kubuntu live session standby lock prevents login

[Xen]

When in the Kubuntu Vivid 15.04 beta 2 live session, the system logged me out or locked the screen due to inactivity.

I could not unlock the screen / log back in, and the password did not work or seemed not to work. In any case, the unlock button did not do anything.

(Obviously there is no root password?) (Or even the default user does not have a password).

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1443300

[Brian Murray (brian-murray)]

casper (1.357) vivid; urgency=medium

  * Adjust screenlocker disabling for Kubuntu with Plasma 5.3 the locking
    config changed while causing unwanted side effects with our existing 5.2
    setting of lowering the timeout to 0 (gets auto-corrected to 1). So, set
    the timeout to 0 and the new autolock=false to force both Plasma 5.2 and
    5.3 to behave correctly and disable locking.

 -- Harald Sitter <email address hidden> Fri, 27 Mar 2015 11:49:53 +0100