When I run media-video/vlc-3.0.8::gentoo with OpenGL video output enabled, subtitles are working well. But when I enable X11 or XVideo output, subtitles won't show. Reproducible: Always Steps to Reproduce: 1. Tools 2. Preferences 3. Video 4. Change output Portage 2.3.89 (python 3.6.10-final-0, default/linux/amd64/17.1/hardened, gcc-9.2.0, glibc-2.29-r7, 4.19.97-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-4.19.97-gentoo-x86_64-Intel-R-_Core-TM-_i7-4510U_CPU_@_2.00GHz-with-gentoo-2.6 KiB Mem: 8059156 total, 78604 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Sun, 05 Apr 2020 00:45:01 +0000 Head commit of repository gentoo: b3686ff7aee4ece15744169e0feda1ca0578e019 Timestamp of repository libressl: Fri, 27 Mar 2020 08:23:12 +0000 Head commit of repository libressl: c885727f9d76c38219f564d8c036dfb943f739f9 sh bash 4.4_p23-r1 ld GNU ld (Gentoo 2.33.1 p2) 2.33.1 ccache version 3.7.7 [enabled] app-shells/bash: 4.4_p23-r1::gentoo dev-lang/perl: 5.30.1::gentoo dev-lang/python: 2.7.17-r2::gentoo, 3.6.10-r1::gentoo, 3.7.7-r1::gentoo dev-util/ccache: 3.7.7-r1::gentoo dev-util/cmake: 3.16.5::gentoo sys-apps/baselayout: 2.6-r1::gentoo sys-apps/openrc: 0.42.1::gentoo sys-apps/sandbox: 2.13::gentoo sys-devel/autoconf: 2.13-r1::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.16.1-r1::gentoo sys-devel/binutils: 2.33.1-r1::gentoo sys-devel/gcc: 9.2.0-r2::gentoo sys-devel/gcc-config: 2.2.1::gentoo sys-devel/libtool: 2.4.6-r6::gentoo sys-devel/make: 4.2.1-r4::gentoo sys-kernel/linux-headers: 5.4::gentoo (virtual/os-headers) sys-libs/glibc: 2.29-r7::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 sync-rsync-extra-opts: sync-rsync-verify-metamanifest: yes sync-rsync-verify-max-age: 24 sync-rsync-verify-jobs: 1 crossdev location: /var/db/repos/crossdev masters: gentoo libressl location: /var/db/repos/libressl sync-type: git sync-uri: https://github.com/gentoo-mirror/libressl.git masters: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=native -ggdb" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -march=native -ggdb" DISTDIR="/var/cache/distfiles" EMERGE_DEFAULT_OPTS=" --complete-graph --with-bdeps=y" ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR" FCFLAGS="-O2 -pipe -march=native -ggdb" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs ccache config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe -march=native -ggdb" GENTOO_MIRRORS="https://mirrors.tuna.tsinghua.edu.cn/gentoo ftp://ftp.fi.muni.cz/pub/linux/gentoo/ http://ftp.fi.muni.cz/pub/linux/gentoo/ rsync://ftp.fi.muni.cz/pub/linux/gentoo/ ftp://mirror.dkm.cz/gentoo/ https://mirror.dkm.cz/gentoo/ http://mirror.dkm.cz/gentoo/ rsync://mirror.dkm.cz/gentoo/ http://gentoo.mirror.web4u.cz/ ftp://gentoo.mirror.web4u.cz/" LANG="C.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j4" 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" USE="X acl alsa alsa-plugin amd64 apng bash-completion bindist bluetooth btrfs bzip2 cairo cgroups crypt cups dbus device-mapper djvu egl elogind equalizer firmware gtk gui hardened iconv icu ipv6 jpeg kde libressl libtirpc lua luajit multilib ncurses nls nptl ogg opengl openmp pam pcre pdf pie plasma png postproc printsupport pulseaudio qt5 readline script seccomp secure-delete split-usr sqlite ssl ssp svg tmux tremor unicode vim vim-syntax vorbis wayland xattr xtpax xwayland zlib" ABI_X86="64" ADA_TARGET="gnat_2018" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache 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="mmx mmxext sse sse2" CURL_SSL="libressl" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="mouse keyboard synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-2" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_6" PYTHON_TARGETS="python2_7 python3_6" RUBY_TARGETS="ruby24 ruby25" USERLAND="GNU" VIDEO_CARDS="intel" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS ================================================================= Package Settings ================================================================= media-video/vlc-3.0.8::gentoo was built with the following: USE="X a52 alsa aribsub dav1d dbus debug dts dvbpsi encode faad ffmpeg gcrypt jpeg kate libass libsamplerate libtiger live lua mad matroska mp3 mpeg musepack ncurses ogg opus png postproc pulseaudio qt5 sdl-image sftp sid soxr speex ssl svg theora tremor twolame upnp v4l vdpau vorbis vpx wayland x265 zvbi (-altivec) -aom -archive -bidi -bluray -cddb -chromaprint -chromecast -dc1394 (-directx) -dvd -fdk -flac -fluidsynth -fontconfig -gme -gnome-keyring -gstreamer -ieee1394 -jack (-libav) -libcaca -libnotify -libtar -linsys -lirc -macosx-notifications -modplug -mtp -nfs -omxil -optimisememory -projectm -rdp -run-as-root -samba -shout -skins -srt -taglib -test -truetype -udev -vaapi -vnc -x264 -xml -zeroconf" ABI_X86="(64)" CPU_FLAGS_X86="mmx sse" CXXFLAGS="-O2 -pipe -march=native -ggdb -std=c++11" FEATURES="binpkg-logs parallel-fetch usersync fixlafiles userfetch binpkg-dostrip ebuild-locks ccache unknown-features-warn preserve-libs multilib-strict protect-owned sandbox config-protect-if-modified network-sandbox usersandbox unmerge-orphans xattr news assume-digests qa-unresolved-soname-deps strict unmerge-logs binpkg-docompress sfperms ipc-sandbox userpriv merge-sync pid-sandbox distlocks" LDFLAGS="-Wl,-O1 -Wl,--as-needed -L/usr/lib64/sidplay/builders/"
To me it sounds like a bug in the software provided upstream. Does the same source work for you on another distribution?
I have added the bug into upstream bug tracker. https://trac.videolan.org/vlc/ticket/24588#ticket
