Comment 3 for bug 1626931

I installed 5.5 version and then removed it and installed 5.6 version and found it working

Output of "sudo aa-status"

apparmor module is loaded.
21 profiles are loaded.
21 profiles are in enforce mode.
   /sbin/dhclient
   /usr/bin/evince
   /usr/bin/evince-previewer
   /usr/bin/evince-previewer//sanitized_helper
   /usr/bin/evince-thumbnailer
   /usr/bin/evince-thumbnailer//sanitized_helper
   /usr/bin/evince//sanitized_helper
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/connman/scripts/dhclient-script
   /usr/lib/cups/backend/cups-pdf
   /usr/lib/lightdm/lightdm-guest-session
   /usr/lib/lightdm/lightdm-guest-session//chromium
   /usr/lib/telepathy/mission-control-5
   /usr/lib/telepathy/telepathy-*
   /usr/lib/telepathy/telepathy-*//pxgsettings
   /usr/lib/telepathy/telepathy-*//sanitized_helper
   /usr/lib/telepathy/telepathy-ofono
   /usr/sbin/cups-browsed
   /usr/sbin/cupsd
   /usr/sbin/mysqld
   /usr/sbin/tcpdump
0 profiles are in complain mode.
6 processes have profiles defined.
6 processes are in enforce mode.
   /usr/bin/evince (26287)
   /usr/bin/evince (26688)
   /usr/lib/telepathy/mission-control-5 (2809)
   /usr/sbin/cups-browsed (1038)
   /usr/sbin/cupsd (2786)
   /usr/sbin/mysqld (1082)
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.