Can't type password on login screen after upgrade ubuntu 16.04 LTS to ubuntu 17.04

I just upgraded my ubuntu 16.04 LTS to 17.04. I did it from Software & Updates feature on ubuntu setting. Then after it has completed, i restarted my laptop (Acer). Then, it displayed the login screen. When i typed the password, it didn't show anything. Not even my password, it just displayed the mouse pointer.

Ofcourse, i've been searching similar issues over the internet. Unfortunately, i didn't found any solution that is same with me.

Any one can help me, please

2 Answers

Finally, i know why this was happen to me. Unintentionally, I was removed the old desktop while upgrade to Ubuntu 17.04. Maybe, that's the main reason i thought.

This is how i fixed it :

1. Reboot my laptop
2. Hold on Shift key while computer boot into ubuntu
3. On grub window, choose ubuntu recovery mode
4. On recovery mode window, choose root
5. Install any desktop you want (in my case, i installed Gnome desktop)
6. After i installed the desktop, i rebooted my laptop
7. Finished

So this might be a long reach but I had this issue once too. Go to recovery mode, as root

and run apt-get install xserver-xorg-input-all (assuming you use Xorg)

That package was somehow uninstalled and I couldn't input anything. Hope it helps.

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