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[Hans Korstens <bertusrex@xxxxxxxxxxx>]

Public bug reported:

When my laptop resumes from suspend, I often end up in an unresponsive lock screen. I can only move the mousepointer, but clicking or typing (password) does nothing, so I can't log in. When this happens, the lock screen is displayed in various states of completeness:
- Often I see a complete lock screen (with password input field etc), 
- Sometimes it's just the background without password input box with only the mouse cursor on it.  
- sometimes the screen is completely black, with only the mouse cursor on it.  

Tried possible solutions/workarounds:
- I can switch to a different VT, but when switching back to the lockscreen, it remains unresponsive
- suspending and resuming once: again: it remains unresponsive
- Very rarely seemingly random actions like starting a second X server (startx) or killing a unity* proces (like unity-panel-service) can make the lockscreen snap out of it, and start responding to events (key presses) again.

This bug is critical as the only real way to recover is to restart
lightdm or reboot, which destroyes the session plus all applications
running, including any open documents.

There's a very similar bugreport (for Ubuntu 14.04): 
  https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1418295 
but there's no progress there. 


I'm willing to provide additional logs/info

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: lightdm 1.14.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8
Uname: Linux 3.19.0-21-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
Date: Wed Jun 17 08:59:26 2015
InstallationDate: Installed on 2014-10-01 (259 days ago)
InstallationMedia: It
SourcePackage: lightdm
UpgradeStatus: Upgraded to vivid on 2015-04-23 (54 days ago)

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


** Tags: amd64 apport-bug vivid

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https://bugs.launchpad.net/bugs/1465974

Title:
  LightDM lock screen unresponsive after resume from suspend (Lenovo
  Yoga 2 Pro)

Status in lightdm package in Ubuntu:
  New

Bug description:
  When my laptop resumes from suspend, I often end up in an unresponsive lock screen. I can only move the mousepointer, but clicking or typing (password) does nothing, so I can't log in. When this happens, the lock screen is displayed in various states of completeness:
  - Often I see a complete lock screen (with password input field etc), 
  - Sometimes it's just the background without password input box with only the mouse cursor on it.  
  - sometimes the screen is completely black, with only the mouse cursor on it.  

  Tried possible solutions/workarounds:
  - I can switch to a different VT, but when switching back to the lockscreen, it remains unresponsive
  - suspending and resuming once: again: it remains unresponsive
  - Very rarely seemingly random actions like starting a second X server (startx) or killing a unity* proces (like unity-panel-service) can make the lockscreen snap out of it, and start responding to events (key presses) again.

  This bug is critical as the only real way to recover is to restart
  lightdm or reboot, which destroyes the session plus all applications
  running, including any open documents.

  There's a very similar bugreport (for Ubuntu 14.04): 
    https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1418295 
  but there's no progress there. 

  
  I'm willing to provide additional logs/info

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: lightdm 1.14.0-0ubuntu2
  ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8
  Uname: Linux 3.19.0-21-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  Date: Wed Jun 17 08:59:26 2015
  InstallationDate: Installed on 2014-10-01 (259 days ago)
  InstallationMedia: It
  SourcePackage: lightdm
  UpgradeStatus: Upgraded to vivid on 2015-04-23 (54 days ago)

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