{"slug": "after-latest-april-2026-update-to-ubuntu-24-04-lts-thumbnails-are-no-longer", "title": "After latest April 2026 update to Ubuntu 24.04 LTS, thumbnails are no longer being generated", "summary": "Following the April 2026 update to Ubuntu 24.04 LTS, file thumbnails stopped being generated. The issue can be resolved by relaxing a security restriction, clearing the failed thumbnail cache, and restarting the file manager.", "body_md": "Steps to fix it:\nRelax the security restriction (immediate fix): Open your terminal and run:\nsudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0\nClear the \"failed\" thumbnail cache: This forces Nautilus to retry generating thumbnails for files that previously failed:\nrm -rf ~/.cache/thumbnails/fail/*\nRestart the file manager: Close all Nautilus instances to apply the changes:\nnautilus -q\nSingle Line Command:\nsudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0 && rm -rf ~/.cache/thumbnails/fail/* && nautilus -q", "url": "https://wpnews.pro/news/after-latest-april-2026-update-to-ubuntu-24-04-lts-thumbnails-are-no-longer", "canonical_source": "https://gist.github.com/andrewpayne68/1be45afa51977d5a91d51c69eafb9764", "published_at": "2026-04-24 11:00:59+00:00", "updated_at": "2026-05-22 23:36:29.644662+00:00", "lang": "en", "topics": ["open-source", "developer-tools", "enterprise-software"], "entities": ["Ubuntu", "Nautilus", "AppArmor"], "alternates": {"html": "https://wpnews.pro/news/after-latest-april-2026-update-to-ubuntu-24-04-lts-thumbnails-are-no-longer", "markdown": "https://wpnews.pro/news/after-latest-april-2026-update-to-ubuntu-24-04-lts-thumbnails-are-no-longer.md", "text": "https://wpnews.pro/news/after-latest-april-2026-update-to-ubuntu-24-04-lts-thumbnails-are-no-longer.txt", "jsonld": "https://wpnews.pro/news/after-latest-april-2026-update-to-ubuntu-24-04-lts-thumbnails-are-no-longer.jsonld"}}