That's why I am asking - starting evolution causes it.
[greg@carbon ~]$ sudo dmesg -C
Place your right index finger on the fingerprint reader
[greg@carbon ~]$ dmesg
[greg@carbon ~]$ killall evolution
[greg@carbon ~]$ dmesg
[greg@carbon ~]$ evolution
(evolution-alarm-notify:23093): GLib-GIO-WARNING **: 15:31:30.140: Your application did not unregister from D-Bus before destruction. Consider using g_application_run().
^Z
[1]+ Stopped evolution
[greg@carbon ~]$ bg
[1]+ evolution &
[greg@carbon ~]$ dmesg
[18175.339883] xfs filesystem being remounted at /newroot/home/greg/.local/share/webkitgtk/databases supports timestamps until 2038 (0x7fffffff)
[18175.340498] xfs filesystem being remounted at /newroot/home/greg/.cache/fontconfig supports timestamps until 2038 (0x7fffffff)
[18175.340772] xfs filesystem being remounted at /newroot/home/greg/.cache/gstreamer-1.0 supports timestamps until 2038 (0x7fffffff)
-Greg