libsm6 4.3.0.dfsg.1-6ubuntu25.3 (i386 binary) in ubuntu warty

X Window System Session Management library
 libSM provides an interface to XSMP, the X Session Management Protocol.
 XSMP is a protocol that facilitates the management of groups of client
 applications by a session manager. The session manager can cause clients to
 save their state, to shut down, and to be restarted into a previously saved
 state. This protocol is layered on top of the X Consortium's ICE protocol
 (see the libice6 package).