Ubuntu Vm accept password but returns and always show password screen. I can't reach desktop

[ccengz]

[RDPetruska]

Silly but basic question - are you making sure you are clicking the mouse into the Workstation window so that the guest has focus, and then clicking in the 'enter password' window, so that your keystrokes are going to the login window?  Note that password fields *may* not show characters being typed.

[ccengz]

I solved my problem like this.

First of all my problem is ,

It accept password, I can write my password then click login, then screen refreshing and it seems getting desktop, however 3 seconds later password screen comes again.

My available virtual disk capacity is less than 300Mb. And I think this leads the problem.

I edit vm settings, clean disk, check disk etc.

Then start it in safety mode than it runs...