I have Ubuntu X64 running and I have installed dolphin and packages like kffmpegthumbnailer, mplayerthumbs, ffmpegthumbs mainly found here. Even after that I cannot see thumbnails. Any idea what's wrong. Check the screenshot below :
Thank you.
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Do you have the kio-extras installed ? – user26687 Aug 18 '16 at 18:37
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Yes.. that's the last thing i did.. i finally installed kubuntu-desktop.. when i login from kde..i see thumbnails...but in unity login..i dont.. – We are Borg Aug 18 '16 at 18:44
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I had exactly the same issue. I used
sudo apt-get install kio-extras
and now it works well. You might need to go to
Settings>Configure Dolphin...>General>Previews
and then select whatever you need. Then of course press the "Previews" button if you haven't or go to View>Previews, but at least images should be by default. I also read that for some other formats (that I'm not using, so I haven't tested it) you should try
sudo apt-get install ffmpegthumbs
sudo apt-get install mplayerthumbs
sudo apt-get install kffmpegthumbnailer
I hope it works for you too!
Pedro Bahamondes Walters
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i'm reviving this old thread because the title describes exactly my case. After updating Kubuntu from 21.10 to 22.04, I had the problem "Dolphin not showing preview of images or any files". Some times it just worked. Some times, if I reloaded [F5] the directory, I was able to see the thumbnail of the file I had selected before. But mostly, no previews.
What worked for me, was to delete/rename the /home/USER/.cache and restart Dolphin. Hope someone finds this useful :=)
EDIT: This problem keeps coming back. While dolphin is recreating the cache (i'm viewing a folder of 500 files and 20 subfolders) at some time throughs this on konsole:
libpng warning: known incorrect sRGB profile
libpng warning: profile matches sRGB but writing iCCP instead
After this, I have to re-delete the cache folder and restart.
EDIT2: Ok, I'm narrowing down a little. If I select a file, lets say a .jpg or a .txt, and scroll a little up or down, viola! the thumbnail gets refreshed and appears! At the same time on konsole:
Qt: Session management error: networkIdsList argument is NULL
jimmyz
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Same problem here. In Configure/Previews, there's the peculiar question "Skip previews for remote files above", where the choices are "no previews" and various sizes. I don't know how to answer that if I simply want all previews. In any event, I can only preview jpegs one at a time by clicking on them. – Paul A. Oct 27 '22 at 22:39