Cant type password or change user after block computer with super+L

[monomakh]

After press super+L (only once for 2 days of using ubuntu 14.04) I cant to type password to log in back to my session.
I cant press change layout, volume,calendar and power off (for change user) buttons.
I can only press with mouse on top panel - then "Пароль" (password) text is shown in password field and press on this field to type password, but cant to type it - no reactions on any keyboard keys.

[Sebastien Bacher (seb128)]

Thank you for your bug report. Do you use unity? Is that the new session lock screen? Did you have a password prompt opened behind the lock screen (could be bug #1305586)? Does it happen every time or only once?

Note that as a workaround you can use the top left menu -> switch user then log back from the greeter

[monomakh (monomakh)]

Yes, I am use Unity. I have autologon on boot (for ) and during work several times per day I lock my computer or it's locked after idle time. This issue happens several times per day, so now I just turn off autolock on idle and dont lock my computer manually.
I'm often use 2xclient and remmina for work with remote computers via rdp and vnc, so may be it's like a bug 1305586.
On top left I see only name of my computer (see attachment). Buttons on top right dont clickable. I have not possible to choose guest session.

[monomakh (monomakh)]

My installation is not clean, it's upgrade from 13.10.

[monomakh (monomakh)]

Today I get this issue on my home computer. It's have not autologon and was locked after idle time. It's not a clean install too, upgraded from 13.10.

[Marco Trevisan (Treviño) (3v1n0)]

See also bug #1311403