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Groups > linux.debian.user > #222220 > unrolled thread

Custom application icon do not appear in Gnome and LXQT

Started byYvan Masson <yvan@masson-informatique.fr>
First post2020-05-04 10:50 +0200
Last post2020-05-04 22:30 +0200
Articles 15 — 3 participants

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  Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-04 10:50 +0200
    Re: Custom application icon do not appear in Gnome and LXQT didier gaumet <didier.gaumet@gmail.com> - 2020-05-04 15:40 +0200
      Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-04 16:40 +0200
        Re: Custom application icon do not appear in Gnome and LXQT Liam O'Toole <liam.p.otoole@gmail.com> - 2020-05-04 17:10 +0200
          Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-04 21:30 +0200
            Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-04 22:30 +0200
              Re: Custom application icon do not appear in Gnome and LXQT Liam O'Toole <liam.p.otoole@gmail.com> - 2020-05-04 23:00 +0200
                Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-04 23:10 +0200
                  Re: Custom application icon do not appear in Gnome and LXQT Liam O'Toole <liam.p.otoole@gmail.com> - 2020-05-05 12:50 +0200
                    Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-05 16:00 +0200
                      Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-05 16:50 +0200
                        Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-05 17:10 +0200
                          Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-05 21:00 +0200
                            Re: Custom application icon do not appear in Gnome and LXQT Yvan Masson <yvan@masson-informatique.fr> - 2020-05-06 15:00 +0200
            Re: Custom application icon do not appear in Gnome and LXQT Liam O'Toole <liam.p.otoole@gmail.com> - 2020-05-04 22:30 +0200

#222220 — Custom application icon do not appear in Gnome and LXQT

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-04 10:50 +0200
SubjectCustom application icon do not appear in Gnome and LXQT
Message-ID<A2EXw-Ve-9@gated-at.bofh.it>
Hi,

I made a small graphical app with Python/GTK. When installing it 
(manually or via pip3), it properly appears in the software list.

However, after starting the app, Gnome does not show my icon but a 
default one, indicating it is missing or invalid. I installed LXQT to 
compare, and result is identical (no icon at all after application 
started). Tests were done on my laptop running Debian testing.

I ran `gtk-update-icon-cache` in the proper directory to create an icon 
theme cache, but it does not help.

This issue is driving me crazy :-)

Code is on https://framagit.org/Yvan-Masson/LibreTrombi
Icons are in directory `LibreTrombi/data/icons/hicolor`

Any idea would be greatly welcome!

Regards,
Yvan

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#222230

Fromdidier gaumet <didier.gaumet@gmail.com>
Date2020-05-04 15:40 +0200
Message-ID<A2Ju9-3M2-7@gated-at.bofh.it>
In reply to#222220
my apologies to Yvan, I replied to him by e-mail (clicked too hastily)

I am not knowledgeable at all about this subject but perhaps you will
find some hints there?
 https://freedesktop.org/wiki/Howto_desktop_files/

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#222231

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-04 16:40 +0200
Message-ID<A2Kqd-4jZ-9@gated-at.bofh.it>
In reply to#222230
No problem Didier, I appreciate all answers, even not on the list :-)

I had not read the Freedesktop wiki before, but unfortunately it does 
not help: I thought the solution was here when it says icon "has to have 
the same name as the executable", but tried it without luck (and many 
well-know programs do not conform to this statement, see simple-scan for 
example).

I just read again the "icon naming spec" and "desktop-entry-spec" but I 
still fail to find the the cause of this issue.

Any other idea, even eccentric, is welcome!

Le 04/05/2020 à 15:37, didier gaumet a écrit :
> my apologies to Yvan, I replied to him by e-mail (clicked too hastily)
> 
> I am not knowledgeable at all about this subject but perhaps you will
> find some hints there?
>   https://freedesktop.org/wiki/Howto_desktop_files/
>

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#222232

FromLiam O'Toole <liam.p.otoole@gmail.com>
Date2020-05-04 17:10 +0200
Message-ID<A2KTf-4J1-1@gated-at.bofh.it>
In reply to#222231
On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
> No problem Didier, I appreciate all answers, even not on the list :-)
> 
> I had not read the Freedesktop wiki before, but unfortunately it does not
> help: I thought the solution was here when it says icon "has to have the
> same name as the executable", but tried it without luck (and many well-know
> programs do not conform to this statement, see simple-scan for example).
> 
> I just read again the "icon naming spec" and "desktop-entry-spec" but I
> still fail to find the the cause of this issue.
> 
> Any other idea, even eccentric, is welcome!
> 
> Le 04/05/2020 à 15:37, didier gaumet a écrit :
> > my apologies to Yvan, I replied to him by e-mail (clicked too hastily)
> > 
> > I am not knowledgeable at all about this subject but perhaps you will
> > find some hints there?
> >   https://freedesktop.org/wiki/Howto_desktop_files/
> > 

Just to clarify ... did you specify the absolute path to the icon or
not? If not, where did you install the icon file?

PS Please don't top-post.

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#222235

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-04 21:30 +0200
Message-ID<A2OWS-73k-7@gated-at.bofh.it>
In reply to#222232
Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>> No problem Didier, I appreciate all answers, even not on the list :-)
>>
>> I had not read the Freedesktop wiki before, but unfortunately it does not
>> help: I thought the solution was here when it says icon "has to have the
>> same name as the executable", but tried it without luck (and many well-know
>> programs do not conform to this statement, see simple-scan for example).
>>
>> I just read again the "icon naming spec" and "desktop-entry-spec" but I
>> still fail to find the the cause of this issue.
>>
>> Any other idea, even eccentric, is welcome!
>>
>> Le 04/05/2020 à 15:37, didier gaumet a écrit :
>>> my apologies to Yvan, I replied to him by e-mail (clicked too hastily)
>>>
>>> I am not knowledgeable at all about this subject but perhaps you will
>>> find some hints there?
>>>    https://freedesktop.org/wiki/Howto_desktop_files/
>>>
> 
> Just to clarify ... did you specify the absolute path to the icon or
> not? If not, where did you install the icon file? >
> PS Please don't top-post.

I used a relative path (without file extension), and installed the icons 
(PNG of different sizes and one SVG) in /usr/local/share/icons/hicolor/. 
I also tried in /usr/share/icons/hicolor/ and 
~/.local/share/icons/hicolor/ with the same result.

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#222236

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-04 22:30 +0200
Message-ID<A2PSV-7BY-1@gated-at.bofh.it>
In reply to#222235
Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
> On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
>> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
>>> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>>>> No problem Didier, I appreciate all answers, even not on the list :-)
>>>>
>>>> I had not read the Freedesktop wiki before, but unfortunately it does not
>>>> help: I thought the solution was here when it says icon "has to have the
>>>> same name as the executable", but tried it without luck (and many well-know
>>>> programs do not conform to this statement, see simple-scan for example).
>>>>
>>>> I just read again the "icon naming spec" and "desktop-entry-spec" but I
>>>> still fail to find the the cause of this issue.
>>>>
>>>> Any other idea, even eccentric, is welcome!
>>>>
>>>> Le 04/05/2020 à 15:37, didier gaumet a écrit :
>>>>> my apologies to Yvan, I replied to him by e-mail (clicked too hastily)
>>>>>
>>>>> I am not knowledgeable at all about this subject but perhaps you will
>>>>> find some hints there?
>>>>>     https://freedesktop.org/wiki/Howto_desktop_files/
>>>>>
>>>
>>> Just to clarify ... did you specify the absolute path to the icon or
>>> not? If not, where did you install the icon file? >
>>> PS Please don't top-post.
>>
>> I used a relative path (without file extension), and installed the icons
>> (PNG of different sizes and one SVG) in /usr/local/share/icons/hicolor/. I
>> also tried in /usr/share/icons/hicolor/ and ~/.local/share/icons/hicolor/
>> with the same result.
> 
> That looks reasonable. Does your current icon theme inherit from hicolor?
> 
Sorry I do not understand your question: I only have one icon, in 
different sizes (plus one SVG in the "scalable" subdirectory). What I 
understand is that Freedesktop specification says that application 
developpers should put the icon in the hicolor directory: am I wrong or 
missing something?

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#222238

FromLiam O'Toole <liam.p.otoole@gmail.com>
Date2020-05-04 23:00 +0200
Message-ID<A2QlX-7LJ-7@gated-at.bofh.it>
In reply to#222236
On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
> Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
> > On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
> > > Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
> > > > On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
> > 
> > That looks reasonable. Does your current icon theme inherit from hicolor?
> > 
> Sorry I do not understand your question: I only have one icon, in different
> sizes (plus one SVG in the "scalable" subdirectory). What I understand is
> that Freedesktop specification says that application developpers should put
> the icon in the hicolor directory: am I wrong or missing something?

To simplify the question: what does

    gsettings get org.gnome.desktop.interface icon-theme

say?

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#222239

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-04 23:10 +0200
Message-ID<A2QvE-84j-11@gated-at.bofh.it>
In reply to#222238
Le 04/05/2020 à 22:52, Liam O'Toole a écrit :
> On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
>> Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
>>> On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
>>>> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
>>>>> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>>>
>>> That looks reasonable. Does your current icon theme inherit from hicolor?
>>>
>> Sorry I do not understand your question: I only have one icon, in different
>> sizes (plus one SVG in the "scalable" subdirectory). What I understand is
>> that Freedesktop specification says that application developpers should put
>> the icon in the hicolor directory: am I wrong or missing something?
> 
> To simplify the question: what does
> 
>      gsettings get org.gnome.desktop.interface icon-theme
> 
> say?
>
It says "Adwaita"

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#222250

FromLiam O'Toole <liam.p.otoole@gmail.com>
Date2020-05-05 12:50 +0200
Message-ID<A33jb-7gM-3@gated-at.bofh.it>
In reply to#222239
On Mon, 04 May, 2020 at 23:02:16 +0200, Yvan Masson wrote:
> Le 04/05/2020 à 22:52, Liam O'Toole a écrit :
> > On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
> > > Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
> > > > On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
> > > > > Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
> > > > > > On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
> > > > 
> > > > That looks reasonable. Does your current icon theme inherit from hicolor?
> > > > 
> > > Sorry I do not understand your question: I only have one icon, in different
> > > sizes (plus one SVG in the "scalable" subdirectory). What I understand is
> > > that Freedesktop specification says that application developpers should put
> > > the icon in the hicolor directory: am I wrong or missing something?
> > 
> > To simplify the question: what does
> > 
> >      gsettings get org.gnome.desktop.interface icon-theme
> > 
> > say?
> > 
> It says "Adwaita"
> 

OK. Try putting your icon file in one of the Adwaita directories instead
of hicolor.

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#222253

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-05 16:00 +0200
Message-ID<A36h3-Ep-1@gated-at.bofh.it>
In reply to#222250
Le 05/05/2020 à 12:42, Liam O'Toole a écrit :
> On Mon, 04 May, 2020 at 23:02:16 +0200, Yvan Masson wrote:
>> Le 04/05/2020 à 22:52, Liam O'Toole a écrit :
>>> On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
>>>> Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
>>>>> On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
>>>>>> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
>>>>>>> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>>>>>
>>>>> That looks reasonable. Does your current icon theme inherit from hicolor?
>>>>>
>>>> Sorry I do not understand your question: I only have one icon, in different
>>>> sizes (plus one SVG in the "scalable" subdirectory). What I understand is
>>>> that Freedesktop specification says that application developpers should put
>>>> the icon in the hicolor directory: am I wrong or missing something?
>>>
>>> To simplify the question: what does
>>>
>>>       gsettings get org.gnome.desktop.interface icon-theme
>>>
>>> say?
>>>
>> It says "Adwaita"
>>
> 
> OK. Try putting your icon file in one of the Adwaita directories instead
> of hicolor.
> 
Thanks for the suggestion, but no change. It seems normal because 
desktop environment must fall back to hicolor theme when the icon is not 
found is the current theme (see "Installing Application Icons" in 
https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#install_icons).

I might have a similar issue as the one discribed on 
https://github.com/solus-project/budgie-desktop/issues/821 but I still 
need to investigate.

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#222257

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-05 16:50 +0200
Message-ID<A373s-1a5-7@gated-at.bofh.it>
In reply to#222253
Le 05/05/2020 à 15:52, Yvan Masson a écrit :
> Le 05/05/2020 à 12:42, Liam O'Toole a écrit :
>> On Mon, 04 May, 2020 at 23:02:16 +0200, Yvan Masson wrote:
>>> Le 04/05/2020 à 22:52, Liam O'Toole a écrit :
>>>> On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
>>>>> Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
>>>>>> On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
>>>>>>> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
>>>>>>>> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>>>>>>
>>>>>> That looks reasonable. Does your current icon theme inherit from 
>>>>>> hicolor?
>>>>>>
>>>>> Sorry I do not understand your question: I only have one icon, in 
>>>>> different
>>>>> sizes (plus one SVG in the "scalable" subdirectory). What I 
>>>>> understand is
>>>>> that Freedesktop specification says that application developpers 
>>>>> should put
>>>>> the icon in the hicolor directory: am I wrong or missing something?
>>>>
>>>> To simplify the question: what does
>>>>
>>>>       gsettings get org.gnome.desktop.interface icon-theme
>>>>
>>>> say?
>>>>
>>> It says "Adwaita"
>>>
>>
>> OK. Try putting your icon file in one of the Adwaita directories instead
>> of hicolor.
>>
> Thanks for the suggestion, but no change. It seems normal because 
> desktop environment must fall back to hicolor theme when the icon is not 
> found is the current theme (see "Installing Application Icons" in 
> https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#install_icons). 
> 
> 
> I might have a similar issue as the one discribed on 
> https://github.com/solus-project/budgie-desktop/issues/821 but I still 
> need to investigate.
> 
OK, I found a solution: I renamed my python script in /usr/local/bin to 
"libretrombi" and it works now.

I did so many tests I forgot that I won't try to find a proper 
explanation. Thanks for your suggestions!

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#222260

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-05 17:10 +0200
Message-ID<A37mN-1w5-1@gated-at.bofh.it>
In reply to#222257
Le 05/05/2020 à 16:48, Yvan Masson a écrit :
> Le 05/05/2020 à 15:52, Yvan Masson a écrit :
>> Le 05/05/2020 à 12:42, Liam O'Toole a écrit :
>>> On Mon, 04 May, 2020 at 23:02:16 +0200, Yvan Masson wrote:
>>>> Le 04/05/2020 à 22:52, Liam O'Toole a écrit :
>>>>> On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
>>>>>> Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
>>>>>>> On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
>>>>>>>> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
>>>>>>>>> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>>>>>>>
>>>>>>> That looks reasonable. Does your current icon theme inherit from 
>>>>>>> hicolor?
>>>>>>>
>>>>>> Sorry I do not understand your question: I only have one icon, in 
>>>>>> different
>>>>>> sizes (plus one SVG in the "scalable" subdirectory). What I 
>>>>>> understand is
>>>>>> that Freedesktop specification says that application developpers 
>>>>>> should put
>>>>>> the icon in the hicolor directory: am I wrong or missing something?
>>>>>
>>>>> To simplify the question: what does
>>>>>
>>>>>       gsettings get org.gnome.desktop.interface icon-theme
>>>>>
>>>>> say?
>>>>>
>>>> It says "Adwaita"
>>>>
>>>
>>> OK. Try putting your icon file in one of the Adwaita directories instead
>>> of hicolor.
>>>
>> Thanks for the suggestion, but no change. It seems normal because 
>> desktop environment must fall back to hicolor theme when the icon is 
>> not found is the current theme (see "Installing Application Icons" in 
>> https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#install_icons). 
>>
>>
>> I might have a similar issue as the one discribed on 
>> https://github.com/solus-project/budgie-desktop/issues/821 but I still 
>> need to investigate.
>>
> OK, I found a solution: I renamed my python script in /usr/local/bin to 
> "libretrombi" and it works now.
> 
> I did so many tests I forgot that I won't try to find a proper 
> explanation. Thanks for your suggestions!
> 
Unfortunately there must be caching somewhere in LXQT, or I missed 
something, because after login in to Gnome again I could not see my icon 
anymore. And I see now that it does not work anymore in LXQT… :-(

I will have to make some new tests… I will let you know.

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#222267

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-05 21:00 +0200
Message-ID<A3aXo-3SF-7@gated-at.bofh.it>
In reply to#222260
Le 05/05/2020 à 17:06, Yvan Masson a écrit :
> Le 05/05/2020 à 16:48, Yvan Masson a écrit :
>> Le 05/05/2020 à 15:52, Yvan Masson a écrit :
>>> Le 05/05/2020 à 12:42, Liam O'Toole a écrit :
>>>> On Mon, 04 May, 2020 at 23:02:16 +0200, Yvan Masson wrote:
>>>>> Le 04/05/2020 à 22:52, Liam O'Toole a écrit :
>>>>>> On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
>>>>>>> Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
>>>>>>>> On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
>>>>>>>>> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
>>>>>>>>>> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>>>>>>>>
>>>>>>>> That looks reasonable. Does your current icon theme inherit from 
>>>>>>>> hicolor?
>>>>>>>>
>>>>>>> Sorry I do not understand your question: I only have one icon, in 
>>>>>>> different
>>>>>>> sizes (plus one SVG in the "scalable" subdirectory). What I 
>>>>>>> understand is
>>>>>>> that Freedesktop specification says that application developpers 
>>>>>>> should put
>>>>>>> the icon in the hicolor directory: am I wrong or missing something?
>>>>>>
>>>>>> To simplify the question: what does
>>>>>>
>>>>>>       gsettings get org.gnome.desktop.interface icon-theme
>>>>>>
>>>>>> say?
>>>>>>
>>>>> It says "Adwaita"
>>>>>
>>>>
>>>> OK. Try putting your icon file in one of the Adwaita directories 
>>>> instead
>>>> of hicolor.
>>>>
>>> Thanks for the suggestion, but no change. It seems normal because 
>>> desktop environment must fall back to hicolor theme when the icon is 
>>> not found is the current theme (see "Installing Application Icons" in 
>>> https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#install_icons). 
>>>
>>>
>>> I might have a similar issue as the one discribed on 
>>> https://github.com/solus-project/budgie-desktop/issues/821 but I 
>>> still need to investigate.
>>>
>> OK, I found a solution: I renamed my python script in /usr/local/bin 
>> to "libretrombi" and it works now.
>>
>> I did so many tests I forgot that I won't try to find a proper 
>> explanation. Thanks for your suggestions!
>>
> Unfortunately there must be caching somewhere in LXQT, or I missed 
> something, because after login in to Gnome again I could not see my icon 
> anymore. And I see now that it does not work anymore in LXQT… :-(
> 
> I will have to make some new tests… I will let you know.
> 
I am again in a working state: my desktop file is named 
"libretrombi.desktop", my icons "libretrombi.png", and my executable 
"libretrombi". This is good, but I want to distribute my software with 
Flatpak, which requires the use of an "application ID" (e.g. 
org.domain.myapp), so I will continue experiment.

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#222278

FromYvan Masson <yvan@masson-informatique.fr>
Date2020-05-06 15:00 +0200
Message-ID<A3rOy-7Aj-7@gated-at.bofh.it>
In reply to#222267
Le 05/05/2020 à 20:55, Yvan Masson a écrit :
> Le 05/05/2020 à 17:06, Yvan Masson a écrit :
>> Le 05/05/2020 à 16:48, Yvan Masson a écrit :
>>> Le 05/05/2020 à 15:52, Yvan Masson a écrit :
>>>> Le 05/05/2020 à 12:42, Liam O'Toole a écrit :
>>>>> On Mon, 04 May, 2020 at 23:02:16 +0200, Yvan Masson wrote:
>>>>>> Le 04/05/2020 à 22:52, Liam O'Toole a écrit :
>>>>>>> On Mon, 04 May, 2020 at 22:29:14 +0200, Yvan Masson wrote:
>>>>>>>> Le 04/05/2020 à 22:21, Liam O'Toole a écrit :
>>>>>>>>> On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
>>>>>>>>>> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
>>>>>>>>>>> On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
>>>>>>>>>
>>>>>>>>> That looks reasonable. Does your current icon theme inherit 
>>>>>>>>> from hicolor?
>>>>>>>>>
>>>>>>>> Sorry I do not understand your question: I only have one icon, 
>>>>>>>> in different
>>>>>>>> sizes (plus one SVG in the "scalable" subdirectory). What I 
>>>>>>>> understand is
>>>>>>>> that Freedesktop specification says that application developpers 
>>>>>>>> should put
>>>>>>>> the icon in the hicolor directory: am I wrong or missing something?
>>>>>>>
>>>>>>> To simplify the question: what does
>>>>>>>
>>>>>>>       gsettings get org.gnome.desktop.interface icon-theme
>>>>>>>
>>>>>>> say?
>>>>>>>
>>>>>> It says "Adwaita"
>>>>>>
>>>>>
>>>>> OK. Try putting your icon file in one of the Adwaita directories 
>>>>> instead
>>>>> of hicolor.
>>>>>
>>>> Thanks for the suggestion, but no change. It seems normal because 
>>>> desktop environment must fall back to hicolor theme when the icon is 
>>>> not found is the current theme (see "Installing Application Icons" 
>>>> in 
>>>> https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#install_icons). 
>>>>
>>>>
>>>> I might have a similar issue as the one discribed on 
>>>> https://github.com/solus-project/budgie-desktop/issues/821 but I 
>>>> still need to investigate.
>>>>
>>> OK, I found a solution: I renamed my python script in /usr/local/bin 
>>> to "libretrombi" and it works now.
>>>
>>> I did so many tests I forgot that I won't try to find a proper 
>>> explanation. Thanks for your suggestions!
>>>
>> Unfortunately there must be caching somewhere in LXQT, or I missed 
>> something, because after login in to Gnome again I could not see my 
>> icon anymore. And I see now that it does not work anymore in LXQT… :-(
>>
>> I will have to make some new tests… I will let you know.
>>
> I am again in a working state: my desktop file is named 
> "libretrombi.desktop", my icons "libretrombi.png", and my executable 
> "libretrombi". This is good, but I want to distribute my software with 
> Flatpak, which requires the use of an "application ID" (e.g. 
> org.domain.myapp), so I will continue experiment.
> 
After more experiments, still on my personal laptop, I can say that when 
my desktop file is named with an application ID (e.g. 
com.example.myapp.desktop), it works only in LXQT but not in Gnome. Very 
strange, as it works for other programs (e.g. org.gnome.Evolution.desktop).

Computer mysteries…

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#222237

FromLiam O'Toole <liam.p.otoole@gmail.com>
Date2020-05-04 22:30 +0200
Message-ID<A2PSV-7BY-3@gated-at.bofh.it>
In reply to#222235
On Mon, 04 May, 2020 at 21:22:20 +0200, Yvan Masson wrote:
> Le 04/05/2020 à 17:06, Liam O'Toole a écrit :
> > On Mon, 04 May, 2020 at 16:28:30 +0200, Yvan Masson wrote:
> > > No problem Didier, I appreciate all answers, even not on the list :-)
> > > 
> > > I had not read the Freedesktop wiki before, but unfortunately it does not
> > > help: I thought the solution was here when it says icon "has to have the
> > > same name as the executable", but tried it without luck (and many well-know
> > > programs do not conform to this statement, see simple-scan for example).
> > > 
> > > I just read again the "icon naming spec" and "desktop-entry-spec" but I
> > > still fail to find the the cause of this issue.
> > > 
> > > Any other idea, even eccentric, is welcome!
> > > 
> > > Le 04/05/2020 à 15:37, didier gaumet a écrit :
> > > > my apologies to Yvan, I replied to him by e-mail (clicked too hastily)
> > > > 
> > > > I am not knowledgeable at all about this subject but perhaps you will
> > > > find some hints there?
> > > >    https://freedesktop.org/wiki/Howto_desktop_files/
> > > > 
> > 
> > Just to clarify ... did you specify the absolute path to the icon or
> > not? If not, where did you install the icon file? >
> > PS Please don't top-post.
> 
> I used a relative path (without file extension), and installed the icons
> (PNG of different sizes and one SVG) in /usr/local/share/icons/hicolor/. I
> also tried in /usr/share/icons/hicolor/ and ~/.local/share/icons/hicolor/
> with the same result.

That looks reasonable. Does your current icon theme inherit from hicolor?

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