問題：
GNU Screen seems to freeze. GNU Screen 似乎凍結了。 Unable to enter user input.無法輸入用戶輸入。
I was using GNU screen and when I pressed the screen it became unresponsive.我正在使用 GNU 屏幕，當我按下屏幕時，它變得沒有響應。 I can execute all the GNU screen commands, but can't enter user input.我可以執行所有 GNU 屏幕命令，但無法輸入用戶輸入。 I don't want to kill this screen as I have important work and I don't want to lose it.我不想殺死這個屏幕，因爲我有重要的工作，我不想失去它。