[Bug 1788797] [NEW] Regression: Live session login via sddm (emtpy password) fails

[Rik Mills]

Public bug reported:

Series: Cosmic
sddm: 0.18.0-1ubuntu2 
casper: 1.395

Since casper change: https://launchpad.net/ubuntu/+source/casper/1.395

"Set empty live user password on all flavours, this was previously gdm
specific."

sddm login to the live session is not possible. e.g. should the live
session user log out or restart X/sddm

In discussion @ https://github.com/sddm/sddm/issues/751 it appears that
sddm does not support login with an empty password.

Focus of that discussion is more towards autologin when clicking a user
with a black password, but it is also clear that clicking login with no
password in the password box for a passwordless user will also fail.

** Affects: casper (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: sddm (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: casper (Ubuntu Cosmic)
     Importance: Undecided
         Status: New

** Affects: sddm (Ubuntu Cosmic)
     Importance: Undecided
         Status: New

** Also affects: casper (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: casper (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: sddm (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1788797

Title:
  Regression: Live session login via sddm (emtpy password) fails

Status in casper package in Ubuntu:
  New
Status in sddm package in Ubuntu:
  New
Status in casper source package in Cosmic:
  New
Status in sddm source package in Cosmic:
  New

Bug description:
  Series: Cosmic
  sddm: 0.18.0-1ubuntu2 
  casper: 1.395

  Since casper change: https://launchpad.net/ubuntu/+source/casper/1.395

  "Set empty live user password on all flavours, this was previously gdm
  specific."

  sddm login to the live session is not possible. e.g. should the live
  session user log out or restart X/sddm

  In discussion @ https://github.com/sddm/sddm/issues/751 it appears
  that sddm does not support login with an empty password.

  Focus of that discussion is more towards autologin when clicking a
  user with a black password, but it is also clear that clicking login
  with no password in the password box for a passwordless user will also
  fail.

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