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Bug 942943 - gui-apps/xwaylandvideobridge-0.4.0 autostarts under Xvnc plasma session
Summary: gui-apps/xwaylandvideobridge-0.4.0 autostarts under Xvnc plasma session
Status: UNCONFIRMED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal
Assignee: Gentoo KDE team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-11-06 12:13 UTC by Robin Bankhead
Modified: 2024-11-07 10:44 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Robin Bankhead 2024-11-06 12:13:09 UTC
gui-apps/xwaylandvideobridge-0.4.0 autostarts under Xvnc (net-misc/tigervnc) plasma session - and proceeds to wallop 100% CPU, which is bad but moot since it should not be running at all.

=kde-plasma/plasma-meta-6.2.2

emerge --info xwaylandvideobridge 
Portage 3.0.66.1 (python 3.12.7-final-0, default/linux/amd64/23.0/split-usr/desktop/plasma, gcc-14, glibc-2.40-r5, 6.11.0-gentoo x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-6.11.0-gentoo-x86_64-Intel-R-_Core-TM-_i7-7600U_CPU_@_2.80GHz-with-glibc2.40
KiB Mem:    16115100 total,  10838316 free
KiB Swap:   18753532 total,  18753532 free
Timestamp of repository gentoo: Fri, 01 Nov 2024 21:00:00 +0000
Head commit of repository gentoo: 5b531b43b586a716115b32f88527e165eb4568c0
Head commit of repository kdab-overlay: 1a81be19dfa239cd4796da866b2b623ca32f4864

sh bash 5.2_p37
ld GNU ld (Gentoo 2.43 p2) 2.43.1
ccache version 4.10.2 [disabled]
app-misc/pax-utils:        1.3.8::gentoo
app-shells/bash:           5.2_p37::gentoo
dev-build/autoconf:        2.72-r1::gentoo
dev-build/automake:        1.16.5-r2::gentoo, 1.17-r1::gentoo
dev-build/cmake:           3.30.5::gentoo
dev-build/libtool:         2.5.3::gentoo
dev-build/make:            4.4.1-r100::gentoo
dev-build/meson:           1.5.2::gentoo
dev-java/java-config:      2.3.4::gentoo
dev-lang/perl:             5.40.0::gentoo
dev-lang/python:           3.12.7_p1::gentoo, 3.13.0::gentoo
dev-lang/rust-bin:         1.82.0::gentoo
dev-util/ccache:           4.10.2-r1::gentoo
sys-apps/baselayout:       2.15::gentoo
sys-apps/openrc:           0.55.1::gentoo
sys-apps/sandbox:          2.39::gentoo
sys-devel/binutils:        2.43-r1::gentoo
sys-devel/binutils-config: 5.5.2::gentoo
sys-devel/clang:           18.1.8::gentoo
sys-devel/gcc:             14.2.0::gentoo
sys-devel/gcc-config:      2.11::gentoo
sys-devel/llvm:            18.1.8-r4::gentoo, 19.1.2::gentoo
sys-kernel/linux-headers:  6.11::gentoo (virtual/os-headers)
sys-libs/glibc:            2.40-r5::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://hazel/gentoo-portage
    priority: -1000
    volatile: True
    sync-rsync-verify-jobs: 1
    sync-rsync-verify-max-age: 3
    sync-rsync-extra-opts: 
    sync-rsync-verify-metamanifest: no

kdab-overlay
    location: /var/db/repos/kdab-overlay
    sync-type: git
    sync-uri: https://github.com/KDAB/kdab-overlay.git
    masters: gentoo
    volatile: False

x-portage
    location: /usr/local/portage
    masters: gentoo
    priority: 0
    volatile: True

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe -fomit-frame-pointer"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /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/php/apache2-php8.1/ext-active/ /etc/php/apache2-php8.2/ext-active/ /etc/php/apache2-php8.3/ext-active/ /etc/php/cgi-php8.1/ext-active/ /etc/php/cgi-php8.2/ext-active/ /etc/php/cgi-php8.3/ext-active/ /etc/php/cli-php8.1/ext-active/ /etc/php/cli-php8.2/ext-active/ /etc/php/cli-php8.3/ext-active/ /etc/php/fpm-php8.1/ext-active/ /etc/php/fpm-php8.2/ext-active/ /etc/php/fpm-php8.3/ext-active/ /etc/php/phpdbg-php8.1/ext-active/ /etc/php/phpdbg-php8.2/ext-active/ /etc/php/phpdbg-php8.3/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -O2 -pipe -fomit-frame-pointer"
DISTDIR="/var/cache/distfiles"
EMERGE_DEFAULT_OPTS="--nospinner --verbose-conflicts --quiet-build=n"
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="-march=native -O2 -pipe -fomit-frame-pointer"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg-live distlocks ebuild-locks fail-clean fixlafiles ipc-sandbox merge-sync merge-wait multilib-strict network-sandbox news pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync"
FFLAGS="-march=native -O2 -pipe -fomit-frame-pointer"
GENTOO_MIRRORS="http://www.mirrorservice.org/sites/distfiles.gentoo.org/ http://mirrors.gethosted.online/gentoo http://mirrors.soeasyto.com/distfiles.gentoo.org/"
LANG="en_GB.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs"
LEX="flex"
LINGUAS="en_GB"
MAKEOPTS="-j5"
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="/tmp"
SHELL="/bin/bash"
USE="X a52 aac acl acpi activities alsa amd64 bash-completion bluetooth branding bzip2 cairo cdda cddb cdr cet crypt css cups dbus declarative dga djvu dri dri3 dts dvd dvdr egl elogind encode exif fam fbcon ffmpeg flac ftp gbm gd gdbm geoip gif gimp gles gles2 gmp gphoto2 gpm graphviz gtk gui hddtemp iconv icu imagemagick imap inotify ipv6 java javascript jit jpeg kde kf6compat kwallet lame latex lcms libglvnd libnotify libtirpc lm-sensors lto lzma lzo mad matroska mbox mmap mng mp3 mp4 mpeg mplayer mtp multilib musicbrainz mysql ncurses networkmanager nls ocamlopt offensive ofx ogg opengl openmp pam pango pcre pda pdf perl php pipewire plasma png policykit posix postscript ppds pulseaudio qml qt5 qt6 radius raw readline rss rtc samba scanner screencast sdl seccomp session sharedmem smp snmp sockets socks5 sound spell split-usr sqlite sqlite3 ssl startup-notification subversion svg syslog tcpd test-rust theora threads tidy tiff tk tokenizer truetype udev udisks unicode upnp upnp-av upower usb v4l vaapi vcd vhosts vnc vorbis vulkan wayland webp widgets wifi wmf wps wxwidgets x264 xattr xcb xft xml xpm xscreensaver xv xvid xvmc zlib" ABI_X86="64" ADA_TARGET="gcc_12" 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 sse sse2 sse3 sse4_1 sse4_2 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="efi-64 multiboot" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" L10N="en-GB" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LLVM_TARGETS="X86 BPF" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres16" PYTHON_SINGLE_TARGET="python3_12" PYTHON_TARGETS="python3_12" RUBY_TARGETS="ruby32" SANE_BACKENDS="net" VIDEO_CARDS="intel i965 iris" 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
=================================================================

gui-apps/xwaylandvideobridge-0.4.0::gentoo was built with the following:
USE="-debug" ABI_X86="(64)"
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2024-11-06 12:58:38 UTC
(In reply to Robin Bankhead from comment #0)
> moot since it should not be running at all.
> 

How did you conclude this? https://invent.kde.org/system/xwaylandvideobridge#how-to-use implies it's working as intended wrt autostart.
Comment 2 Robin Bankhead 2024-11-06 19:50:15 UTC
How do I conclude that "XWayland Video Bridge" should not be running in a non-Wayland session?

I confess, nothing but intuition, which has failed me before. But I hope you can see how one might arrive at that misapprehension.

If it is indeed supposed to be running even under X11, then the CPU meltdown is rendered un-moot and may be made the main thrust of this report.
Comment 3 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2024-11-06 23:20:03 UTC
Ah, sorry, obviously the VNC session isn't running under Wayland.
Comment 4 Robin Bankhead 2024-11-07 10:44:01 UTC
No worries. I really wasn't clear on what this app is for, I just had it pulled in by plasma-meta which I was ordered to emerge as a precondition for filing other Plasma-related bugs.

For completeness as I hadn't checked this before reporting, it does not run under a "normal" Xorg session, so either KDE (ksmserver?) decides not to launch it, or when launched it sees an X11 environment and exits. So presumably it is the logic in one of these places that has a blind-spot for Xvnc.