http://www.jmpcrash.com/?p=1142
Phenomenon: The Ubuntu docker column disappears and the login interface is too simplified for searching.
error:
GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._g_2dfile2_derror_2dquark.Code17:
Cannot open dconf database: invalid gvdb header
The possible reason is that the user files are messed up. Back up the dconf configuration and remove the configuration file:
mv ~/.config/dconf/ ~/.config/dconf.bak