I wonder if it failed in the past and Nautilus is simply not trying again. Perhaps try deleting the thumbnail cache and see if it successfully generates it afterwards,
rm -rf ~/.cache/thumbnails -- 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/2111560 Title: Nautilus does not show embedded album art thumbnails for .m4a files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/2111560/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
