This morning I updated my system. There were a lot of Mesa updates. As the result my SDDM display manager started with a black screen. Also KDE Plasma did not work. In /var/log/Xorg.0.log I found this: [ 962.076] (EE) AIGLX: reverting to software rendering [ 962.093] (EE) AIGLX error: dlopen of /usr/lib64/dri/swrast_dri.so failed (/usr/lib64/dri/swrast_dri.so: undefined symbol: _glapi_tls_Dispatch) [ 962.093] (EE) GLX: could not load software renderer It took my hours to find the reason. At first I tried to revert the relevant packages (Mesa, Xorg, ...) to Leap 42.2 without updates. This did not help. Because of the Nvidia-libglvnd discussion I took a look at package libglvnd0. It comes from these repositories: https://software.opensuse.org/package/libglvnd0 Finally the deinstallation of package libglvnd0 helped to get OpenGL, SDDM/KDE Plasma etc. working again. libglvnd0 itself was not updated recently. But it's probably uncompatible with the latest Mesa updates. See https://bugzilla.opensuse.org/show_bug.cgi?id=992029#c3 I only found one other report about this problem: https://forums.opensuse.org/showthread.php/523998-Problems-with-Mesa Greetings, Björn -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org