Syslog has a few obvious failures for snapd related to the fact that the snaps did not mount correctly.
zyga@zyga-thinkpad-w510:~$ journalctl -u snapd -- Logs begin at wto 2016-04-19 14:52:46 CEST, end at wto 2016-04-19 15:09:43 CEST. -- kwi 19 14:55:39 zyga-thinkpad-w510 systemd[1]: Started Snappy daemon. kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: snapstate.go:374: cannot retrieve info for snap "hello-world": cannot find mounted snap "hello-world" at revisi kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.026609 snapstate.go:374: cannot retrieve info for snap "hello-world": cannot find mounted snap "hello-worl kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.026701 snapstate.go:374: cannot retrieve info for snap "links": cannot find mounted snap "links" at revisi kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: snapstate.go:374: cannot retrieve info for snap "links": cannot find mounted snap "links" at revision 1 kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: ifacemgr.go:134: cannot connect plug "unity7" from snap "hello-unity", no such plug kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.087397 ifacemgr.go:134: cannot connect plug "unity7" from snap "hello-unity", no such plug kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.087447 ifacemgr.go:134: cannot connect plug "network" from snap "links", no such plug kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.087488 ifacemgr.go:134: cannot connect plug "network-bind" from snap "links", no such plug kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: ifacemgr.go:134: cannot connect plug "network" from snap "links", no such plug kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: ifacemgr.go:134: cannot connect plug "network-bind" from snap "links", no such plug kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding / kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/system-info kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/login kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/logout kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/icons/{name}/icon kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/snaps kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/snaps/{name} kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/interfaces kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/assertions kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/assertions/{assertType} kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/events kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/changes/{id} kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:202: DEBUG: adding /v2/changes kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:192: DEBUG: init done in 1.048854ms kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?sources=local 146.449673ms 200 kwi 19 14:58:04 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?q=polari 729.704955ms 200 kwi 19 14:58:30 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?q=firefox 649.339281ms 200 kwi 19 14:58:30 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?q=firefo 972.39257ms 200 kwi 19 15:03:31 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?sources=local 556.543µs 200 kwi 19 15:07:42 zyga-thinkpad-w510 /usr/lib/snapd/snapd[3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/interfaces 360.746µs 200
Syslog has a few obvious failures for snapd related to the fact that the snaps did not mount correctly.
zyga@zyga- thinkpad- w510:~$ journalctl -u snapd snapd/snapd[ 3780]: snapstate.go:374: cannot retrieve info for snap "hello-world": cannot find mounted snap "hello-world" at revisi snapd/snapd[ 3780]: snapstate.go:374: cannot retrieve info for snap "links": cannot find mounted snap "links" at revision 1 snapd/snapd[ 3780]: ifacemgr.go:134: cannot connect plug "unity7" from snap "hello-unity", no such plug snapd/snapd[ 3780]: ifacemgr.go:134: cannot connect plug "network" from snap "links", no such plug snapd/snapd[ 3780]: ifacemgr.go:134: cannot connect plug "network-bind" from snap "links", no such plug snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding / snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/system-info snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/login snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/logout snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/icons/ {name}/ icon snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/snaps snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/snaps/{name} snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/interfaces snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/assertions snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/assertions/ {assertType} snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/events snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/changes/{id} snapd/snapd[ 3780]: daemon.go:202: DEBUG: adding /v2/changes snapd/snapd[ 3780]: daemon.go:192: DEBUG: init done in 1.048854ms snapd/snapd[ 3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps? sources= local 146.449673ms 200 snapd/snapd[ 3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?q=polari 729.704955ms 200 snapd/snapd[ 3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?q=firefox 649.339281ms 200 snapd/snapd[ 3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps?q=firefo 972.39257ms 200 snapd/snapd[ 3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/snaps? sources= local 556.543µs 200 snapd/snapd[ 3780]: daemon.go:170: DEBUG: uid=1000;@ GET /v2/interfaces 360.746µs 200
-- Logs begin at wto 2016-04-19 14:52:46 CEST, end at wto 2016-04-19 15:09:43 CEST. --
kwi 19 14:55:39 zyga-thinkpad-w510 systemd[1]: Started Snappy daemon.
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.026609 snapstate.go:374: cannot retrieve info for snap "hello-world": cannot find mounted snap "hello-worl
kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.026701 snapstate.go:374: cannot retrieve info for snap "links": cannot find mounted snap "links" at revisi
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.087397 ifacemgr.go:134: cannot connect plug "unity7" from snap "hello-unity", no such plug
kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.087447 ifacemgr.go:134: cannot connect plug "network" from snap "links", no such plug
kwi 19 14:55:44 zyga-thinkpad-w510 snapd[3780]: 2016/04/19 14:55:44.087488 ifacemgr.go:134: cannot connect plug "network-bind" from snap "links", no such plug
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:55:44 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:58:04 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:58:30 zyga-thinkpad-w510 /usr/lib/
kwi 19 14:58:30 zyga-thinkpad-w510 /usr/lib/
kwi 19 15:03:31 zyga-thinkpad-w510 /usr/lib/
kwi 19 15:07:42 zyga-thinkpad-w510 /usr/lib/