I may have misfiled this, but not quite sure which project is
responsible. I also note that when adding gnome-desktop to the list of
affected projects, it said gnome-desktop does not use Launchpad to
track bugs. Nobody will be notified about this issue.
Added a screenshot of an image not being thumbnailed.
The relevant function seems to be
gnome_desktop_thumbnail_factory_has_valid_failed_thumbnail ()
https://developer.gnome.org/gnome-desktop/stable/GnomeDesktopThumbnailFactory.html#gnome-desktop-thumbnail-factory-has-valid-failed-thumbnail
This is old code because I don't know how to reference the latest code:
http://sourcecodebrowser.com/gnome-desktop/2.32.0/gnome-desktop-thumbnail_8h.html#ab9946e6856418572e55147637a1493ab
It includes this:
pixbuf = gdk_pixbuf_new_from_file (path, NULL);
g_free (path);
if (pixbuf)
{
res = gnome_desktop_thumbnail_is_valid (pixbuf, uri, mtime);
g_object_unref (pixbuf);
}
g_checksum_free (checksum);
It mentions mtime, yet evidently that is not being checked if the
process described in this report can cause a new thumbnail to fail to be
generated.
As implied in the original report, if there is a valid thumbnail and
also a failed thumbnail for the same path to a file, if the valid
thumbnail doesn't match the mtime of the actual file, a new thumbnail
will be generated. So it seems to work unless no 'normal' thumbnail
(whether normal or large-sized) already exists.
** Attachment added: Screenshot from 2015-04-14 01:15:35.png
https://bugs.launchpad.net/gnome-desktop/+bug/1443809/+attachment/4374819/+files/Screenshot%20from%202015-04-14%2001%3A15%3A35.png
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https://bugs.launchpad.net/bugs/1443809
Title:
Failed thumbnail check not working properly
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