After updating to 20210105 I'm able to log in to Cinnamon. Then it runs fine
for about 10-20 seconds, after which it crashes (popup: "Cinnamon crashed") and
falls successfully back into fallback-mode.
The logs are pretty much empty, sadly. All I got from journalctl is:
```
Jan 07 09:45:47 suse-laptop cinnamon[4294]: JS LOG: [LookingGlass/info] Hiding
systray: network
Jan 07 09:45:48 suse-laptop /usr/libexec/gdm/gdm-x-session[4127]:
cinnamon-session[4127]: WARNING: t+6.40203s: Detected that screensaver has
appeared on the bus
Jan 07 09:45:48 suse-laptop cinnamon-session[4127]: WARNING: t+6.40203s:
Detected that screensaver has appeared on the bus
Jan 07 09:45:52 suse-laptop /usr/libexec/gdm/gdm-x-session[4294]: **
Jan 07 09:45:52 suse-laptop /usr/libexec/gdm/gdm-x-session[4294]:
Cjs:ERROR:../gi/function.cpp:1063:void uninit_cached_function_data(Function*):
assertion failed: (function->info && "Don't know how to free cache without GI
info")
Jan 07 09:45:52 suse-laptop /usr/libexec/gdm/gdm-x-session[4294]: Bail out!
Cjs:ERROR:../gi/function.cpp:1063:void uninit_cached_function_data(Function*):
assertion failed: (function->info && "Don't know how to free cache without GI
info")
Jan 07 09:45:53 suse-laptop nm-applet[4511]: gdk_window_thaw_toplevel_updates:
assertion 'window->update_and_descendants_freeze_count > 0' failed
```