Shutter sometimes captures desktop instead of screen

NoodlesEater commented 5 months ago

Hello Shutter Team,

I take a few hundred full-screen screenshots per day as part of my workflow. Shutter sometimes captures a view of the desktop instead of the actual thing on the screen at the time. This means I have to check the destination folder after every screenshot if I want to be sure it was actually taken.

The frequency of 'bad captures' is about 1-in-20 to 1-in-30, it's hard to say. Sometimes I get two or three in a row. Rarely (maybe 1-in-50 bad captures), it will capture the File Manager instead of the thing on the screen or the desktop.

I mainly use Shutter to take screenshots in Firefox and Gedit, but it doesn't seem to matter what program is 'on top'.

Steps to reproduce the issue:

(Note: intermittent problem. Problem was occurring using 'shutter -f -o [full path]', before I wrote the below script.)
Pressing PrntScrn executes the command: sh /home/[my name]/Pictures/screenshot.sh
"screenshot.sh" simply puts the screenshots in a folder for the present date:
!/bin/bash

parentpath="./Pictures/Screenshots/"$(date +"%y%m%d")"/" filename=$(date +"%y%m%d-%H%M%S")".jpg" mkdir -p "$parentpath" shutter -f -o "$parentpath$filename"
Viewing the destination folder shows a screenshot was taken of the desktop, instead of the program 'on top'.

Error output: none.

Versions:

Shutter 0.99.2 Rev.1593
Linux Mint 21.2

Possible workaround:

Feature request: if this can't be fixed, then it would at least be useful to display a thumbnail of the screenshot that has just been taken, so it can be validated at a glance, and a replacement taken if needed. This would also be useful when taking screenshots of videos that are playing, to ensure a moment was not missed. When I was on Windows, I used ShareX, which displays every screenshot's thumbnail at the bottom right for a user-set duration and thumbnail size.

I had expected this issue to be raised by others. It seems it hasn't been, for the last 2 months or so, so I am attempting to raise it myself. Since the issue slows down my workflow, I would sincerely appreciate any attention that can be given to it, at the convenience of the maintenance team, of course.

Kind regards,

NoodlesEater

NoodlesEater commented 5 months ago

Erratum: there is actually some error output when run in the terminal, rather than via Keyboard Shortcuts.

Command: shutter -f -o "/home/[my name]/Pictures/Screenshots/sadasfeg.jpg"

Error output:

Subroutine Pango::Layout::set_text redefined at /usr/share/perl5/Gtk3.pm line 2299.
    require Gtk3.pm called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/share/perl5/Gtk3.pm line 2299
    eval {...} called at /usr/share/perl5/Gtk3.pm line 2299
Subroutine Pango::Layout::set_markup redefined at /usr/share/perl5/Gtk3.pm line 2305.
    require Gtk3.pm called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/share/perl5/Gtk3.pm line 2305
    eval {...} called at /usr/share/perl5/Gtk3.pm line 2305
GLib-GObject-CRITICAL **: g_boxed_type_register_static: assertion 'g_type_from_name (name) == 0' failed at /usr/lib/x86_64-linux-gnu/perl5/5.34/Glib/Object/Introspection.pm line 110.
 at /usr/share/perl5/Gtk3.pm line 489.
    Gtk3::import("Gtk3", "-init") called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/bin/shutter line 72
    eval {...} called at /usr/bin/shutter line 72
GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed at /usr/lib/x86_64-linux-gnu/perl5/5.34/Glib/Object/Introspection.pm line 110.
 at /usr/share/perl5/Gtk3.pm line 489.
    Gtk3::import("Gtk3", "-init") called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/bin/shutter line 72
    eval {...} called at /usr/bin/shutter line 72
GLib-GObject-CRITICAL **: g_boxed_type_register_static: assertion 'g_type_from_name (name) == 0' failed at /usr/lib/x86_64-linux-gnu/perl5/5.34/Glib/Object/Introspection.pm line 110.
 at /usr/share/perl5/Gtk3.pm line 489.
    Gtk3::import("Gtk3", "-init") called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/bin/shutter line 72
    eval {...} called at /usr/bin/shutter line 72
GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed at /usr/lib/x86_64-linux-gnu/perl5/5.34/Glib/Object/Introspection.pm line 110.
 at /usr/share/perl5/Gtk3.pm line 489.
    Gtk3::import("Gtk3", "-init") called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/bin/shutter line 72
    eval {...} called at /usr/bin/shutter line 72
GLib-GObject-CRITICAL **: g_boxed_type_register_static: assertion 'g_type_from_name (name) == 0' failed at /usr/lib/x86_64-linux-gnu/perl5/5.34/Glib/Object/Introspection.pm line 110.
 at /usr/share/perl5/Gtk3.pm line 489.
    Gtk3::import("Gtk3", "-init") called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/bin/shutter line 72
    eval {...} called at /usr/bin/shutter line 72
GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed at /usr/lib/x86_64-linux-gnu/perl5/5.34/Glib/Object/Introspection.pm line 110.
 at /usr/share/perl5/Gtk3.pm line 489.
    Gtk3::import("Gtk3", "-init") called at /usr/bin/shutter line 72
    Shutter::App::BEGIN() called at /usr/bin/shutter line 72
    eval {...} called at /usr/bin/shutter line 72
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Variable "%session_start_screen" will not stay shared at /usr/bin/shutter line 3971.
Variable "%session_screens" will not stay shared at /usr/bin/shutter line 4004.
Variable "$notebook" will not stay shared at /usr/bin/shutter line 4034.
Variable "%session_screens" will not stay shared at /usr/bin/shutter line 4075.
Variable "$sd" will not stay shared at /usr/bin/shutter line 4122.
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Variable "%session_start_screen" will not stay shared at /usr/bin/shutter line 4377.
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Variable "$save_ask_active" will not stay shared at /usr/bin/shutter line 4486.
Variable "$save_no_active" will not stay shared at /usr/bin/shutter line 4487.
Variable "$image_autocopy_active" will not stay shared at /usr/bin/shutter line 4488.
Variable "$fname_autocopy_active" will not stay shared at /usr/bin/shutter line 4489.
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Name "Gtk3::Gdk::SELECTION_CLIPBOARD" used only once: possible typo at /usr/bin/shutter line 291.
WARNING: gnome-web-photo is missing --> screenshots of websites will be disabled!

 at /usr/bin/shutter line 9038.
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INFO: There is already another instance of Shutter running!

Photon89 commented 5 months ago

The output isn't indicating any problem, Shutter is just quite verbose but there are no real errors there.

Are you using an Intel video chip by chance?

DarthGandalf commented 5 months ago

INFO: There is already another instance of Shutter running!

Show instead logs of the instance in which you're trying to do the capture. Which was running.

When that instance is running with logs outputted to some file, then run the script and see what logs happened there.

NoodlesEater commented 5 months ago

The output isn't indicating any problem, Shutter is just quite verbose but there are no real errors there.

Are you using an Intel video chip by chance?

Thank you for responding. I have found the command inxi -G, which gives the following output. There is an Intel device listed, but I believe it is onboard graphics, which I am not using. My monitor is plugged into the NVIDIA graphics card.

  Device-1: Intel driver: i915 v: kernel
  Device-2: NVIDIA driver: nvidia v: 535.154.05
  Display: x11 server: X.Org v: 1.21.1.4 driver: X:
    loaded: modesetting,nvidia unloaded: fbdev,nouveau,vesa gpu: i915,nvidia
    resolution: 3840x2160~60Hz
  OpenGL: renderer: NVIDIA GeForce RTX 4060 Ti/PCIe/SSE2
    v: 4.6.0 NVIDIA 535.154.05

If there is a more suitable command for this, I would be happy to use it.

NoodlesEater commented 5 months ago

INFO: There is already another instance of Shutter running!

Show instead logs of the instance in which you're trying to do the capture. Which was running.

When that instance is running with logs outputted to some file, then run the script and see what logs happened there.

I'm not completely sure that this is what was asked, but I have closed all instances of Shutter, and then used the command shutter > logfile.txt. This opened a new instance, which appears to add 15 or so lines to the log file, every time I run the script as described. I plan to use this instance until the intermittent problem appears, and then I will post the output for that capture.

NoodlesEater commented 5 months ago

I don't know why, but the problem appears to be resolved. Over the last week (since I opened this thread), it declined to once per day (maybe 1-in-300 screenshots). It has failed to appear entirely for the last 3 days (since my last post).

I thank both of you for your time and attention. I will 'Close as not planned', due to 'can't repro'.

Kind regards,

NoodlesEater

Photon89 commented 4 months ago

I assume that this is related to the video driver in use. Not much we could do about on our and anyway, unfortunately...

But glad that there is some improvement!

NoodlesEater commented 4 months ago

Hello all,

Unfortunately, the issue returned yesterday. I have log file excerpts.

Logfile excerpt 1.txt Logfile excerpt 2.txt Logfile excerpt 3.txt Logfile excerpt 4.txt Logfile excerpt 5.txt

File 5 is probably the most useful because it includes terminal output from after I restarted my computer, after installing all outstanding updates.

Video driver:

nvidia-driver-535 (recommended)
Version 535.154.05 -0ubuntu0.22.04.01
NVIDIA driver metapackage

Any help would be much appreciated. I don't really have an alternative to Shutter at this point.

Kind regards,

NoodlesEater

Photon89 commented 4 months ago

I would propose to use a different screenshot tool for a while and try to catch this problem with it. It doesn't look like a Shutter specific problem to me... Unfortunately, I don't see anything related to the issue in question in the logs.

NoodlesEater commented 4 months ago

I would propose to use a different screenshot tool for a while and try to catch this problem with it. It doesn't look like a Shutter specific problem to me... Unfortunately, I don't see anything related to the issue in question in the logs.

Thank you very much for taking the time to look.

I have been researching alternate tools, and whether other people have had similar problems. I have found a troubleshooting page1 for Simplescreenrecorder which indicates the problem is the Cinnamon window manager.

"The recording occasionally flickers, showing parts of the desktop background instead of windows This is a known problem with some window managers, especially those based on Mutter (the GNOME 3 window manager) and Cinnamon, though other compositing window managers (e.g. Compiz) can also be affected by this. Since this is a window manager flaw, other recording software is affected by this too. "

Since this is apparently not fixable, and may be a 'silent problem' affecting many people's window managers, is it possible to request that Shutter include an option to 'show thumbnail after capture'?

This would show whether a screenshot was taken successfully, or needs to be re-taken.

Photon89 commented 4 months ago

Usually, after capture, Shutter shows its main window with a full size preview of the screenshot. Isn't that the case for you?

You can enable this in the settings ("Behavior > Window Preferences > Present main window after taking a screenshot").

NoodlesEater commented 4 months ago

I had disabled that behaviour after installation, because the full-size preview would obscure what I was working on, and required action to close it.

I have now tried reducing the window size and playing around with the settings. I have found that:

When 'Autohide main window' is on, it works as desired. Upon taking a screenshot, the window pops up in the place I left it, i.e. unused screen space at bottom right.
If 'Autohide' is off, the window always pops up near the top right, no matter where I moved it before.

This isn't ideal, since the screenshot preview area is less than 20% of the window area. However, it appears to be an adequate workaround.

I migrated from ShareX on Windows, and couldn't get it working on Wine. I hope this workaround combined with the script I posted can help others in a similar position.

Photon89 commented 4 months ago

The window placement can't be controlled by Shutter itself, but depending on your window manager you can define rules for specific windows (like Shutter's window). Looks like Cinnamon can't do it: https://github.com/linuxmint/muffin/issues/121 But other DEs use WMs which can. Personally, I use Compiz as WM, which has tons of options which can be tweaked to your preference, in particular, it also offers the window rules functionality.

NoodlesEater commented 4 months ago

Thank you for your help. I have decided to stick with Cinnamon for now. Since this appears to be as 'solved' as this issue can be, I will close the thread.

shutter-project / shutter

Shutter sometimes captures desktop instead of screen #650

!/bin/bash