[Bug 1566542] Re: [upstream] Two sddm bugs with 16.04 – MIT-Magic cookie unpredictable for VNC / option "hideshell" buggy

[Flames_in_Paradise]

** Description changed:

  SDDM with 16.04 LTS introduces two new problems that did not exist with
  15.10 or 14.04:
  
  1. The option HideShells in /etc/sddm.conf does not work correctly. When
  more than one shell is specified, the filter does not work and the
  matching users are listed in the greeting screen notwithstanding.
  
  2. The xauthority (or MIT-MAGIC-COOKIE) file is no longer at
  /var/run/sddm/:0 but at an unpredictable location like
  /var/run/sddm/{ca7d6d45-9b4d-4a92-997e-c9c11081dea1} which is build by
  including a random UUID in the path. When trying to start x11vnc, for
  example, that file cannot be found. With 15.10, one could start x11vnc
  with '/usr/bin/x11vnc -auth /var/run/sddm/:0 -display :0 -rfbauth
  /etc/vncpasswd -rfbport 5943 -reopen -forever', this is no longer
  possible.
  
  Especially the second bug is uncool with Ubuntu server for remote root
  servers.
  
+ Versions installed at time of bug-report:
+ sddm 0.13.0-1ubuntu5: amd64 i386
+ x11-vnc 0.9.13-1.2build1: amd64 i386
+ 
  Upstream bug-reports:
- [1] https://github.com/sddm/sddm/issues/621 
+ [1] https://github.com/sddm/sddm/issues/621
  (HideShells not working when multiple shells are specified)_
  [2] https://github.com/sddm/sddm/issues/622
  (MIT-MAGIC-COOKIE file location is unpredictable)

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Title:
  [upstream] Two sddm bugs with 16.04 – MIT-Magic cookie unpredictable
  for VNC / option "hideshell" buggy

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