Thanks. It looks like the primary graphics card (not a GPU) is using mgag200, but also simpledrm is still active because the Matrox driver failed to remove it.
Then it looks like the desktop (or login screen even) might have failed to render for Mesa/Zink reasons: Sep 09 10:29:01 bohm org.gnome.Shell.desktop[2815]: MESA: error: ZINK: failed to choose pdev Sep 09 10:29:01 bohm org.gnome.Shell.desktop[2815]: libEGL warning: egl: failed to create dri2 screen ... Sep 09 10:29:01 bohm org.gnome.Shell.desktop[2815]: MESA: error: ZINK: failed to choose pdev Sep 09 10:29:01 bohm org.gnome.Shell.desktop[2815]: glx: failed to create drisw screen Please try setting (uncommenting) WaylandEnable=false in /etc/gdm3/custom.conf and then reboot. ** Summary changed: - gdm3 fails after release upgrade, have to use lightdm + [mgag200] gdm3 fails after release upgrade, have to use lightdm ** Tags added: mgag200 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/2079843 Title: [mgag200] gdm3 fails after release upgrade, have to use lightdm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2079843/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
