https://bugs.kde.org/show_bug.cgi?id=457532
Bug ID: 457532
Summary: Stop generating thumbnails for broken/incomplete
files.
Product: kio-extras
Version: 22.04.3
Platform: openSUSE RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Thumbnails and previews
Assignee: plasma-b...@kde.org
Reporter: lemuelsimo...@protonmail.com
Target Milestone: ---
SUMMARY
Currently, the generator will endlessly attempt to make thumbnails for pictures
or videos that are corrupted or currently downloading. Downloading a video and
looking at the file (while downloading) in Dolphin skyrockets CPU usage and
abuses I/O bandwidth, making HDD users' system practically unusable unless they
exit the program (Dolphin, File Picker,etc). Can a timeout be implemented as a
safeguard?
STEPS TO REPRODUCE
1. Open Dolphin or File Picker with thumbnails enabled.
2. Go to a directory with images/videos.
3. Find at least one broken image.
OBSERVED RESULT
If there is at least one broken image, the thumbnailer will abuse the CPU and
Disk I/O, freezing the computer indefinitely.
EXPECTED RESULT
In the event of a broken image, try loading a preview for a set amount of time
(5~10 seconds?) before displaying a 'broken image' placeholder and cancelling
the operation.
SOFTWARE/OS VERSIONS
Operating System: openSUSE Leap 15.4
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.5
Kernel Version: 5.14.21-150400.24.11-default (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-3320M CPU @ 2.60GHz
Memory: 7.6 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4000
Manufacturer: LENOVO
Product Name: 2347G2U
System Version: ThinkPad T430
ADDITIONAL INFORMATION
One could argue that the proposed behavior would be bad for slower media (SMB,
Optical Media, etc), but I'm thinking that the logic can be applied
specifically to images that 'fail' to be parsed/loaded correctly (if that is
even possible).
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