几周以来，我一直在尝试将Ubuntu 19.10升级到20.4。几次，我都收到提示询问我是否要升级。我说是的，没有任何反应。
I'm now starting to look into this. I have checked syslog, but didn't see anything in it that looked like the problem. Other logs either.
I've tried running update-manager -c, but it just presents the prompt again and then nothing...
咨询，好吗？
