[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Launchpad Bug Tracker]

** Branch linked: lp:lightdm/1.10

** Branch linked: lp:lightdm/1.18

** Branch linked: lp:lightdm/1.20

** Branch linked: lp:lightdm

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Title:
  Returning to existing session is unreliable and can leave on blank
  screen

Status in Light Display Manager:
  Fix Committed
Status in Light Display Manager 1.10 series:
  Fix Committed
Status in Light Display Manager 1.18 series:
  Fix Committed
Status in Light Display Manager 1.20 series:
  Fix Committed
Status in lightdm package in Ubuntu:
  In Progress
Status in lightdm source package in Trusty:
  Triaged
Status in lightdm source package in Xenial:
  Triaged
Status in lightdm source package in Yakkety:
  Triaged

Bug description:
  [Impact]
  Due to a logic bug LightDM returning to an existing session from a greeter 
can be unreliable. This case is common in systems which use the greeter as a 
lock screen.

  The bug was introduced in revision 1954 to fix bug 1296276. The race
  condition seems to have been made more likely to the change in
  revision 2437 to fix bug 1637758.

  [Test Case]
  1. Log into a session
  2. Switch to the greeter (e.g. dm-tool switch-to-greeter)
  3. Log in again

  Expected result
  Returned to existing session

  Observed result
  Not always returned, can end up on blank screen. Since this is a race 
condition this may not occur on some systems.

  [Regression Potential]
  Low, the fix is to correct a logic bug that made LightDM think it hadn't 
stopped a session correctly.

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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Robert Ancell]

** Also affects: lightdm
   Importance: Undecided
   Status: New

** Also affects: lightdm/1.10
   Importance: Undecided
   Status: New

** Also affects: lightdm/1.21
   Importance: Undecided
   Status: New

** Also affects: lightdm/1.18
   Importance: Undecided
   Status: New

** Also affects: lightdm/1.20
   Importance: Undecided
   Status: New

** No longer affects: lightdm/1.21

** Also affects: lightdm (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: light-locker (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: lightdm (Ubuntu Yakkety)
   Importance: Undecided
   Status: New

** Also affects: light-locker (Ubuntu Yakkety)
   Importance: Undecided
   Status: New

** Also affects: lightdm (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Also affects: light-locker (Ubuntu Xenial)
   Importance: Undecided
   Status: New

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Title:
  Returning to existing session is unreliable and can leave on blank
  screen

Status in Light Display Manager:
  New
Status in Light Display Manager 1.10 series:
  New
Status in Light Display Manager 1.18 series:
  New
Status in Light Display Manager 1.20 series:
  New
Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress
Status in light-locker source package in Trusty:
  New
Status in lightdm source package in Trusty:
  New
Status in light-locker source package in Xenial:
  New
Status in lightdm source package in Xenial:
  New
Status in light-locker source package in Yakkety:
  New
Status in lightdm source package in Yakkety:
  New

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Robert Ancell]

I'm also finding it to be unreliable. It seems to be a race condition
between the greeter quitting and the session starting. I suspect the use
of logind has made this race more likely.

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Henk Terhell]

Same experience on my updated Lubuntu 17.04.

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[flocculant]

** Attachment added: "seat0-greeter.log"
   
https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1656399/+attachment/4823519/+files/seat0-greeter.log

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[flocculant]

@robert - I've seen reports from xubuntu testers where it was sometimes
working. So I tried more on a completely brand new installation.

Lock - unlock fails - this continued for 3 attempts at which point I reached 
desktop.
Lock and unlock cycle next time took 2 attempts.
Lock and unlock cycle next time took 1 attempt.

I was then able to lock and unlock at will.

Attached all /var/log/lightdm logs from that session.

** Attachment added: "lightdm.log"
   
https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1656399/+attachment/4823518/+files/lightdm.log

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[flocculant]

In my used and abused installation I see similar behaviour.

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1656399/+subscriptions

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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[flocculant]

** Attachment added: "x-0_x-1.log"
   
https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1656399/+attachment/4823520/+files/x-0_x-1.log

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You received this bug notification because you are a member of Ubuntu
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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[flocculant]

@Gunnar - thank you

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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1656399

Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Gunnar Hjalmarsson]

On 2017-02-20 08:27, flocculant wrote:
> really wish people wouldn't fiddle with bug status

Reversed the latest change.

** Changed in: light-locker (Ubuntu)
   Status: Fix Released => Confirmed

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1656399

Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1656399/+subscriptions

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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[flocculant]

really wish people wouldn't fiddle with bug status

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1656399

Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Fix Released
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Rikhi Bose]

** Changed in: light-locker (Ubuntu)
   Status: Confirmed => Fix Released

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You received this bug notification because you are a member of Ubuntu
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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Fix Released
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[AJ Fite]

This is effecting me on Xubuntu 17.04

Intel Skylake i7 with HD530 Graphics (Lenovo Thninkpad T460s)

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Ian Bruntlett]

It happens to me, too.
==
Something (big) cropped up. When I returned to my NetBook, the screen had 
locked. Typed my password in. System then (visually) unlocked itself, paused 
briefly and then locked me back out again. You can test this more quickly by 
using the keyboard shortcut of CTRL+ALT+l

Naturally I thought I'd got the password wrong. Tried typing in the
password in upper case and it didn't do the above - it gave a red error
message, pretty much expected.

The only way I could get into a locked system again was to chose a
"Shutdown" menu option.

Played around with it for a bit. Managed to unlock the NetBook
successfully once - then it resumed its unhelpful behaviour.


And here are my system's details.
=
On 28 January 2017 at 02:55, Simon Quigley  wrote:

Lubuntu Zesty Zapus Alpha 2 (soon to be 17.04) has been released!

OK. Used your link and downloaded MD5SUMS and zesty-desktop-i386.iso. Ran 
md5sum and it checked out OK:-
1c3f420bb80754bc3b31eb479d77e3b5  zesty-desktop-i386.iso

Used Startup Disc Creator on a 4GB USB flash drive.

Hardware used to install iso on:

Samsung NC10 - hawking
Intel Atom N270, 1.66GHz, 32-bit, 2GiB RAM, 149.05 GiB hard drive, no optical 
drive, Ethernet and WiFi connections
Full details see here:- https://gist.github.com/21b61903871ee685fc79

Booted install media without Ethernet cable connected. Had to reboot
system after connecting Ethernet cable before it was happy to continue
the update. Opted for "Download updates while installing Lubuntu" and
"Install third-party software". Chose option to wipe hard drive and
install Lubuntu on top of it. Put in a hostname of "hawking" for this
NetBook. Installer said there was already another system on the network
called "hawking". Decided not to argue so named the system "hawking2".

Install completed successfully and asked for the (installation) storage
medium at a suitable time.

Rebooted system, logged in. The start/swift menu icon isn't present. Ran
Software Updater OK. Saw an email on lubuntu-devel complaining about
Firefox not working. On my NetBook, ran Firefox (version 50.1.0) ran
fine and I Googled "Hello World".

Normally I only use the "alternate" iso images and in the install I
repartition the hard drive manually. For some reason I did it a little
differently this time :)

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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1656399

Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1656399/+subscriptions

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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[Robert Ancell]

It turns out I can reproduce this with unity-greeter (on zesty). I get the 
following:
1. Log into session from greeter
2. Switch to greeter and log in again
(returned to session)
3. Switch to greeter and log in again
Switched to black screen, can manually VT switch back to session but need to 
unlock it from screen locker.
4. Switch to greeter and log in again
Returned to session, but screen locker shown.

There were a couple of bugs regarding signals and return values from
greeters which I have fixed in lp:lightdm, but these don't seem to have
caused the issue.

Still investigating...

** Changed in: lightdm (Ubuntu)
 Assignee: (unassigned) => Robert Ancell (robert-ancell)

** Changed in: lightdm (Ubuntu)
   Status: Confirmed => In Progress

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You received this bug notification because you are a member of Ubuntu
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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  In Progress

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[sudodus]

This bug seems to affect Lubuntu Alternate too, according to the test
case

'Alternate Install (Encryption) in Lubuntu Alternate i386 in Zesty
Daily'

http://iso.qa.ubuntu.com/qatracker/milestones/371/builds/141408/testcases/1439/results

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  Confirmed

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1656399] Re: Unable to unlock session after suspend using lightdm-gtk-greeter.

[sudodus]

This bug seems to affect Lubuntu Zesty alpha 2. It affects all Lubuntu
test cases.

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Title:
  Unable to unlock session after suspend using lightdm-gtk-greeter.

Status in light-locker package in Ubuntu:
  Confirmed
Status in lightdm package in Ubuntu:
  Confirmed

Bug description:
  Unable to unlock Xubuntu XFCE session after suspend. I'm presented
  with unlock screen, and entering credentials will redirect to a black
  screen with "This session is locked", and "you will be redirected to
  unlock screen".

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1656399/+subscriptions

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