@mzimmers said in Fresh install; can't start Creator:
did I miss a step during installation? I don't remember having to do this in prior Qt/Creator installations.
You remembered correctly.
Newer versions of pre-built Qt depend on more external xcb-related libraries compared to older versions. There were good reasons for the change, but it also came with significant downsides. Namely, not all Linux distros have these libraries installed by default -- which means we now have to install more stuff before we can use apps based on Qt 5.15 (including Qt Creator).
See the following if you're interested in the gory details:
https://codereview.qt-project.org/c/qt/qtbase/+/253905
https://bugreports.qt.io/browse/QTBUG-84749?focusedCommentId=519832#comment-519832
I'm happy enough to work through these one by one (assuming, of course, there aren't hundreds of them)
If something like this happens again in the future, you can identify all the missing libraries in one go by calling ldd on libqxcb.so. That should hopefully be faster than trying to launch Qt Creator repeatedly.