I have forgot to say that I cannot switch the language between Thai and English with Alt+Shift shortcut keys on the lock screen after upgrading my Ubuntu OS from 14.04 LTS to 16.04 LTS, but it is also appeared the crash screen as shown in YouTube.
I have forgot to say that I cannot switch the language between Thai and English with Alt+Shift shortcut keys on the lock screen after upgrading my Ubuntu OS from 14.04 LTS to 16.04 LTS, but it is also appeared the crash screen as shown in YouTube.