[dolphin] [Bug 470990] New: Dolphin information panel not displaying preview properly

[Paul Guillaume]

https://bugs.kde.org/show_bug.cgi?id=470990

            Bug ID: 470990
           Summary: Dolphin information panel not displaying preview
                    properly
    Classification: Applications
           Product: dolphin
           Version: 21.12.3
          Platform: Kubuntu
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: panels: information
          Assignee: dolphin-bugs-null at kde.org
          Reporter: paul at imc.lc
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 159640
  --> https://bugs.kde.org/attachment.cgi?id=159640&action=edit
Shows the Dolphin window with preview of a pdf document

SUMMARY
Since upgrading to Kubuntu 22.04, I have previews in the Dolphin information
panel like I used to, but the image resolution is poor. I used to be able to
read the contents of a pdf file preview, so I did not have to open the file,
which was great when searching several documents. This is no longer possible.
The preview image is smaller than before and it looks like there is no way to
increase the size. Photos shot in high resolution display clearly, so it seems
like this is a problem with displaying text in a pdf or plain text file.  I'm
attaching a screenshot which hopefully should illustrate the problem. I'm not
sure how to attach a second screenshot, but I also have one showing the same
Dolphin window, showing preview display of a photo, which fills more of the
information pane with a clear preview. Please let me know if there is any
information I can share that will help solve the problem.

STEPS TO REPRODUCE
Select a pdf or text file in the dolphin window.

OBSERVED RESULT
The information panel does not use all of the space available to display a
preview, and the image resolution in the panel is low, so text is not easy to
read

EXPECTED RESULT
Previously I was able to read text in the preview of a pdf file, which made it
easy to choose the correct file from a folder by viewing the preview instead of
opening the file to check it's contents.

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 22.04
KDE Plasma Version: 5.24.7
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.15.0-73-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-1065G7 CPU @ 1.30GHz
Memory: 23.1 GiB of RAM
Graphics Processor: Mesa Intel® Iris® Plus Graphics

ADDITIONAL INFORMATION

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