Unable to login from 'ctrl+alt+l', need to click switchuser & then login succeeds

[K.Mani]

I unintentionally changed permissions of the files in root directory. Hence I'm seeing login issues.

I'm Unable to login from 'ctrl+alt+l' or Screen lock after normal 'Power Save'. On entering the correct password the machine fails to unlock.
I Need to click 'Switch User' & then the screen takes to main login screen, where on entering the password, the login succeeds

lsb_release -rd
Description: Ubuntu 12.04.4 LTS
Release: 12.04

apt-cache policy
Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu/ precise/main i386 Packages
     release v=12.04,o=LP-PPA-nilarimogard-webupd8,a=precise,n=precise,l=WebUpd8,c=main
     origin ppa.launchpad.net
 500 http://archive.canonical.com/ubuntu/ precise/partner i386 Packages
     release v=12.04,o=Canonical,a=precise,n=precise,l=Partner archive,c=partner
     origin archive.canonical.com
etc...

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-screensaver 3.4.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55
Uname: Linux 3.2.0-60-generic i686
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Sun Apr 20 12:19:20 2014
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session idle-delay uint32 600
 org.gnome.desktop.session session-name 'ubuntu'
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: gnome-screensaver
UpgradeStatus: No upgrade log present (probably fresh install)
WindowManager: No value set for `/desktop/gnome/session/required_components/windowmanager'

------------------------------------------------
mani@mani:/usr/bin$ cat ~/.xsession-errors
sudo: no tty present and no askpass program specified
Sorry, try again.
sudo: no tty present and no askpass program specified
Sorry, try again.
sudo: no tty present and no askpass program specified
Sorry, try again.
sudo: 3 incorrect password attempts
openConnection: connect: No such file or directory
cannot connect to brltty at :0
Backend : gconf
Integration : true
Profile : unity
Adding plugins
Initializing core options...done
Initializing composite options...done
Initializing opengl options...done
Initializing decor options...done
Initializing vpswitch options...done
Initializing snap options...done
Initializing mousepoll options...done
Initializing resize options...done
Initializing place options...done
Initializing move options...done
Initializing wall options...done
Initializing grid options...done
I/O warning : failed to load external entity "/home/mani/.compiz/session/102236637c9534da23139796237992205300000017570037"
Initializing session options...done
Initializing gnomecompat options...done
Initializing animation options...done
Initializing fade options...done
Initializing unitymtgrabhandles options...done
Initializing workarounds options...done
Initializing scale options...done
compiz (expo) - Warn: failed to bind image to texture
Initializing expo options...done
** Message: applet now removed from the notification area
Initializing ezoom options...done

(compiz:1834): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed
** Message: using fallback from indicator to GtkStatusIcon
Initializing unityshell options...done
Setting Update "main_menu_key"
Setting Update "run_key"
** Message: moving back from GtkStatusIcon to indicator

** (gnome-screensaver:2403): WARNING **: screensaver already running in this session

** (zeitgeist-datahub:2412): WARNING **: zeitgeist-datahub.vala:227: Unable to get name "org.gnome.zeitgeist.datahub" on the bus!

** (nautilus:1848): WARNING **: Error calling current_status: Method "current_status" with signature "" on interface "com.ubuntuone.SyncDaemon.Status" doesn't exist

** (nautilus:1848): CRITICAL **: syncdaemon_status_info_get_online: assertion `SYNCDAEMON_IS_STATUS_INFO (sinfo)' failed
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

(gnome-settings-daemon:1826): color-plugin-WARNING **: Done switch to new account, reload devices

(gnome-settings-daemon:1826): color-plugin-WARNING **: Done switch to new account, reload devices
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

(gnome-settings-daemon:1826): color-plugin-WARNING **: Done switch to new account, reload devices
2014-04-20 12:25:59,617 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2014-04-20 12:25:59,695 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2014-04-20 12:26:00,440 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2014-04-20 12:26:00,678 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None.
2014-04-20 12:26:00,680 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
2014-04-20 12:26:06,427 - softwarecenter.backend.reviews - WARNING - error creating bsddb: '(12, 'Cannot allocate memory -- unable to allocate memory for mutex; resize mutex region')' (corrupted?)
2014-04-20 12:26:06,794 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/share/software-center/softwarecenter/utils.py', 201, 'get_title_from_html')'
2014-04-20 12:26:06,794 - root - WARNING - failed to parse: '<div style="background-color: #161513; width:1680px; height:200px;">
 <div style="background: url('/site_media/exhibits/2013/09/AAMFP_Leaderboard_700x200_1.jpg') top left no-repeat; width:700px; height:200px;"></div>
</div>' ('ascii' codec can't encode character u'\xa0' in position 70: ordinal not in range(128))
2014-04-20 12:26:13,646 - softwarecenter.db.update - INFO - skipping region restricted app: 'Bulleti d'esquerra de Calonge i Sant Antoni ' (not whitelisted)
2014-04-20 12:26:14,263 - softwarecenter.db.update - INFO - skipping region restricted app: 'Just Play MP3' (not whitelisted)
2014-04-20 12:26:14,283 - softwarecenter.db.update - INFO - skipping region restricted app: 'Source Code Analyzer' (not whitelisted)
2014-04-20 12:26:14,623 - softwarecenter.db.update - INFO - skipping region restricted app: 'Flaggame' (not whitelisted)
2014-04-20 12:26:14,863 - softwarecenter.db.update - INFO - skipping region restricted app: 'Comentarios Web' (not whitelisted)
2014-04-20 12:26:17,136 - softwarecenter.ui.gtk3.app - INFO - software-center-agent finished with status 0
2014-04-20 12:26:17,136 - softwarecenter.db.database - INFO - reopen() database
2014-04-20 12:26:17,137 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2014-04-20 12:26:39,392 - softwarecenter.backend.login_sso - INFO - _on_authorization_denied: Ubuntu Software Center

(gnome-settings-daemon:1826): color-plugin-WARNING **: Done switch to new account, reload devices
gnome-session[1757]: WARNING: Detected that screensaver has left the bus
gnome-session[1757]: WARNING: Detected that screensaver has left the bus
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

(gnome-settings-daemon:1826): color-plugin-WARNING **: Done switch to new account, reload devices
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

(firefox:2361): Gtk-CRITICAL **: IA__gtk_clipboard_set_with_data: assertion `targets != NULL' failed
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

(gnome-terminal:6351): Vte-2.90-WARNING **: Attempt to set invalid NRC map '\xf3'.
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[K.Mani (sailormani)]

Hi Oliver

The bug is FIXED & Kindly close the bug.
/sbin/unix_chkpwd & /etc/shadow permission changed.

Regards
Mani

On 5/19/14, Oliver <email address hidden> wrote:
> *** This bug is a duplicate of bug 1320896 ***
> https://bugs.launchpad.net/bugs/1320896
>
> ** This bug has been marked a duplicate of bug 1320896
> cann't unlock screensaver
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1310183
>
> Title:
> Unable to login from 'ctrl+alt+l', need to click switchuser & then
> login succeeds
>
> Status in “gnome-screensaver” package in Ubuntu:
> Confirmed
>
> Bug description:
> I unintentionally changed permissions of the files in root directory.
> Hence I'm seeing login issues.
>
> I'm Unable to login from 'ctrl+alt+l' or Screen lock after normal 'Power
> Save'. On entering the correct password the machine fails to unlock.
> I Need to click 'Switch User' & then the screen takes to main login
> screen, where on entering the password, the login succeeds
>
> lsb_release -rd
> Description: Ubuntu 12.04.4 LTS
> Release: 12.04
>
> apt-cache policy
> Package files:
> 100 /var/lib/dpkg/status
> release a=now
> 500 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu/ precise/main
> i386 Packages
> release
> v=12.04,o=LP-PPA-nilarimogard-webupd8,a=precise,n=precise,l=WebUpd8,c=main
> origin ppa.launchpad.net
> 500 http://archive.canonical.com/ubuntu/ precise/partner i386 Packages
> release v=12.04,o=Canonical,a=precise,n=precise,l=Partner
> archive,c=partner
> origin archive.canonical.com
> etc...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 12.04
> Package: gnome-screensaver 3.4.1-0ubuntu1
> ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55
> Uname: Linux 3.2.0-60-generic i686
> ApportVersion: 2.0.1-0ubuntu17.6
> Architecture: i386
> Date: Sun Apr 20 12:19:20 2014
> GnomeSessionIdleInhibited: No
> GnomeSessionInhibitors: None
> GsettingsGnomeSession:
> org.gnome.desktop.session idle-delay uint32 600
> org.gnome.desktop.session session-name 'ubuntu'
> InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386
> (20100429)
> MarkForUpload: True
> ProcEnviron:
> TERM=xterm
> PATH=(custom, no user)
> LANG=en_IN
> SHELL=/bin/bash
> SourcePackage: gnome-screensaver
> UpgradeStatus: No upgrade log present (probably fresh install)
> WindowManager: No value set for
> `/desktop/gnome/session/required_components/windowmanager'
>
>
> ------------------------------------------------
> mani@mani:/usr/bin$ cat ~/.xsession-errors
> sudo: no tty present and no askpass program specified
> Sorry, try again.
> sudo: no tty present and no askpass program specified
> Sorry, try again.
> sudo: no tty present and no askpass program specified
> Sorry, try again.
> sudo: 3 incorrect password attempts
> openConnection: connect: No such file or directory
> cannot connect to brltty at :0
> Backend : gconf
> Integration : true
> Profile : unity
> Adding plugins
> Initializing core options...done
> Initializing compo...