Before I couldn't login, it was showing:
failed to start session
After I reinstalled
ubuntu-desktop, my keyboard settings is broken. Auto-switch layout keyboard don't work.
When I change the window, language switchs to default (i. e. eng). Now this 'feature' does not work and it is really necessary to me.
Keyboard setting: Allow different sources for each window -> Now window use the default source (I can't upload images).