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 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1443809 Title: Failed thumbnail check not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-desktop/+bug/1443809/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs