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[Alberto Salvia Novella <es20490446e@xxxxxxxxx>]

** Changed in: lightdm (Ubuntu)
   Importance: Undecided => Critical

** Package changed: lightdm (Ubuntu) => primus (Ubuntu)

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https://bugs.launchpad.net/bugs/1448558

Title:
  lightdm crashes with systemd

Status in primus package in Ubuntu:
  Incomplete

Bug description:
  system:
  hardware: BTO laptop
  CPU: Intel Core i7-3630qm @ 2,4 GHz x 8
  RAM: 7,7 GiB
  GPU 1: intel ivybridge Mobile 
  GPU 2: discrete NVIDIA card, optirun and nouveau installed.
  OS: Ubuntu 15.04 64-bit

  
  what i expected to happen:

  After upgrade to 15.04, I restarted as per request. i expected the
  login screen to appear, and after entering my password, the Unity
  Desktop to load as it always did in 14.04 and 14.10.

  What actually happens:

  - plymouth (i have a custom theme with a loading bar) zips by real fast!
  - in between Plymouth and Lightdm, a message appears, but time is too short for me to read. 
  - then Lightdm appears to load, but freezes up at varying points. 
  -the mouse pointer appears, but disappears. 
  -all input is lost! keyboard and mouse not responding
  -any notifications about networking or other on screen at the moment of freeze are frozen along with it.
  -lightdm screen elements load or don't at varying rates, sometimes a wallpaper, sometimes not. same with password box, dotted pattern, logo etc.
  - no VT's available
  - judging by HD activity LED, linux is still running somewhere in there.

  i have to reboot using REISUB

  this started happening after the upgrade.
  I suspect is has to do with either: 
  - systemd, 
  - the latest linux kernel, 
  - GPU switching (laptop boots with NVIDIA card on, switches to Intel when lightdm loads)

  Current workaround:
  installed sddm (KDE's display manager i believe) and let it handle login instead of lightdm. it has no issues.

  i tried starting from grub in Upstart mode, and with older kernels,
  and resuls vary. i was able to log in using lightdm succesfully more
  often at least.

  i submitted this bug using "ubuntu-bug lightdm"

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: lightdm 1.14.0-0ubuntu2
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Apr 25 23:53:02 2015
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=nl_NL.UTF-8
   SHELL=/bin/bash
  SourcePackage: lightdm
  UpgradeStatus: No upgrade log present (probably fresh install)

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