Created attachment 355566 [details] dead locked upowerd stacktrace I'm using sys-power/upower-0.9.21 (though I'm pretty sure 0.9.20 was affected as well) and dev-libs/libusbx-1.0.16-r3, the default virtual/libusb:1 provider. Sometimes a problem starts that when I try to open Dolphin, Gwenview, or an open/save Qt dialog (I'm using KDE 4.11), the application freezes for a considerable amount of time and then works just fine. Same happens with opening some new tabs in Firefox (seems Adobe Flash-related). I tried attaching gdb to a couple of such frozen applications, and each time they were in the middle of some dbus calls, and lower in the frame stack were some upower-related functions. So I attached gdb to upowerd and indeed it seemed like it was in a deadlock. I'm attaching stack trace where you can see some libusbx code being called. Restarting upowerd fixes the issue until it happens again (could be days). I didn't try using dev-libs/libusb. $ emerge --info Portage 2.1.13.7 (default/linux/amd64/13.0/desktop/kde, gcc-4.7.3, glibc-2.17, 3.8.13-gentoo x86_64) ================================================================= System uname: Linux-3.8.13-gentoo-x86_64-Intel-R-_Core-TM-_i3-2310M_CPU_@_2.10GHz-with-gentoo-2.2 KiB Mem: 12058292 total, 1897320 free KiB Swap: 25598548 total, 25420172 free Timestamp of tree: Fri, 09 Aug 2013 19:45:01 +0000 ld GNU ld (GNU Binutils) 2.23.1 app-shells/bash: 4.2_p45 dev-java/java-config: 2.2.0 dev-lang/python: 2.7.5-r1, 3.2.5-r1 dev-util/cmake: 2.8.11.1 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.11.8 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6, 1.12.6, 1.14 sys-devel/binutils: 2.23.1 sys-devel/gcc: 4.7.3 sys-devel/gcc-config: 1.8 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.17 Repositories: gentoo local x11 roslin ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -march=native -fno-omit-frame-pointer -g -pipe" 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 /usr/share/themes/oxygen-gtk/gtk-3.0 /var/lib/hsqldb" 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 /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O2 -march=native -fno-omit-frame-pointer -g -pipe" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs compressdebug config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync metadata-transfer news parallel-fetch preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS=" http://gentoo.mirror.pw.edu.pl http://www.ibiblio.org/pub/Linux/distributions/gentoo http://distfiles.gentoo.org" LANG="pl_PL.utf8" LC_ALL="pl_PL.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu -Wl,--sort-common" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" 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" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage /var/lib/layman/x11 /var/lib/layman/roslin" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="X a52 aac acpi akonadi alsa amd64 avahi avx bash-completion berkdb bluray branding bzip2 c++0x cairo cdda cdr cli consolekit crypt cups cxx dbus declarative development dri dts dvd dvdr egl emboss encode exif fam ffmpeg fftw firefox flac fontconfig fortran gdbm gif git glib gmp gpm gstreamer iconv icu idn ios ipod ipv6 javascript jpeg jpeg2k kde kipi lame lcms libass libnotify lto lzma lzo mad mercurial mmap mmx mng modules mp3 mp4 mpeg mudflap multilib ncurses networkmanager nls nptl ogg openexr opengl openmp opus otr pam pango pch pcre pdf phonon plasma png policykit ppds private-headers pulseaudio qt3support qt4 quicktime readline samba schroedinger sdl semantic-desktop session smp sndfile spell sse sse2 sse3 sse4 sse4_1 sse4_2 ssl ssse3 startup-notification subversion svg tcpd theora threads threadsafe tiff truetype udev udisks unicode upnp upnp-av upower usb v4l vaapi valgrind vcd vim-syntax vorbis vpx wifi win32codecs wmf wxwidgets x264 xcb xcomposite xml xscreensaver xv xvid zeroconf zlib" ABI_X86="64" ALSA_CARDS="hda-intel" 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="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" FOO2ZJS_DEVICES="hp1020" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="pl_PL pl en_US en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-4" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby20" USERLAND="GNU" VIDEO_CARDS="i965 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: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
-r3 is already applying 2 patches for different deadlocks wrt https://bugzilla.redhat.com/show_bug.cgi?id=985484 0001-linux-Use-a-separate-lock-to-serialize-start-stop-vs.patch 0002-hotplug-Remove-use-of-pthread_cancel-from-linux_udev.patch I haven't been able to reproduce this despite using UPower with libusbx-1.0.16-r3 all the time, but maybe I just haven't noticed so I'd prefer if you would push it yourself to the upstream mailing list at, https://lists.sourceforge.net/lists/listinfo/libusbx-devel Mention you already have those two patches from above applied so they don't confuse this issue. And you can also try USE="-udev" in dev-libs/libusbx if you want to avoid the issue. No, I'm not sure if that will work or not.
Okay, now that I think about that, I'm not really sure which version of libusbx was actually being used by upowerd when it dead locked, as I didn't reboot/restart the daemon in a couple of days. I'll see if it happens again and then hit upstream if it does.
(In reply to Bartosz Brachaczek from comment #2) > Okay, now that I think about that, I'm not really sure which version of > libusbx was actually being used by upowerd when it dead locked, as I didn't > reboot/restart the daemon in a couple of days. I'll see if it happens again > and then hit upstream if it does. I'll close this bug now, please simply reopen it if you still see the need. Thanks!
