Everything is normal working before the upgrade. After upgraded, those issues are the following: 1, When file manager is opened, the mouse is always busy. 2, The whole task bar aera is no more working. it neither be clicked, nor working.(I tried alt ctr d and desktop did now show, but the terminal still shows via hotkeys). And the menu is just kind of disapper--it is an ellipsis instead.(of course cannot be click nor hotkeyed too).
OK, except of those, all seems normal;since the menu is inavalible, I cannot use the apps, I have to write in my smart phone browser.However, I can open and veiw the files via file manager.