Package: screenruler
Version: 0.960+bzr41+deb10-4
I use Gnome on Wayland. Reproduce:
1) Open uxterm, bash being my shell.
2) Type in
screenruler
and press [Enter].
3) Observe:
$ screenruler Loading libraries... Gtk-Message: 00:03:09.619: Failed to load module "canberra-gtk-module" /usr/bin/screenruler:61:in `block in <main>': 'Gdk::Pixbuf' has been deprecated. Use 'GdkPixbuf::Pixbuf'. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. Creating windows... Gtk-WARNING **: Unknown property: GtkWindow.has-resize-grip from /usr/share/screenruler/utils/glade_window.rb:29:in `initialize' from /usr/share/screenruler/ruler_window.rb:51:in `initialize' from /usr/bin/screenruler:76:in `new' from /usr/bin/screenruler:76:in `<main>' Reading settings... Presenting ruler... Shutting down...
$ sudo aptitude show gnome|grep Version Version: 1:3.38+3
I would be happy if I could kindly ask that my bug report finds attention.

severity 1000230 grave
thanks
Btw., installing canberra-gtk-module doesn't help. Severity bumped because the package is useless.

Dear Peter,

please can you check whether installing the package
libcanberra-gtk3-module solves your issue?

If so, this package is probably missing as a dependency for screenruler,
and I can easily fix this bug.

Best regards,			Georges.

Peter Mueller a écrit :

Dear George,
On one of the two Debian-stable machines I manage libcanberra-gtk3-module is installed:
$ LANG=en_US.utf8 sudo aptitude show libcanberra-gtk3-module | egrep "(State)|(Version)" Version: 0.30-7 State: installed
On this machine, screenruler works. I'll check the other machine in several days and let you know.

We believe that the bug you reported is fixed in the latest version of
screenruler, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1000230@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Georges Khaznadar <georgesk@debian.org> (supplier of updated screenruler package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Fri, 26 Nov 2021 19:41:58 +0100
Source: screenruler
Architecture: source
Version: 0.960+bzr41+deb10-5
Distribution: unstable
Urgency: medium
Maintainer: Georges Khaznadar <georgesk@debian.org>
Changed-By: Georges Khaznadar <georgesk@debian.org>
Closes: 1000230
Changes:
 screenruler (0.960+bzr41+deb10-5) unstable; urgency=medium
 .
   * added a dependency on ibcanberra-gtk3-module. Closes: #1000230
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On the other machine, libcanberra-gtk3-module IS installed, but screenruler still fals to start:
$ LANG=C sudo aptitude show screenruler | egrep "(State)|(Version)" Version: 0.960+bzr41+deb10-4 State: installed $ LANG=C sudo aptitude show libcanberra-gtk3-module | egrep "(State)|(Version)" Version: 0.30-7 State: installed $ screenruler Loading libraries... Gtk-Message: 19:09:53.082: Failed to load module "canberra-gtk-module" /usr/bin/screenruler:61:in `block in <main>': 'Gdk::Pixbuf' has been deprecated. Use 'GdkPixbuf::Pixbuf'. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. Creating windows... Gtk-WARNING **: Unknown property: GtkWindow.has-resize-grip from /usr/share/screenruler/utils/glade_window.rb:29:in `initialize' from /usr/share/screenruler/ruler_window.rb:51:in `initialize' from /usr/bin/screenruler:76:in `new' from /usr/bin/screenruler:76:in `<main>' Reading settings... Presenting ruler... Shutting down... $
So, the issue is unrelated to the libcanberra-gtk3-module or related to more than just that.
Does the screenruler version from unstable anyhow have this issue fixed or was only the (probably useless) dependency added?

reopen 1000230
found 1000230 0.960+bzr41+deb10-6
thanks
The updated screenruler still fails to start:
$ LANG=C sudo aptitude show screenruler | egrep "(State)|(Version)" Version: 0.960+bzr41+deb10-6 State: installed $ LANG=C sudo aptitude show libcanberra-gtk3-module | egrep "(State)|(Version)" Version: 0.30-8 State: installed (0.30-7), upgrade available (0.30-8) $ screenruler Loading libraries... Gtk-Message: 19:15:32.635: Failed to load module "canberra-gtk-module" /usr/bin/screenruler:61:in `block in <main>': 'Gdk::Pixbuf' has been deprecated. Use 'GdkPixbuf::Pixbuf'. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. Creating windows... Gtk-WARNING **: Unknown property: GtkWindow.has-resize-grip from /usr/share/screenruler/utils/glade_window.rb:29:in `initialize' from /usr/share/screenruler/ruler_window.rb:51:in `initialize' from /usr/bin/screenruler:76:in `new' from /usr/bin/screenruler:76:in `<main>' Reading settings... Presenting ruler... Shutting down... $
Reopening the bug report. I'd be glad if I could ask that this bug finds attention.

Peter Mueller a écrit :

Dear Peter,

the getter and the setter for the property GtkWindow.has-resize-grip are
defined in the file /usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2404.20 on
my computer; the last message reported before the crash is
"Unknown property: GtkWindow.has-resize-grip from /usr/share/screenruler/utils/glade_window.rb"

Please can you tell me the version number of your package libgtk-3-0?

Best regards,			Georges.

On the machine with the working screenruler, we have this at the moment: $ screenruler & [1] 82945 $ Loading libraries... /usr/bin/screenruler:61:in `block in <main>': 'Gdk::Pixbuf' has been deprecated. Use 'GdkPixbuf::Pixbuf'. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. Creating windows... Gtk-WARNING **: Unknown property: GtkWindow.has-resize-grip from /usr/share/screenruler/utils/glade_window.rb:29:in `initialize' from /usr/share/screenruler/ruler_window.rb:51:in `initialize' from /usr/bin/screenruler:76:in `new' from /usr/bin/screenruler:76:in `<main>' Reading settings... Presenting ruler... $ sudo aptitude show screenruler| grep Version Version: 0.960+bzr41+deb10-4 $ sudo aptitude show libgtk-3-0| grep Version Version: 3.24.24-4 $ LANG=C ls -la /usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2404.20 -rw-r--r-- 1 root root 8042616 May   2   2021 /usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2404.20 Notice that a message concerning has-resize-grip is shown. I'm going to report the results from the other machine (where the screenruler, on the contrary, doesn't work) in short.

On the machine with a not working screenruler, we have this at the moment:
$ screenruler & [1] 2926 $ Loading libraries... Gtk-Message: 02:43:39.844: Failed to load module "canberra-gtk-module" /usr/bin/screenruler:61:in `block in <main>': 'Gdk::Pixbuf' has been deprecated. Use 'GdkPixbuf::Pixbuf'. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. /usr/lib/ruby/vendor_ruby/gdk_pixbuf2/deprecated.rb:48:in `new': GdkPixbuf::Pixbuf.new(path) is deprecated. Use GdkPixbuf::Pixbuf.new(:file => path) instead. Creating windows... Gtk-WARNING **: Unknown property: GtkWindow.has-resize-grip from /usr/share/screenruler/utils/glade_window.rb:29:in `initialize' from /usr/share/screenruler/ruler_window.rb:51:in `initialize' from /usr/bin/screenruler:76:in `new' from /usr/bin/screenruler:76:in `<main>' Reading settings... Presenting ruler... Shutting down...
[1]+ Fertig screenruler $ sudo aptitude show screenruler|grep Version Version: 0.960+bzr41+deb10-6 $ sudo aptitude show libgtk-3-0| grep Version Version: 3.24.24-4 $ LANG=C ls -la /usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2404.20 -rw-r--r-- 1 root root 8042616 May 2 2021 /usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2404.20 $

We believe that the bug you reported is fixed in the latest version of
screenruler, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1000230@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Georges Khaznadar <georgesk@debian.org> (supplier of updated screenruler package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 21 Feb 2022 16:38:37 +0100
Source: screenruler
Architecture: source
Version: 1.0-2
Distribution: unstable
Urgency: medium
Maintainer: Georges Khaznadar <georgesk@debian.org>
Changed-By: Georges Khaznadar <georgesk@debian.org>
Closes: 1000230 1006168
Changes:
 screenruler (1.0-2) unstable; urgency=medium
 .
   * modified a dependency: ruby-gtk2 => ruby-gtk3.
     maybe ... Closes: #1006168
   * clear a previous bug report also. Closes: #1000230
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reopen 1000230
found 1000230 1.0-2
thanks
--
1.0-2 works now.  Thanks a lot!!!  However, some error messages emerge.
1. Starting screenruler and switching four times with Alt-Tab between the screen ruler and the xterm or gnome-terminal from where the screenruler was started, I see the following in the console :
screenruler & [1] 11847 $ Loading libraries... Creating windows... Reading settings... Presenting ruler... Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133
(Switching ones to thrice causes no messages, probably due to buffering, though I can't really prove that.) More switching leads to this on the console:
Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674
After that, I was unable to get genuinely newer messages, only the copies of the above, in some order in blocks of 4.
2. A second-mouse-button click on the screenruler to call its menu does call the menu but prints the following to the console :
Gdk-Message: 14:19:12.255: Window 0x558616afc850 is a temporary window without parent, application will not be able to position it on screen. Gdk-CRITICAL **: gdk_wayland_window_handle_configure_popup: assertion 'impl->transient_for' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:598:in `invoke' from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:103:in `block in define_singleton_method' from ./screenruler.rb:91:in `<main>'
Since the errors are marked as CRITICAL, I presume that something wrong goes there.
Thanks in advance for looking into it,
Peter

Thank you for the bug report, Peter.

However, I shall not try to fix it shortly.

I suspect that those errors are due to some wrong interaction between
Ruby and Gnome libraries at some point, but I did not find enough
information about those "critical" errors when I tried to fix them in
the past.

Those errors did not entail misbehaviors of the application so far (as I
could check individually), and most users will not even notice them when
they launch screenruler from a graphic menu.

Best regards,			Georges.

Peter Mueller a écrit :

found 1000230 1.0-2
severity 1000230 normal
--
Got it. Thanks anyway, Georges!
Peter
24.02.2022, 16:56, Georges Khaznadar < mailto:georges.khaznadar@orange.fr georges.khaznadar@orange.fr >
Thank you for the bug report, Peter. However, I shall not try to fix it shortly. I suspect that those errors are due to some wrong interaction between Ruby and Gnome libraries at some point, but I did not find enough information about those "critical" errors when I tried to fix them in the past. Those errors did not entail misbehaviors of the application so far (as I could check individually), and most users will not even notice them when they launch screenruler from a graphic menu. Best regards,            Georges. Peter Mueller a écrit : > reopen 1000230 > found 1000230 1.0-2 > thanks > -- > 1.0-2 works now.  Thanks a lot!!!  However, some error messages emerge. > 1. Starting screenruler and switching four times with Alt-Tab between the screen ruler and the xterm or gnome-terminal from where the screenruler was started, I see the following in the console : > screenruler & [1] 11847 $ Loading libraries... Creating windows... Reading settings... Presenting ruler... Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:133 > (Switching ones to thrice causes no messages, probably due to buffering, though I can't really prove that.) More switching leads to this on the console: > Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:288 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/share/screenruler/ruler_window.rb:275 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:600 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/2.7.0/delegate.rb:343 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674 Gdk-CRITICAL **: gdk_pixbuf_get_from_surface: assertion 'surface != NULL' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:674 > After that, I was unable to get genuinely newer messages, only the copies of the above, in some order in blocks of 4. > 2. A second-mouse-button click on the screenruler to call its menu does call the menu but prints the following to the console : > Gdk-Message: 14:19:12.255: Window 0x558616afc850 is a temporary window without parent, application will not be able to position it on screen. Gdk-CRITICAL **: gdk_wayland_window_handle_configure_popup: assertion 'impl->transient_for' failed from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:598:in `invoke' from /usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb:103:in `block in define_singleton_method' from ./screenruler.rb:91:in `<main>' > Since the errors are marked as CRITICAL, I presume that something wrong goes there. > Thanks in advance for looking into it, > Peter -- Georges KHAZNADAR et Jocelyne FOURNIER 22 rue des mouettes, 59240 Dunkerque France. Téléphone +33 (0)3 28 29 17 70