubuntu) Importance: Undecided Status: New ** Also affects: fontconfig (Ubuntu Bionic) Importance: Undecided Status: New ** Also affects: casper (Ubuntu Bionic) Importance: Undecided Assignee: Canonical Desktop Team (canonical-desktop-team) Status: New ** No longer affects: casper (Ubuntu) ** No longer affects: casper (Ubuntu Bionic) ** Changed in: fontconfig (Ubuntu Bionic) Assignee: (unassigned) => Canonical Desktop Team (canonical-desktop-team) ** Bug watch added: freedesktop.org Bugzilla #103652 https://bugs.freedesktop.org/show_bug.cgi?id=103652 ** Changed in: fontconfig (Ubuntu Bionic) Assignee: Canonical Desktop Team (canonical-desktop-team) => Iain Lane (laney) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1749546 Title: Booting a live session is slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1749546/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
