Without any effect that I would recognize, I got the following backtraces in Xorg.0.log: (EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)' (EE) BUG: /var/tmp/portage/x11-drivers/xf86-input-synaptics-1.7.4/work/xf86-input-synaptics-1.7.4/src/synaptics.c:2822 in UpdateTouchState() (EE) (EE) Backtrace: (EE) 0: /usr/lib64/xorg/modules/input/synaptics_drv.so (_init+0xd0f) [0x7f39d7217ddf] (EE) 1: /usr/lib64/xorg/modules/input/synaptics_drv.so (_init+0x30d3) [0x7f39d721b623] (EE) 2: /usr/lib64/xorg/modules/input/synaptics_drv.so (_init+0x4a04) [0x7f39d721f7f4] (EE) 3: /usr/bin/Xorg (DPMSSupported+0x1e7) [0x47a047] (EE) 4: /usr/bin/Xorg (xf86SerialModemClearBits+0x234) [0x4a3184] (EE) 5: /lib64/libpthread.so.0 (__restore_rt+0x0) [0x7f39de821b0f] (EE) 6: /lib64/libc.so.6 (__select+0x33) [0x7f39dd55f783] (EE) 7: /usr/bin/Xorg (WaitForSomething+0x190) [0x58f4c0] (EE) 8: /usr/bin/Xorg (SendErrorToClient+0xe1) [0x43bc91] (EE) 9: /usr/bin/Xorg (remove_fs_handlers+0x40a) [0x43fcba] (EE) 10: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x7f39dd49dbf5] (EE) 11: /usr/bin/Xorg (_start+0x29) [0x42a781] (EE) 12: ? (?+0x29) [0x29] These backtraces appear quite often four times in a row. Despite I do not experience any problem using my synaptics device, I believe that this may be worth check. Relevant info: - versions of relevant packages: eix -cI 'xorg-|x11-|xf86' [I] dev-perl/X11-Protocol (0.560.0-r1@10.11.2014): Client-side interface to the X11 Protocol [I] x11-apps/xf86dga (1.0.3@7.12.2014): test program for the XFree86-DGA extension [I] x11-base/xorg-drivers (1.15@9.1.2015): Meta package containing deps on all xorg drivers [I] x11-base/xorg-server (1.15.2-r1@13.1.2015): X.Org X servers [I] x11-base/xorg-x11 (7.4-r2@7.12.2014): An X11 implementation maintained by the X.Org Foundation (meta package) [I] x11-drivers/xf86-input-evdev (2.8.2@13.1.2015): Generic Linux input driver [I] x11-drivers/xf86-input-joystick (1.6.2@13.1.2015): X.Org driver for joystick input devices [I] x11-drivers/xf86-input-keyboard (1.7.0@13.1.2015): Keyboard input driver [I] x11-drivers/xf86-input-mouse (1.9.0@13.1.2015): X.Org driver for mouse input devices [I] x11-drivers/xf86-input-mutouch (1.3.0@18.5.2014): Microtouch input driver [I] x11-drivers/xf86-input-penmount (1.5.0@16.5.2014): PenMount input driver [I] x11-drivers/xf86-input-synaptics (1.7.4@13.1.2015): Driver for Synaptics touchpads [I] x11-drivers/xf86-video-intel (2.21.15@13.1.2015): X.Org driver for Intel cards [I] x11-drivers/xf86-video-modesetting (0.8.1@18.5.2014): Unaccelerated generic driver for kernel modesetting [I] x11-drivers/xf86-video-vesa (2.3.3@13.1.2015): Generic VESA video driver [I] x11-libs/libXxf86dga (1.1.4@7.12.2014): X.Org Xxf86dga library [I] x11-libs/libXxf86misc (1.0.3@13.4.2014): X.Org Xxf86misc library [I] x11-libs/libXxf86vm (1.1.3@12.4.2014): X.Org Xxf86vm library [I] x11-misc/xorg-cf-files (1.0.5@27.5.2014): Old Imake-related build files [I] x11-proto/xf86bigfontproto (1.2.0-r1@6.4.2014): X.Org XF86BigFont protocol headers [I] x11-proto/xf86dgaproto (2.1-r2@13.4.2014): X.Org XF86DGA protocol headers [I] x11-proto/xf86driproto (2.1.1-r1@12.4.2014): X.Org XF86DRI protocol headers [I] x11-proto/xf86miscproto (0.9.3@13.4.2014): X.Org XF86Misc protocol headers [I] x11-proto/xf86rushproto (1.1.2-r1@13.4.2014): X.Org XF86Rush protocol headers [I] x11-proto/xf86vidmodeproto (2.3.1-r1@12.4.2014): X.Org XF86VidMode protocol headers - emerge --info Portage 2.2.14 (python 3.3.5-final-0, default/linux/amd64/13.0/desktop/gnome/systemd, gcc-4.8.3, glibc-2.19-r1, 3.18.1-gentoo x86_64) ================================================================= System uname: Linux-3.18.1-gentoo-x86_64-Intel-R-_Core-TM-_i7-4700MQ_CPU_@_2.40GHz-with-gentoo-2.2 KiB Mem: 7833348 total, 965768 free KiB Swap: 7812092 total, 7796996 free Timestamp of tree: Thu, 15 Jan 2015 18:45:01 +0000 ld GNU ld (Gentoo 2.24 p1.4) 2.24 distcc 3.1 x86_64-pc-linux-gnu [disabled] ccache version 3.1.9 [disabled] app-shells/bash: 4.2_p53 dev-java/java-config: 2.2.0 dev-lang/perl: 5.18.2-r2 dev-lang/python: 2.7.9-r1, 3.3.5-r1, 3.4.1 dev-util/ccache: 3.1.9-r4 dev-util/cmake: 2.8.12.2-r1 dev-util/pkgconfig: 0.28-r1 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.12.4 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6-r1, 1.13.4 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.8.3 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2-r1 sys-devel/make: 4.0-r1 sys-kernel/linux-headers: 3.16 (virtual/os-headers) sys-libs/glibc: 2.19-r1 Repositories: gentoo MyOverlay science virtualization java fw-overlay perl6 enlightenment ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=core-avx2 -Wall -g -ggdb" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /opt/zookeeper/conf /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/maven-bin-3.0/conf /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 -pipe -march=core-avx2 -Wall -g -ggdb" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs compressdebug config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms split-elog splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://ftp.fi.muni.cz/pub/linux/gentoo/ ftp://ftp.fi.muni.cz/pub/linux/gentoo/ rsync://ftp.fi.muni.cz/pub/linux/gentoo/ http://gentoo.mirror.dkm.cz/pub/gentoo/ ftp://gentoo.mirror.dkm.cz/pub/gentoo/ rsync://gentoo.mirror.dkm.cz/gentoo/" LANG="cs_CZ.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j3" 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/science /var/lib/layman/virtualization /var/lib/layman/java /var/lib/layman/fw-overlay /var/lib/layman/perl6 /var/lib/layman/enlightenment" SYNC="rsync://rsync.cz.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa amd64 bash-completion berkdb bindist bluetooth branding bzip2 cairo cdda cdr cli colord cracklib crypt cups cxx dbus dri dts dvd dvdr eds emacs emacs-syntax emboss encode evo exif fam firefox flac fortran gdbm gif glamor gnome gnome-keyring gnome-online-accounts gnutls gpm gstreamer gtk gtk3 iconv idn introspection ipv6 jpeg kerberos lcms ldap libnotify libsecret mad mmx mng modules mp3 mp4 mpeg multilib nautilus ncurses networkmanager nls nptl nsplugin offensive ogg opengl openmp pam pango pcre pdf png policykit ppds pulseaudio qt3support readline resolvconf sdl semantic-desktop session socialweb spell sqlite sse sse2 ssl startup-notification svg systemd systemtap tcpd telepathy tiff tools tracker truetype udev udisks unicode upower usb vim-synta vim-syntax vorbis wxwidgets x264 xcb xinerama xml xv xvid zlib zsh-completion" ABI_X86="64" 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="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" 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 ublox ubx" INPUT_DEVICES="keyboard mouse mutouch evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="cs en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="intel vesa" 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" USE_PYTHON="3.3 2.7" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS Reproducible: Always Steps to Reproduce: 1. XOrg started via gdm 2. use the XOrg (cannot say more) Actual Results: The stack appears in XOrg.0.log Expected Results: Stack does not appear.
Created attachment 394054 [details] Xorg.0.log Full Xorg.0.log
This is presumably fixed by xf86-input-synaptics-1.7.5 and later. Please reopen if you still see this issue with xf86-input-synaptics-1.7.8 or 1.8.1.