Hey, @hax, @rdbende, @desikn, thanks for the quick reply despite my clearly very sour post.
You are in fact right, and the thumbnails are showing up.
Now. -.-
I've observed this behaviour before in Gnome: it takes a while and then the thumbnails are there. I have - in fact - checked the grid view and only got icons (for two images of about 500kB and 2MB, so not a size limit issue, hence my rant).
But my sourness still remains. I've been using Gnome for years and often come across those glitches that are very hard to diagnose because everything is minimalist to the point that you can't tell what's going on.
PS: There's definitely always the suspicion that Canonical somehow screwed it up of course, but I think in this case, they're not to blame.
@cweickhmann @hax @rdbende I don't know why you're talking about GNOME 46 when Ubuntu has 47. If you're using an older Ubuntu I suggest upgrading.
@cweickhmann @hax @rdbende Ah, thought they were still at 42. Well my point still stands, update to the latest Ubuntu (24.10) with GNOME 47 and your problem will be gone because the file chooser is using Nautilus.
The problem has been fixed in a new GNOME version, so it's an Ubuntu problem not a GNOME problem.
@cweickhmann @hax @rdbende Thumbnails don't appear in GTKFileChooser if they haven't already been generated by Nautilus.
This decades old bug has finally been fixed in GNOME 47 by replacing the GTKFileChooser with NautilusFileChooser.
@desikn @hax @rdbende 😂 Okay, now I get it. But I hope you understand my bad mood. It's odd that such a gap in such a central widget is around for so long. And really not what you would expect when you don't know about it. Really, I remember thumbnail issues in KDE back when it was called Kool.
Looking forward to get 47 then. Thanks for your patience with me.
@cweickhmann @hax @rdbende Judging from the screenshot that's GNOME 42, they're at 47 now. So you're 5 versions behind. Your problem has been fixed in the latest GNOME with the implementation of NautilusFileChooser.
@hax @rdbende @desikn
Look: Just when I tried this thing on my daughter's new account, it did the same thing - screenshot attached.
Most of the files shown are below 2MB, none showed a thumbnail - even after several trials.
This is the file selection dialogue invoked by gnome-control-center when changing the desktop background image.
Sure, it *may* be a Ubuntu issue, but I've never seen such erratic behaviour on my KDE setup (same Ubuntu basis). So, why?