軟體更新程式觸發空白，未更新至 20.04 LTS

Question

我多次獲得更新到 Ubuntu 20.04 LTS 的選項軟體更新程式。當我單擊“升級...”使其繼續時，唯一發生的事情是軟體更新程式關閉。

我已經嘗試過，從終端：

sudo apt-get update
sudo apt-get dist-upgrade

結果，只不過是另一個與 JavaFX 無關的令人費解的問題。

phil@UbuntuDesktop:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libopenjfx-java libopenjfx-jni openjfx
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
phil@UbuntuDestktop:~$

關於如何繼續，或者什麼可能會導致問題的任何想法？