Kubuntu 15.10 & ecryptfs & change password

[Igor Mironchik]

Hi folks,

I found, probably, strange bug... I had Kubuntu 15.10 with ecryptfs on 
my $HOME directory. Once I decided to change password for my user. I 
went to the System Settings and there changed password, rebooted... And 
I couldn't login to my Kubuntu. I saw login screen, entered new 
password, pressed Enter... Screen flashed and went back to login screen. 
And this happened until I returned my password to the old one from the 
command line...

Is it a known bug?

Thank you.
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