I have filed the following bug report for Qt: https://bugreports.qt.io/browse/QTBUG-68027 It seems that Qt - Plasma integration is not working for openUrl(). I am not sure whether plasma-integration is the correct project for such an error. Please correct the Product if necessary, and close this issue if it needs to be fix in Qt.
Works for me. Do you have a browser configured at all?
(In reply to Martin Flöser from comment #1) > Works for me. Do you have a browser configured at all? I had only Falkon installed and it was the selected browser. The links in KDE documentation in KHelpCenter was working, so I assumed Falkon was OK. I have also installed Firefox. Now openUrl() works. Regardless of which browser is selected, Firefox is always opened. So it is not a Qt bug after all. It seems another bug report is needed for Falkon not being recognized as a valid web browser although Default Applications > Web Browser "knows" about Falkon.
Moving to falkon, maybe the falkon devs have an idea.
>I have filed the following bug report for Qt: I'm using a GTK system and your test application works here. It just triggers gvfs-open, so i think you just have some system misconfiguration (IMO).
(In reply to Moonchild from comment #4) > >I have filed the following bug report for Qt: > I'm using a GTK system and your test application works here. It just > triggers gvfs-open, so i think you just have some system misconfiguration > (IMO). It turned out Falkon was not recognized/reported as a web browser. Please see Comment #2 by me.
Can you test with "xdg-open", that's what QDesktopServices::openUrl() should be calling.
(In reply to David Rosca from comment #6) > Can you test with "xdg-open", that's what QDesktopServices::openUrl() should > be calling. xdg-open was not available on my system. After installing the xdg-utils package openUrl() successfully opened Falkon. So it was neither Qt, nor KDE Plasma/Falkon issue. I've checked the relevant function in Qt (http://code.qt.io/cgit/qt/qtbase.git/tree/src/platformsupport/services/genericunix/qgenericunixservices.cpp?h=5.9.5#n106) If xdg-open is not available, Qt checks for kmfclient on KDE. If that check fails, it checks for well-known browsers. That last check explains why Firefox was opened although Falkon was the default browser. Maybe Falkon should be added upstream into the "if (desktop == QByteArray("KDE"))" section.
xdg-open is standard desktop utility, it should be installed by default with all desktop environments. If not, you should probably report bug to your distribution.