Thanks, it seems fprintd itself is the process having the issue though Could you install the debug package for it by following the steps on https://wiki.ubuntu.com/Debug%20Symbol%20Packages or just getting https://launchpad.net/ubuntu/+source/fprintd/1.90.1-1ubuntu1/+build/19168508/+files /fprintd-dbgsym_1.90.1-1ubuntu1_amd64.ddeb
Then use valgrind $ sudo valgrind /usr/libexec/fprintd then do the enroll/trigger the bug, and attached the log there -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1878172 Title: FUJITSU LIFEBOOK U748: 138a:0050 Validity Sensors not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libfprint/+bug/1878172/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs