VERSION INFO: ffmpegthumbs: 21.08.2 Operating System: Manjaro Linux KDE Plasma Version: 5.22.5 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.2 Kernel Version: 5.14.10-1-MANJARO (64-bit) Graphics Platform: X11 Processors: 8 × 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz Memory: 15.4 GiB of RAM Graphics Processor: Mesa Intel Xe Graphics --- All scenarios assume CIFS network share, SMB protocol version 3; mounted either via manual mount, fstab, systemd unit, or Smb4K. The following scenarios are *very likely* to make Dolphin "hang": * Prerequisite: ffmpegthumbs is installed * Prerequisite: Previews are enabled in Dolphin (video previews are enabled) 1. With Dolphin, browse to a CIFS network share 1a. Right-click a video file -> Properties Result: Dolphin hangs for several seconds or more (unresponsive) 2. In Dolphin Browse to CIFS network share 2a. Enable the "Details" pane 2b. Click on a video file Result: Dolphin hangs for several seconds or more (unresponsive) --- The following scenarios will *NOT* make Dolphin hang: 3. Repeat any of the above, however, use a LOCAL folder (rather than a network share) 4. Repeat any of the above, however, use a READ-ONLY mounted network share ("ro") 5. Repeat any of the above, however DISABLE "Video File" previews (or uninstall ffmpegthumbs) --- FURTHER NOTES: This isn't 100% a consistent hang. Sometimes it will "just work", but I noticed the majority of the time it hangs Dolphin. Scenario #4 above is very peculiar. For some reason using the "ro" (read-only) mount option on the CIFS network share alleviates the problem entirely! In all the above scenarios, video thumbnails generate properly. The hang only occurs when trying to view the file's properties (either via right-click -> Properties, or by enabling the Details pane and clicking on the file.) --- I am going to prepare a video capture to show exactly what happens. Any more information needed? Let me know what would be most useful.
Upon further experimenting, it appears the problem is mostly consistent with my Intel Iris Xe GPU (specs in first post.) With my other computer using proprietary Nvidia drivers (GeForce 1650) it doesn't seem to have this issue. --- I notice that I cannot even play the mini video preview in Dolphin with my Intel GPU system (even on local files.) However, I can play them just fine with my Nvidia GPU, even on network shares. (There's a small 1-2 second delay, but it works.) --- I mention this because it might be inter-related with the GPU / ffmpegthumbs / Dolphin / CIFS.
This continues to happen with an updated system: Operating System: Manjaro Linux KDE Plasma Version: 5.23.5 KDE Frameworks Version: 5.90.0 Qt Version: 5.15.2 Kernel Version: 5.16.5-1-MANJARO (64-bit) Graphics Platform: X11 Processors: 8 × 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz Memory: 15.4 GiB of RAM Graphics Processor: Mesa Intel® Xe Graphics The issue is as described in the bug report. :(
UPDATE: Removing the package "ffmpegthumbs" fixes the issue, but I don't consider this "resolved", since it means I lose out on video thumbnail previews in Dolphin. This is why I believe the underlying cause has to do with ffmpegthumbs + network folder.
dolphin 22.04.3-1 dolphin-plugins 22.04.3-1 ffmpegthumbs 22.04.3-1 Distro: Manjaro (Arch based) Same issue here. I have FreeBSD running ZFS on slow SMR HDD drives (broken by design) which causes very long syncing and write/read issues. The entire Samba share becomes unmountable when thumbnailer hangs and kill -9 dolphin and plugin process(es) just hangs forever. You have to boot the entire machine every time to fix the issue. The way to fix this would be to add timeout and/or retry to the thumbnailer or to the entire Dolphin preview plugin system which calls the preview plugins. Adding caching to the thumbs to ~/.cache or something could also help somewhat to decrease read count, but it would not fix the issue.
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