Ever since two minor updates of all the KDE stuff ago, Dolphin does not show any new thumbnails anymore. It creates the directories for it (.cache/thumbnails/*), but does not generate the actual files. Thumbnails are turned on in the View menu. All formats seem to be affected (images, videos via kde-apps/thumbnailers[video], etc). Old thumbnails (existing files in .cache/thumbnails/*/) however, are displayed! And .local/share/sddm/xorg-session.log shows that the thumbnailer is executed. (E.g. when deleting .cache/thumbnails during running and using Dolphin, it complains that it cannot access it anymore.) So it is not Dolphin. But the thumbnailer facility itself. With them all being affected, I doubt that it just the different specific generators, but the facility that sits between them and Dolphin. I do not see any way to run it manually or debug it. There seem to be only .so files. So at this point, I can only assume that it must be a bug. I do not know if it is only the case here, or if others can reproduce it. So I’m opening this bug, to pin down the change that caused it, by comparing it to a working case. Reproducible: Always Steps to Reproduce: 1. Make sure all instance of Dolphin or other programs that might cause thumbnail generation are closed. 2. Delete .cache/thumbnails/* 3. Open Dolphin, navigate to a directory with pictures in it, switch the view to symbols (Ctrl+1), turn on the thumbnail display (F12), and make them as big as possible (using the slider at the bottom right of the window). Actual Results: The directories .cache/thumbnails/{xx-large,x-large,large,normal} now exist. But no thumbnails are visible in Dolphin. Expected Results: The thumbnails should be generated and visible as files in .cache/thumbnails/{xx-large,x-large,large,normal}, as well as in Dolphin. $ emerge --info kio-extras thumbnailers ffmpegthumbs Portage 3.0.68 (python 3.13.3-final-0, default/linux/amd64/23.0/desktop/plasma, gcc-15, glibc-2.41-r2, 6.14.5-gentoo-dist x86_64) ================================================================= System Settings ================================================================= System uname: Linux-6.14.5-gentoo-dist-x86_64-AMD_Ryzen_3_2200G_with_Radeon_Vega_Graphics-with-glibc2.41 KiB Mem: 5977840 total, 680808 free KiB Swap: 16776188 total, 14970456 free Timestamp of repository gentoo: Sat, 17 May 2025 04:15:00 +0000 Head commit of repository gentoo: 8bfb442030be59ac486f62f1f20aa6943b2b546c Timestamp of repository guru: Fri, 16 May 2025 10:24:16 +0000 Head commit of repository guru: 7c991b877a00563a31f40c674d0f0f9bfce96434 Timestamp of repository haskell: Thu, 08 May 2025 12:57:06 +0000 Head commit of repository haskell: a63ec1c2c3d119ab3eb5c0b2b46bf67457acb677 sh bash 5.2_p37-r3 ld GNU ld (Gentoo 2.44 p1) 2.44.0 ccache version 4.11.3 [disabled] app-misc/pax-utils: 1.3.8::gentoo app-shells/bash: 5.2_p37-r3::gentoo dev-build/autoconf: 2.13-r8::gentoo, 2.72-r1::gentoo dev-build/automake: 1.17-r2::gentoo dev-build/cmake: 3.31.7-r1::gentoo dev-build/libtool: 2.5.4::gentoo dev-build/make: 4.4.1-r100::gentoo dev-build/meson: 1.8.0::gentoo dev-lang/perl: 5.40.2::gentoo dev-lang/python: 3.13.3::gentoo, 3.13.3-r100::gentoo, 3.14.0_beta1::gentoo dev-lang/rust-bin: 1.86.0-r1::gentoo, 1.87.0::gentoo dev-util/ccache: 4.11.3::gentoo llvm-core/clang: 19.1.7::gentoo, 20.1.5::gentoo llvm-core/lld: 19.1.7::gentoo llvm-core/llvm: 19.1.7::gentoo, 20.1.5::gentoo sys-apps/baselayout: 2.17::gentoo sys-apps/openrc: 0.62.2::gentoo sys-apps/sandbox: 2.46::gentoo sys-devel/binutils: 2.44::gentoo sys-devel/binutils-config: 5.5.2::gentoo sys-devel/gcc: 15.1.0::gentoo sys-devel/gcc-config: 2.12.1::gentoo sys-kernel/linux-headers: 6.14::gentoo (virtual/os-headers) sys-libs/glibc: 2.41-r2::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 volatile: False sync-rsync-verify-jobs: 1 sync-rsync-verify-max-age: 3 sync-rsync-extra-opts: sync-rsync-verify-metamanifest: yes guru location: /var/db/repos/guru sync-type: git sync-uri: https://github.com/gentoo-mirror/guru.git masters: gentoo volatile: False haskell location: /var/db/repos/haskell sync-type: git sync-uri: https://github.com/gentoo-mirror/haskell.git masters: gentoo priority: 99 volatile: False Internal location: /var/db/repos/Internal masters: gentoo priority: 100 volatile: False Binary Repositories: gentoobinhost priority: 1 sync-uri: https://distfiles.gentoo.org/releases/amd64/binpackages/23.0/x86-64 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -march=znver1 -fomit-frame-pointer -pipe -fno-ident -fweb -w" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/portage/config/repos.conf /usr/share/themes/oxygen-gtk/gtk-2.0 /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/portage/package.use/zzz-automatic /etc/revdep-rebuild /etc/sandbox.d" CXXFLAGS="-O2 -march=znver1 -fomit-frame-pointer -pipe -fno-ident -fweb -w" DISTDIR="/var/cache/distfiles" EMERGE_DEFAULT_OPTS="--keep-going --oneshot --quiet-build y --alert y --ask-enter-invalid" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME" FCFLAGS="-O2 -march=znver1 -fomit-frame-pointer -pipe -fno-ident -fweb -w" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live candy collision-protect config-protect-if-modified distlocks ebuild-locks export-pms-vars fixlafiles ipc-sandbox merge-sync merge-wait mount-sandbox multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms split-elog split-log strict unknown-features-warn unmerge-backup unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync warn-on-large-env xattr" FFLAGS="-O2 -march=znver1 -fomit-frame-pointer -pipe -fno-ident -fweb -w" GENTOO_MIRRORS="https://mirror.netcologne.de/gentoo/ https://ftp.halifax.rwth-aachen.de/gentoo/ https://ftp-stud.hs-esslingen.de/pub/Mirrors/gentoo/" LANG="de_LU.utf8" LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed" LEX="flex" LINGUAS="de lb lu fr en" MAKEOPTS="-j4 --load-average=4 -s" PKGDIR="/var/cache/binpkgs" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" SHELL="/bin/bash" USE="X a52 aac acl acpi activities alsa amd64 bluetooth branding bzip2 cairo cdda cdr cet crypt cups custom-cflags d3d9 dbus declarative dist-kernel dri dts dvd dvdr elogind encode exif flac gdbm gif gpm grub gui iconv icu ipv6 jpeg kde keyring kwallet lcms libnotify libtirpc mad mng mp3 mp4 mpeg multilib ncurses nls offensive ogg openal opencl opengl openmp opus pam pango pcre pdf pipewire plasma png policykit ppds pulseaudio qml qt5 qt6 readline screencast sdl seccomp semantic-desktop sound spell ssl startup-notification svg test-rust threads tiff truetype udev udisks unicode upower usb vaapi vdpau vorbis vulkan webp widgets wxwidgets x264 x265 xattr xcb xft xml xv xvid zlib" ABI_X86="64" ADA_TARGET="gcc_14" ALSA_CARDS="hda-intel" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_anon authn_dbm authn_file authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" GRUB_PLATFORMS="pc multiboot" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" L10N="de lb lu fr en en-GB" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres17" PYTHON_SINGLE_TARGET="python3_13" PYTHON_TARGETS="python3_13" RUBY_TARGETS="ruby32" SANE_BACKENDS="net escl" VIDEO_CARDS="amdgpu radeonsi radeon" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account" Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS ================================================================= Package Settings ================================================================= kde-apps/kio-extras-25.04.1::gentoo was built with the following: USE="X activities handbook libproxy man phonon sftp -debug -ios -mtp -nfs -openexr -samba -taglib -test" ABI_X86="(64)" >>> Attempting to run pkg_info() for 'kde-apps/kio-extras-25.04.1' kde-apps/thumbnailers-25.04.0::gentoo was built with the following: USE="pdf raw video -blender -gettext -mobi" ABI_X86="(64)" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live candy collision-protect compress-build-logs config-protect-if-modified distlocks ebuild-locks export-pms-vars fixlafiles ipc-sandbox merge-sync merge-wait mount-sandbox multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms split-elog split-log strict unknown-features-warn unmerge-backup unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync warn-on-large-env xattr" kde-apps/ffmpegthumbs-25.04.0::gentoo was built with the following: USE="-debug" ABI_X86="(64)" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live candy collision-protect compress-build-logs config-protect-if-modified distlocks ebuild-locks export-pms-vars fixlafiles ipc-sandbox merge-sync merge-wait mount-sandbox multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms split-elog split-log strict unknown-features-warn unmerge-backup unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync warn-on-large-env xattr" >>> Attempting to run pkg_info() for 'kde-apps/ffmpegthumbs-25.04.0'
Why is your system in inconsistent upgrade state? On a ~amd64 system, there is no good reason for that: > kde-apps/kio-extras-25.04.1::gentoo > kde-apps/thumbnailers-25.04.0::gentoo > kde-apps/ffmpegthumbs-25.04.0::gentoo All of these should be at 25.04.1. That should not be fatal by itself, but could have you miss bug fixes - but also makes me wonder what other packages are in half upgrade state right now, before we even begin trying to understand your problem.
