Bug 449066

Summary:	PDF files: first-page thumbnail is missing; only the generic pdf thumbnail is visible
Product:	[Applications] okular	Reporter:	rgreen <greenandpleasant2000-support>
Component:	general	Assignee:	Okular developers <okular-devel>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	aacid
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Mint (Ubuntu based)
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	test_file.odt and screenshot showing "before" and "after" appearance of pdfs.

Description rgreen 2022-01-24 10:53:39 UTC

SUMMARY
***
After uninstalling Xreader, I installed Okular for the first time on my system. However, now, after this date, any PDF files created by LibreOffice Write fail to show the first-page thumbnail on the pdf file.

Existing PDF files, created before the uninstall of Xreader and the install of OKULAR, are not affected.

***

STEPS TO REPRODUCE

1. Need to have OKULAR uninstalled and all dependencies, configuration files etc. removed.
2. Install Xreader.
3. In LibreOffice Writer, generate a PDF from a file with a distinctive, large image on the first page (to create an easily-visible first-page thumbnail on the pdf icon).
4. Create a pdf.

EXPECTED / OBSERVED RESULT: The PDF should have a thumbnail of the first page clearly visible on it.

5. Uninstall Xreader and install Okular.
6. Now repeat step 3, above.

OBSERVED RESULT: The first-page thumbnail does not appear; only the generic PDF thumbnail.
EXPECTED RESULT; The first-page thumbnail should be on the first page of the PDF doc.

7. Install Xreader (keep Okular) and repeat step 3.

EXPECTED / OBSERVED RESULT: The PDF should have a thumbnail of the book-cover clearly visible on it.

***
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Mint 20.1 / Cinnamon 4.8.6
KDE Plasma Version: 
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.3.

ADDITIONAL INFORMATION

Comment 1 Albert Astals Cid 2022-01-24 12:45:06 UTC

Please attach a screenshot of what you get

Comment 2 rgreen 2022-01-24 16:26:29 UTC

Created attachment 145862 [details]
test_file.odt and screenshot showing "before" and "after" appearance of pdfs.

Here's a better method for seeing the bug 2013 – at least on Linux Mint.

1. Make sure that both Okular and Xreader are installed.
2. Unzip the attached zip file.
3. Open the "test_file" in LO Writer and generate a pdf from it.
Observed / Expected result: The PDF shows a thumbnail of the "Smiley face" thumbnail (see screenshot).
4. Close LO Writer.
4. Uninstall Xreader. Okular should now be the only pdf reader on your system.
5. Shut down / restart your computer.
6. Open the test_file again and generate a pdf.

Expected result: there should be a smiley face thumbnail on the pdf file.
Actual result: There is a generic PDF thumbnail instead: see screenshot.

Comment 3 Albert Astals Cid 2022-01-24 19:07:45 UTC

Okular is not responsible for creating thumbnails for whatever file manager you are using.