Using Kubuntu 15.10, KDE Frameworks 5.18.0, SVG theme icons produce a warnings flood: qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4532 qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4538 qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4548 qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4554 qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4566 qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4572 qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4582 qt.svg: /usr/share/icons/breeze/actions/24/document-new.svg:123: Could not resolve property: linearGradient4588 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4532 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4538 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4548 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4554 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4566 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4572 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4582 qt.svg: /usr/share/icons/breeze/actions/24/document-open.svg:123: Could not resolve property: linearGradient4588 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4532 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4538 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4548 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4554 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4566 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4572 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4582 qt.svg: /usr/share/icons/breeze/actions/24/document-save.svg:127: Could not resolve property: linearGradient4588 For reference and fixes to Qt SVG, see https://bugreports.qt.io/browse/QTBUG-52079
To reproduce, launch for example Qt Designer in a terminal.
I cannot reproduce this with latest frameworks release.
this bug is fixed long time ago please update KDE Framework or use breeze-icons from master. Thanks for submitt this bug