Sometimes files and folders are not shown

Hello, I have sometime this problem too, and I already have the same problem with videos... So I think it's a nautilus bug. :(

I found more informations on this problem upstream :
https://bugzilla.gnome.org/show_bug.cgi?id=599475

And also :
https://bugzilla.gnome.org/show_bug.cgi?id=600828
https://bugzilla.gnome.org/show_bug.cgi?id=600029

The bug is also reported on launchpad :
https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/463234

Same problem with v0.8.1

I don't sure that this problem is caused by nautilus.
I have activated Cover Thumbnailer with my music folders.
In some folders, containing a "folder.jpg" image file, CoverThumbnailer shows the CD image but no with the cover image. See screenshot attached. And though I close and reopen nautilus, it still doesn't work. I have to close nautilus completely, with "nautilus -q", so it shows me the cover properly.
I wrote a script (in bash) so that my folders of movies showing the cover, and it works well. I use the next command:
                        gvfs-set-attribute "<folder>" metadata::custom-icon <image>

By this reason, I think that the problem isn't in nautilus.

@Simon,
Your bug is not the same, you have problems with the generation of thumbnails. This bug describe a problem linked to nautilus that sometime does not show some file in the folder. (see bug https://bugzilla.gnome.org/show_bug.cgi?id=599475)

Please open another bug for your problem :)

I believe this is happening on my system as well. I can recreate the bug by doing the following:

1. Create a new file or folder, or modify an existing file or folder.
2. Navigate up one folder and the icon for the folder you were just in will not be present. The cursor shows the spinning pinwheel as well as the bottom right corner of Nautilus showing the red wheel and "Loading", which will continue indefinitely or until you refresh or navigate away and back to the folder.
3. After refresh or navigation, the child folder where the file/folder was created or modified no longer uses a CoverThumbnailer generated thumbnail and instead shows the default Nautilus folder icon.
4. Clearing thumbnail cache in the CoverThumbnailer GUI will make it regenerate all thumbnails so it fixes the ones that quit working after the bug occurs.

I'm running CoverThumbnailer v0.8.3 on Linux Mint 13 Cinnamon 64Bit, Kernel 3.2.0-23, GNOME 3.4.2, Nautilus 3.4.2.

Perhaps the script could be updated to delete the thumbnail cache for that one folder whenever a file/folder contained in it is modified/deleted.

Hello,

Cover Thumbnailer can't know that there is a problem, C-T is _outside_ of Nautilus. That's definitively a bug in Nautilus.

That's how thumbnailers (not only C-T) work with Nautilus:

  * Nautilus calls the thumbnailer (with a command like "cover-thumbnailer /path/to/folder /tmp/filename.png").
  * The thumbnailer does its job and generates a thumblnail in /tmp.
  * Then Nautilus checks the thumbnail and move it in the cache (~/.thumbnails).

There is two way for fixing this bug:

  * The good way is to fix the problem in Nautilus... The bug is already reported on its tracker, but nobody fixes it...
  * The dirty way is to get around the GNOME Thumbnnail Factory. So that mean we must develop a Nautilus extension instead of a standard thumbnailer. But the extension API of Nautilus is very poor... That mean we will need to use some dirty hacks for getting it work. That's not a good solution... Especially as Nautilus is currently changing a lot, maybe its extension system will disappear (rumors) or change radically in next versions...

That's the current situation with Nautilus thumbnailers/extensions... :)

Hello.

I have this problem, and I think it is due to m4a (or mp4) files.