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Bug#929834: marked as done (lightdm-gtk-greeter: After locking screen, display is turned off and unlock prompt is not visible.)

Your message dated Wed, 2 Dec 2020 19:09:07 +0100
with message-id <X8fYQ0wpG/6eY9tb@pivert.maison>
and subject line Re: Bug#972417: xfce4-power-manager: System left idle => 'display power management' auto-locks session => no X session or lightdm greeter
has caused the Debian Bug report #972417,
regarding lightdm-gtk-greeter: After locking screen, display is turned off and unlock prompt is not visible.
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
972417: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=972417
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: lightdm-gtk-greeter
Version: 2.0.6-1
Severity: important

Dear Maintainer,

   * What led up to the situation?

Perform a clean install of testing using the RC1 netinst CD and selected XFCE desktop environment. 

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Log into the system from the lightdm login window, and lock the screen.

   * What was the outcome of this action?

Screen got locked and the disply got turned off (monitor entered power save). No unlock prompt was displayed, but typing the password blindly unlocked the session.

   * What outcome did you expect instead?

Screen gets locked, and an unlock prompt is displayed.

Additional info:

After locking the screen, when the display gets turned off, switching to a different VT and back displays the unlock prompt as usual and everything works as expected. This problem does not occur when switching the greeter from lightdm-gtk-greeter to slick-greeter.

References:
1. https://lists.debian.org/debian-user/2019/05/msg01477.html
2. https://lists.debian.org/debian-devel/2019/06/msg00000.html

Thanks,
Raj Kiran

-- System Information:
Debian Release: 10.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-5-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_IN, LC_CTYPE=en_IN (charmap=UTF-8), LANGUAGE=en_IN:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages lightdm-gtk-greeter depends on:
ii  libc6                   2.28-10
ii  libcairo2               1.16.0-4
ii  libgdk-pixbuf2.0-0      2.38.1+dfsg-1
ii  libglib2.0-0            2.58.3-1
ii  libgtk-3-0              3.24.5-1
ii  libindicator3-7         0.5.0-4
ii  liblightdm-gobject-1-0  1.26.0-4
ii  libx11-6                2:1.6.7-1

Versions of packages lightdm-gtk-greeter recommends:
ii  adwaita-icon-theme  3.30.1-1
ii  desktop-base        10.0.2
ii  gnome-themes-extra  3.28-1
ii  policykit-1         0.105-25

lightdm-gtk-greeter suggests no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
Dear Yves-Alexis,

Thanks for your reply.

I am happy to announce that this bug #972417 disappeared, even if I don't know what solved it.
Bug occurred until Nov 4th 2020, at least.
Bug did not occur from (at least) Nov 21st 2020, and did not reoccur until today.
Thus I'll close this bug report.

For the record let me answer your points:

> The lightdm greeter is on tty8, so try with Ctrl-Alt-F8.
When bug occurred, tty8 remained black.

> With all those bugs already opened and the mess we're already in, why opening
> *yet another one*? Honestly it adds more confusion than anything at that
> point.
Because this bug report was filled against xfce4-power-manager, due to reasons explained in '[ Guilty package ]'.
Other reports that I listed were all filled against other packages. None against xfce4-power-manager yet.
Sorry that it got felt as 'confusing', that was not intended.

> As indicated in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870641#218
> the bug *should* be fixed in 10.5 with kernel 4.19.0-10. You indicated that
> you tested with linux-image-4.19.0-11-amd64-unsigned     4.19.146-1
> 
> Can you retry with that kernel and check you have the “atomic” message in the
> kernel log:
> 
> broken atomic modeset userspace detected, disabling atomic

I tested when bug still occurred. Results:

1) with current stable kernel: linux-image-4.19.0-12-amd64   4.19.152-1
- Bug still occurred
- I could not find "broken atomic modeset userspace detected, disabling atomic" in kernel log, ie nothing found by
  - grep -ri "broken atomic" /var/log
  - dmesg | grep -i "broken atomic"

2) with old old stable kernel: linux-image-4.19.0-10-amd64   4.19.132-1
- Bug still occurred
- I could not find "broken atomic modeset userspace detected, disabling atomic" in kernel log, ie nothing found by
  - grep -ri "broken atomic" /var/log
  - dmesg | grep -i "broken atomic"

Regards,
Franck

--- End Message ---
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