I don't had the problem with an old install from: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20161106) so I'm trying to give some more info.
I started with: Ubuntu installed from: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20161106) NEVER updated: corrado@corrado-z-nov16:~$ uname -a Linux corrado-z-nov16 4.10.0-8-generic #10-Ubuntu SMP Mon Feb 13 14:04:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux corrado@corrado-z-nov16:~$ attached: BeforeUpdates: log .cache .config .local inxi screenshot thumbnails where created ok - see screenshot Then I Run apt-get update + upgrade attached: After1stUpdate: installer Pictures .cache .config .gconf .local varous logs thumbnails created wrong. see last 2 thumbnails I restarted, but ubuntu started in low graphic mode. Restarted in emergency mode. Run update + upgrade + dist-upgrade. attached: 2ndUpgrade: varoius logs. Restart again. now all seems ok BUT thumbnails are wrong. attached: AfterLastUpgrade: a lot of data. thumbnails wrong for .jpg and .png. Good thumbnail for .tiff I still have a copy of the old iso: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20161106) so I may reistall it and produce more doc. Let my know if You need. bye ** Attachment added: "Some doc about this problem. Hoping to help" https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1665602/+attachment/4826555/+files/thumbs.tar.gz -- 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/1665602 Title: nautilus no thumbnails for .jpg and .png To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1665602/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs