联想 ThinkBook 15 G3 ACL 笔记本电脑，配备 AMD® Ryzen 5 5500u 16GB RAM 4GB 交换。工作期间突然冻结。鼠标光标移动，但屏幕上的图片没有变化。Atl+Tab 组合不起作用，键盘不起作用。在它挂起之前，日志中最后引起我注意的是：
May 18 15:56:30 maxim-lap gnome-shell[2757]: The offending signal was app-state-changed on ShellAppSystem 0x559fc4033fa0.
May 18 15:56:30 maxim-lap gnome-shell[2757]: Attempting to call back into JSAPI during the sweeping phase of GC. This is most likely caused by not destroying a Clutter actor or Gtk+ widget with ::destroy signals connected, but can also be caused by using the destroy(), dispose(), or remove() vfuncs. Because it would crash the application, it has been blocked and the JS callback not invoked.
这两条信息重复多次。