Here is the error returned by thumbnailer in the unity8-dash.log when processing image://thumbnailer/file:/// uris:
[2016-11-08:16:59:24.600] Thumbnailer: RequestImpl::dbusCallFinished(): D-Bus error: Handler::checkFinished(): no artwork for thumbnail: /snap/unity8-session/x4/usr/lib/x86_64-linux-gnu/unity-scopes/fake_music_scope/albumart3.png (67,0): NO ARTWORK [2016-11-08:16:59:24.601] Thumbnailer: RequestImpl::dbusCallFinished(): D-Bus error: Handler::checkFinished(): no artwork for thumbnail: /snap/unity8-session/x4/usr/lib/x86_64-linux-gnu/unity-scopes/fake_music_scope/art2.jpg (184,0): NO ARTWORK [2016-11-08:16:59:24.604] Thumbnailer: RequestImpl::dbusCallFinished(): D-Bus error: Handler::checkFinished(): no artwork for thumbnail: /snap/unity8-session/x4/usr/lib/x86_64-linux-gnu/unity-scopes/fake_music_scope/albumart2.png (67,0): NO ARTWORK [2016-11-08:16:59:24.622] <Unknown File>:46:33: QML CroppedImageMinimumSourceSize: Thumbnailer: RequestImpl::dbusCallFinished(): D-Bus error: Handler::checkFinished(): no artwork for thumbnail: /snap/unity8-session/x4/usr/lib/x86_64-linux-gnu/unity-scopes/fake_music_scope/albumart3.png (67,0): NO ARTWORK [2016-11-08:16:59:24.622] <Unknown File>:46:33: QML CroppedImageMinimumSourceSize: Thumbnailer: RequestImpl::dbusCallFinished(): D-Bus error: Handler::checkFinished(): no artwork for thumbnail: /snap/unity8-session/x4/usr/lib/x86_64-linux-gnu/unity-scopes/fake_music_scope/art2.jpg (184,0): NO ARTWORK [2016-11-08:16:59:24.622] <Unknown File>:46:33: QML CroppedImageMinimumSourceSize: Thumbnailer: RequestImpl::dbusCallFinished(): D-Bus error: Handler::checkFinished(): no artwork for thumbnail: /snap/unity8-session/x4/usr/lib/x86_64-linux-gnu/unity-scopes/fake_music_scope/albumart2.png (67,0): NO ARTWORK -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity-scopes-shell in Ubuntu. https://bugs.launchpad.net/bugs/1639249 Title: Result art not displayed when run in a snap Status in unity-scopes-api package in Ubuntu: Invalid Status in unity-scopes-shell package in Ubuntu: New Bug description: When a scope calls result.set_art() the path is not adjusted to take in consideration $SNAP. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-scopes-api/+bug/1639249/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp