https://bugs.kde.org/show_bug.cgi?id=504451
Bug ID: 504451
Summary: Most of the text in RISC-V ISA specification PDF is
invisible
Classification: Applications
Product: okular
Version First 25.04.1
Reported In:
Platform: openSUSE
URL: https://github.com/riscv/riscv-isa-manual/releases
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: PDF backend
Assignee: okular-devel@kde.org
Reporter: j...@holodeck1.com
Target Milestone: ---
Created attachment 181449
--> https://bugs.kde.org/attachment.cgi?id=181449&action=edit
Example of problematic RISC-V ISA spec PDF
SUMMARY
I downloaded the latest RISC-V ISA specification release 20250508 PDFs and most
of the text in them is not visible in Okular (version 25.04.1, Poppler
25.04.0). The text is still invisible when I change accessibility setting and
change the paper color to something that is not white. The text can can be
selected and pasted into Kate for example. The text is visible in Dolphin
information panel in preview when you hover over the document with the mouse.
It is also visible in Evince (version 48.0, same Poppler version) viewer.
STEPS TO REPRODUCE
1. open the RISC-V ISA specification release 20250508 PDF
OBSERVED RESULT
Most of the text in Okular is invisible
EXPECTED RESULT
Display all text, similar to Evince
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20250515
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel Version: 6.14.6-1-default (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7840HS w/ Radeon 780M Graphics
Memory: 30.7 GiB of RAM
Graphics Processor: AMD Radeon 780M
Manufacturer: SLIMBOOK
Product Name: EXCALIBUR-16-AMD7
System Version: 1.0
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