After updating to 5.0.0 on Manjaro KDE, dolphin doesn't show previews for .kra files anymore

I’ve tried a few things that worked for me before. I haven’t figured out what’s wrong yet. I updated Krita along with a ton of other things (anything with the new manjaro update), so it might be that.

One other note, I do have the “Compress .kra files further (more loading/saving)” tick enabled in krita’s settings if that might mean anything.

The first thing I tried was making sure dolphin would show previews for everything


This didn’t fix the problem.

One thing I tried was changing the file extensions of my krita files from .kra to .png. I found something interesting that might indicate a problem. I’m not sure.
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file 1-2.png was originally a .kra file. I even opened it up in krita and just saved it again as a krita file just to make sure. When I modified the file extension to .png, the preview showed up. BUT, when I try to do the same thing to 1-1.kra, it doesn’t work. 1-1.kra was created and saved from krita 4.x.x (sorry I can’t remember the exact version, but it was one of the newest). I’m not sure why this only worked on the file created by 5.0.0.

Interestingly enough, the newest stable version of Nextcloud can display the thumbnails properly, but only if their file extensions are .kra. Nextcloud wouldn’t show a preview if they were .png’s.
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Because of this, it might not be a problem with Krita, but I’m not really sure where to start diagnosing. Every other file type seems to show previews, including .psd and .png files created by Krita, but not .kra for some reason.

I went on another computer running Manjaro, Dolphin and i3 (instead of Plasma) to see, and I could see the thumbnails for all my .kra files. I updated it with the newest Manjaro update and got the same problems.

I encountered this in fedora 35. If you open the dolphinrc in the ~/.config folder and remove the [PreviewSettings] section and restart dolphin strangely it brings back the file preview. If you enable or disable the kra thumbnail in the GUI setting it breaks.

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oh yeah that worked, looks like the dolphin update didn’t update the rc file.

No if you change anything in the GUI settings it will break again :). this may be a bug in thumbnailer or dolphin. Can you report it please?

sorry to say it here but I have the same issue in windows. installed from steam:
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the top is krita v5
bottom is krita v4 (pre v5)

I don’t know much about windows. But I think on windows there is a shell extension that enables the preview. I don’t know if steam provides it. May be we can ask @emmetpdx

looks like there’s a bug report for it already, but the one reply as of right now cannot replicate it. It’s possible it was fixed but the newest version isn’t up on certain repositories.

edit: nvm I think it’s still a problem, but I can’t login atm so I can’t respond with a more specific bug reproduction method.

Additionally dolphin also has a setting to only shows previews for files if they don’t exceed a certain size which is 3 MB by default, if I remember correctly. Since kra files often get much bigger, you probably have to increase the limit.

I have. I put a screenshot in there with my dolphin preview settings. I currently have local file previews set to “no limit” I’ve also tried using other numbers. These files are also only around 2 MB.

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