(In reply to Christoph Haag from comment #18) > To be fair, the segfaults are fixed, but sddm and plasmashell randomly not > working/rendering until the shader cache(s) are deleted is still happening. > Unfortunately that's a bit harder to debug, but there might still be a > similar issue hiding somewhere. This may be rather bug 105065, which is really a QT bug: https://bugreports.qt.io/browse/QTBUG-66420