← Back to team overview

lightdm-gtk-greeter-team team mailing list archive

  1. lightdm-gtk-greeter-team team
  2. Mailing list archive
  3. Message #00823

[Bug 1448214] [NEW] lightdm-gtk-greeter uses 100% CPU and shows gray screen

  Thread Previous • Date Previous • • Thread Next 
Public bug reported:

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=15.04
DISTRIB_CODENAME=vivid
DISTRIB_DESCRIPTION="Ubuntu 15.04"

Package: lightdm-gtk-greeter 2.0.0-0ubuntu1

ubuntu-bug output is attached with deatiled system info.

After upgrading Xubuntu from 14.10 to 15.04 the log in screen remains
gray and the lightdm-gtk-greeter process consumes 100% CPU on one core.

I expected a login screen. When stopping/starting the service with
systemctl [re]start|stop lightdm.service

I recieved "Error: No space left on device." as an error. This was
misleading as I don't have a space issue.

I added "allow-debugging=true" to "/etc/lightdm/lightdm-gtk-
greeter.conf" then I restarted lightdm.

In the log I could then see that the greeter was switching between
active monitors endlessly.

...
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: Read 8 bytes from daemon
DEBUG-Message: Read 37 bytes from daemon
DEBUG-Message: Prompt user with 1 message(s)
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
DEBUG-Message: [Background] Active monitor changed to: DP1 #0
DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
...

So I set
"active-monitor=0" and restarted lightdm. This solved the issue.

I suspect this may only happen with multi monitor setups and on mirrors
displays that have a cursor on both. This is unclear to me though.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: lightdm-gtk-greeter 2.0.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Apr 24 12:09:07 2015
InstallationDate: Installed on 2014-08-06 (261 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
SourcePackage: lightdm-gtk-greeter
UpgradeStatus: Upgraded to vivid on 2015-04-24 (0 days ago)

** Affects: lightdm-gtk-greeter (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

** Attachment added: "bug.txt"
   https://bugs.launchpad.net/bugs/1448214/+attachment/4383131/+files/bug.txt

** Description changed:

  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=15.04
  DISTRIB_CODENAME=vivid
  DISTRIB_DESCRIPTION="Ubuntu 15.04"
  
  Package: lightdm-gtk-greeter 2.0.0-0ubuntu1
  
  ubuntu-bug output is attached with deatiled system info.
  
  After upgrading Xubuntu from 14.10 to 15.04 the log in screen remains
  gray and the lightdm-gtk-greeter process consumes 100% CPU on one core.
  
- I expected a login screen. When stopping/starting the service with 
- systemctl [re]start|stop lightdm.service 
+ I expected a login screen. When stopping/starting the service with
+ systemctl [re]start|stop lightdm.service
  
- I recieved 
- "Error: No space left on device.""
- 
- as an error. This was misleading as I don't a space issue.
+ I recieved "Error: No space left on device." as an error. This was
+ misleading as I don't have a space issue.
  
  I added "allow-debugging=true" to "/etc/lightdm/lightdm-gtk-
  greeter.conf" then I restarted lightdm.
  
  In the log I could then see that the greeter was switching between
  active monitors endlessly.
  
  ...
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: Read 8 bytes from daemon
  DEBUG-Message: Read 37 bytes from daemon
  DEBUG-Message: Prompt user with 1 message(s)
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  ...
  
- So I set 
+ So I set
  "active-monitor=0" and restarted lightdm. This solved the issue.
  
  I suspect this may only happen with multi monitor setups and on mirrors
  displays that have a cursor on both. This is unclear to me though.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: lightdm-gtk-greeter 2.0.0-0ubuntu1
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Fri Apr 24 12:09:07 2015
  InstallationDate: Installed on 2014-08-06 (261 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  SourcePackage: lightdm-gtk-greeter
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (0 days ago)

-- 
You received this bug notification because you are a member of LightDM
Gtk+ Greeter Development Team, which is subscribed to lightdm-gtk-
greeter in Ubuntu.
https://bugs.launchpad.net/bugs/1448214

Title:
  lightdm-gtk-greeter uses 100% CPU and shows gray screen

Status in lightdm-gtk-greeter package in Ubuntu:
  New

Bug description:
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=15.04
  DISTRIB_CODENAME=vivid
  DISTRIB_DESCRIPTION="Ubuntu 15.04"

  Package: lightdm-gtk-greeter 2.0.0-0ubuntu1

  ubuntu-bug output is attached with deatiled system info.

  After upgrading Xubuntu from 14.10 to 15.04 the log in screen remains
  gray and the lightdm-gtk-greeter process consumes 100% CPU on one
  core.

  I expected a login screen. When stopping/starting the service with
  systemctl [re]start|stop lightdm.service

  I recieved "Error: No space left on device." as an error. This was
  misleading as I don't have a space issue.

  I added "allow-debugging=true" to "/etc/lightdm/lightdm-gtk-
  greeter.conf" then I restarted lightdm.

  In the log I could then see that the greeter was switching between
  active monitors endlessly.

  ...
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: Read 8 bytes from daemon
  DEBUG-Message: Read 37 bytes from daemon
  DEBUG-Message: Prompt user with 1 message(s)
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  DEBUG-Message: [Background] Active monitor changed to: DP1 #0
  DEBUG-Message: [Background] Active monitor changed to: HDMI1 #1
  ...

  So I set
  "active-monitor=0" and restarted lightdm. This solved the issue.

  I suspect this may only happen with multi monitor setups and on
  mirrors displays that have a cursor on both. This is unclear to me
  though.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: lightdm-gtk-greeter 2.0.0-0ubuntu1
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Fri Apr 24 12:09:07 2015
  InstallationDate: Installed on 2014-08-06 (261 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  SourcePackage: lightdm-gtk-greeter
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1448214/+subscriptions

Follow ups

References

  Thread Previous • Date Previous • • Thread Next