hoffmannrobert added a comment.
In D10344#297751 <https://phabricator.kde.org/D10344#297751>, @hoffmannrobert wrote: > In Wayland there seems to be a problem with QScreen: creating a panel on the second screen crashes plasmashell in QScreen::size(), called by PanelView::panelConfig() (shell/panelview.cpp:130). While debugging a crash which occured when creating a panel on the second screen, I found that in certain screen/graphics hardware configurations (e.g. two screens connected to integrated Intel graphics controller, no screens connected to ext. Nvidia graphics controller) there are screen numbers like 3 or 4. This cannot work, because QGuiApplication::screens() is a QList and Panel:panelConfig() wants to do QScreen *s = QGuiApplication::screens().at(screenNum): In Panel::panelConfig(): int screenNum = qMax(screen(), 0); // screenNum is 4 here if (QGuiApplication::screens().size() < screenNum) { // 2 < 4 return KConfigGroup(); // returns empty KConfigGroup --> Crash in Panel::setHeight() } This happens in X11 and in Wayland. Still looking where these screen numbers come from... REPOSITORY R120 Plasma Workspace REVISION DETAIL https://phabricator.kde.org/D10344 To: hoffmannrobert, #plasma Cc: mart, ngraham, plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol
