Ubuntu

Fails to unlock/ resumes to black screen

Bug #1622303 reported by Kev Bowring on 2016-09-11

This bug affects 6 people

	Status	Importance	Assigned to
Ubuntu	Invalid	Undecided	Unassigned
lightdm-gtk-greeter (Ubuntu)	Invalid	Undecided	Unassigned
xfce4-session (Ubuntu)	Invalid	Undecided	Sean Davis
xubuntu-default-settings (Ubuntu)	Fix Released	Undecided	Sean Davis

Bug Description

Lock screen (or suspend)

System allows for password to unlock

No desktop shown after unlocking

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: xfce4-power-manager 1.4.4-4ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-9136.55-generic 4.4.16
Uname: Linux 4.4.0-9136-generic x86_64
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Sep 11 10:04:39 2016
InstallationDate: Installed on 2016-06-11 (91 days ago)
InstallationMedia: Xubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160611)
SourcePackage: xfce4-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)
---
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
CurrentDesktop: XFCE
DistroRelease: Ubuntu 16.10
InstallationDate: Installed on 2016-06-11 (95 days ago)
InstallationMedia: Xubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160611)
Package: light-locker 1.7.0-2ubuntu1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 4.4.0-9136.55-generic 4.4.16
Tags: yakkety
Uname: Linux 4.4.0-9136-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo
_MarkForUpload: True

See original description

Tags:

Revision history for this message

Kev Bowring (flocculant) wrote on 2016-09-11:

Dependencies.txt Edit (6.2 KiB, text/plain; charset="utf-8")
JournalErrors.txt Edit (11.4 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (106 bytes, text/plain; charset="utf-8")

Revision history for this message

Launchpad Janitor (janitor) wrote on 2016-09-11:

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

Changed in xfce4-power-manager (Ubuntu):
status:	New → Confirmed

Kev Bowring (flocculant) on 2016-09-13

affects:

xfce4-power-manager (Ubuntu) → light-locker (Ubuntu)

Revision history for this message

Kev Bowring (flocculant) wrote on 2016-09-14: Dependencies.txt

Dependencies.txt Edit (8.2 KiB, text/plain)

apport information

tags:	added: apport-collected
description:	updated

Revision history for this message

Kev Bowring (flocculant) wrote on 2016-09-14: JournalErrors.txt

JournalErrors.txt Edit (33.4 KiB, text/plain)

apport information

Revision history for this message

Kev Bowring (flocculant) wrote on 2016-09-14: ProcEnviron.txt

ProcEnviron.txt Edit (115 bytes, text/plain)

apport information

Revision history for this message

Sean Davis (bluesabre) wrote on 2016-09-19: Re: Fails to unlock/ resume to black screen

@robert-ancell, We're seeing this breakage starting in Yakkety. Since there have been no changes to light-locker or lightdm-gtk-greeter between Xenial and Yakkety, I was wondering if you knew of any potentially breaking changes in LightDM?

Revision history for this message

Kev Bowring (flocculant) wrote on 2016-09-19:

lightdm.log Edit (9.4 KiB, text/plain)

lightdm log from fail to return from lock session

Revision history for this message

Kev Bowring (flocculant) wrote on 2016-09-21:

more notes - while it appears that the system is still locked - media playing prior to locking can be heard implies to me at least it has unlocked we're just not getting a desktop back

summary:

- Fails to unlock/ resume to black screen
+ Fails to unlock/ resumes to black screen

Revision history for this message

Jack Fromm (jjfrv8) wrote on 2016-09-22:

I don't know if my symptoms are different or not. After I resume, I am able to enter my password to unlock but instead of going to a completely black screen, I get a "This session is locked. You'll be redirected to the unlock dialog automatically in a few seconds" screen.

Revision history for this message

Ubuntu QA Website (ubuntuqa) wrote on 2016-09-22:

#10

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1622303

tags:

added: iso-testing

Revision history for this message

Sean Davis (bluesabre) wrote on 2016-09-22:

#11

Marking this bug as critical as it is a release blocker for 16.10.

Changed in light-locker (Ubuntu):
importance:	Undecided → Critical

Revision history for this message

Sean Davis (bluesabre) wrote on 2016-09-24:

#12

I tagged LightDM and LightDM GTK+ Greeter since they may be directly related.

Brian Murray (brian-murray) on 2016-09-26

tags:

added: rls-y-incoming

Revision history for this message

Sean Davis (bluesabre) wrote on 2016-09-28:

#13

I tried downgrading lightdm (and related packages) to their xenial versions (1.18.x) and the bug persists, so it seems less likely to be directly related to lightdm.

Revision history for this message

Robert Ancell (robert-ancell) wrote on 2016-09-28:

#14

Sorry, didn't notice this bug go past. I can't think of anything that would have changed in LightDM and the log isn't showing anything going wrong. I was going to suggest you try downgrading LightDM but you've done that. My best guess is the session / light-locker haven't realised they've been unlocked for some reason? Either that or something to do with VT switching (driver issues?).

Revision history for this message

Kev Bowring (flocculant) wrote on 2016-09-28:

#15

Reverted to older xubuntu-default-settings - undid https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1627304/comments/18

Reverted to light-locker.

Everything now works as expected.

Revision history for this message

Sean Davis (bluesabre) wrote on 2016-09-28:

#16

@flocculant Thanks for looking into this. I spoke with pitti about this and we correctly identified the issue being related to the session switch to system user units. For now, we'll roll back the session changes.

Affected packages: xfce4-session, xubuntu-default-settings

Changed in xfce4-session (Ubuntu):
assignee:	nobody → Sean Davis (bluesabre)
status:	New → In Progress
Changed in xubuntu-default-settings (Ubuntu):
assignee:	nobody → Sean Davis (bluesabre)
status:	New → In Progress

Revision history for this message

Launchpad Janitor (janitor) wrote on 2016-09-28:

#17

This bug was fixed in the package xubuntu-default-settings - 16.10.2

---------------
xubuntu-default-settings (16.10.2) yakkety; urgency=medium

  * Revert systemd user unit changes (LP: #1622303)
  * usr/share/xsessions/xubuntu.desktop: Switch Exec= line back to
    direct startxfce4 execution.

-- Sean Davis <email address hidden> Wed, 28 Sep 2016 06:02:49 -0400

Changed in xubuntu-default-settings (Ubuntu):
status:	In Progress → Fix Released

Kev Bowring (flocculant) on 2016-09-28

no longer affects:

light-locker (Ubuntu)

Revision history for this message

Launchpad Janitor (janitor) wrote on 2016-09-28:

#18

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

Changed in ubuntu:
status:	New → Confirmed

Kev Bowring (flocculant) on 2016-09-28

affects:

lightdm (Ubuntu) → ubuntu

Kev Bowring (flocculant) on 2016-10-01

Changed in lightdm-gtk-greeter (Ubuntu):
status:	New → Invalid
Changed in ubuntu:
status:	New → Invalid

Revision history for this message

Theo Linkspfeifer (lastonestanding) wrote on 2018-08-16:

#19

It does not look like there needs to be anything fixed in xfce4-session.

Changed in xfce4-session (Ubuntu):
status:	In Progress → Invalid

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