slideshow does not work any more with dark mode

[Haitao Shan]

Hi,

I had ubuntu 22.04, which was upgraded from 21.10 following the link: https://linuxconfig.org/how-to-upgrade-ubuntu-to-22-04-lts-jammy-jellyfish. It has worked well for me until I run "apt update and apt upgrade" around Mar 18. I have wallpaper slideshow setup using shotwell before the upgrade. I noticed my desktop background went to black after the upgrade. I then logged out and logged in. The background was changed to an Ubuntu default. I tried to set desktop slideshow again using shotwell but it never worked any more. From the GUI, I did not see anything abnormal. But the desktop background simply did not change at all.

I guess something was broken by one of the upgraded packages.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: shotwell 0.30.14-1ubuntu2
ProcVersionSignature: Ubuntu 5.15.0-22.22-generic 5.15.19
Uname: Linux 5.15.0-22-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu79
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 21 11:29:40 2022
InstallationDate: Installed on 2021-08-27 (205 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: shotwell
UpgradeStatus: Upgraded to jammy on 2022-02-08 (41 days ago)

[Sebastien Bacher (seb128)]

Thank you for your bug report. Where are the images you are using for the slideshow stored? Could you add a 'journalctl -b 0' log from the session showing the issue?

[Haitao Shan (ttttao)]

Log attached.
What I did was: 1> boot up Ubuntu; 2> use shotwell to set slideshow and close it. 3> run the command you give to me.

Original my wallpapers are stored /home/<username>/Pictures/Wallpapers. I don't know whether shotwell will maintain a copy somewhere after importing.

[Alexandru Buhnici (alexmro)]

I have this exact issue, after an update around the same date.
I can see the images are copied to /home/<username>/.local/share/shotwell/wallpaper/ and the XML is created with correct paths but that's it.
The wallpaper is not changed nor is the slideshow added to the list of wallpapers.

There's no .local/share/gnome-background-properties folder, either (which is where the configuration would be, apparently). I had to manually place an XML file inside the gnome-background-properties folder to make it work

[Haitao Shan (ttttao)]

Thanks for sharing your experience. I took a look at my .local/share and saw shotwell/wallpaper/ and the XML. I did not have .local/share/gnome-background-properties either. However, if I copied the XML to gnome-background-properties, it did not work for me.

I've tried to install Ubuntu 22.04 beta in a virtual machine and the slideshow seems to work fine. I guess maybe this is a bug that only appears when "apt upgrade". If that is the case, I think eventually no one will fix the issue for me as any Ubuntu developer can mark the bug something like "can't reproduce".

[Alexandru Buhnici (alexmro)]

You don't have to copy the XML generated by shotwell to gnome-background-properties. You have to create a different XML (I named it wallpaper.xml) with this code that points to the XML from shotwell:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
<wallpapers>
 <wallpaper deleted="false">
  <name>Shotwell</name>
  <filename>/home/<user>/.local/share/shotwell/wallpaper/wallpaper.xml</filename>
  <options>zoom</options>
 </wallpaper>
</wallpapers>

Now, if you go to the wallpapers settings you will se your slideshow there

[Haitao Shan (ttttao)]

Thanks for the detailed information. I will have a try later when I am at home.

Haitao by outlook mobile
________________________________
From: <email address hidden> <email address hidden> on behalf of Alexandru Buhnici <email address hidden>
Sent: Saturday, April 2, 2022 10:01:59 AM
To: <email address hidden> <email address hidden>
Subject: [Bug 1965812] Re: After "apt upgrade" around Mar 18, shotwell desktop slideshow does not work any more

You don't have to copy the XML generated by shotwell to gnome-
background-properties. You have to create a different XML (I named it
wallpaper.xml) with this code that points to the XML from shotwell:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
<wallpapers>
        <wallpaper deleted="false">
                <name>Shotwell</name>
                <filename>/home/<user>/.local/share/shotwell/wallpaper/wallpaper.xml</filename>
                <options>zoom</options>
        </wallpaper>
</wallpapers>

Now, if you go to the wallpapers settings you will se your slideshow
there

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1965812

Title:
  After "apt upgrade" around Mar 18, shotwell desktop slideshow does not
  work any more

Status in shotwell package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  I had ubuntu 22.04, which was upgraded from 21.10 following the link:
  https://linuxconfig.org/how-to-upgrade-ubuntu-to-22-04-lts-jammy-
  jellyfish. It has worked well for me until I run "apt update and apt
  upgrade" around Mar 18. I have wallpaper slideshow setup using
  shotwell before the upgrade. I noticed my desktop background went to
  black after the upgrade. I then logged out and logged in. The
  background was changed to an Ubuntu default. I tried to set desktop
  slideshow again using shotwell but it never worked any more. From the
  GUI, I did not see anything abnormal. But the desktop background
  simply did not change at all.

  I guess something was broken by one of the upgraded packages.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: shotwell 0.30.14-1ubuntu2
  ProcVersionSignature: Ubuntu 5.15.0-22.22-generic 5.15.19
  Uname: Linux 5.15.0-22-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu79
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Mar 21 11:29:40 2022
  InstallationDate: Installed on 2021-08-27 (205 days ago)
  InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: shotwell
  UpgradeStatus: Upgraded to jammy on 2022-02-08 (41 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/shotwell/+bug/1965812/+subscriptions

[Haitao Shan (ttttao)]

Hi, Alexandru,

That xml does not work either. However, I happened to find out the root cause in my system. That is related to dark mode wallpaper. See https://twitter.com/alexm_gnome/status/1491527119389827074?s=20&t=j6y1hOlJlHulg57Ild47xA.

Once I set org.gnome.desktop.background.picture-url-dark to the same value in picture-url, my slideshow is back.

I think shotwell just blindly set the picture-url key without knowing picture-url-dark key.

[Jens Georg (yg-jensge)]

this might fix it: https://gitlab.gnome.org/GNOME/shotwell/-/commit/cfd4249398b16e1c36891e6265fd8d95783e2cb9

[Sebastien Bacher (seb128)]

Thanks Jens!

[Jeremy Bícha (jbicha)]

Jens, thank you for the fix.

That schema was introduced in gsettings-desktop-schemas 42~beta. How about moving the new lines you added below this line:

set_gs_string(schema_names[p], key_names[p], converted_val);

That way, it will still set the non-dark background even if the dark background schema doesn't exist. It will emit an error on the command line about the non-existent key but maybe that's ok too.

[Jens Georg (yg-jensge)]

Ah! right, good point

[Launchpad Janitor (janitor)]

This bug was fixed in the package shotwell - 0.30.14-1ubuntu5

---------------
shotwell (0.30.14-1ubuntu5) jammy; urgency=medium

  * Cherry-pick patch to also set dark wallpaper (LP: #1965812)

 -- Jeremy Bicha <email address hidden> Mon, 04 Apr 2022 16:53:50 -0400