It appears this message keeps happening with the gnome-shell crash: "Impossible to lock surface front buffer: Function not implemented"
that's from mutter's "native" (Wayland) backend: next_bo = gbm_surface_lock_front_buffer (gbm_surface); if (!next_bo) { g_error ("Impossible to lock surface front buffer: %m"); return FALSE; } so it means your kernel graphics driver (mgag200) does not fully support Wayland sessions. Please just use Xorg sessions instead (log into "Ubuntu" instead of "Ubuntu on Wayland"). ** Summary changed: - gnome-shell trap int3 no desktop + gnome-shell trap int3 no desktop (MGA G200eW fails when calling gbm_surface_lock_front_buffer) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1826025 Title: gnome-shell trap int3 no desktop ("Impossible to lock surface front buffer: Function not implemented" on Matrox graphics card) To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1826025/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs