Due to a lack of serialisation in modem-to-port mappings, two modem plugins can end up trying to control the same port. This results in colourful fireworks displays like the below: mm_serial_port_close(): (ttyUSB3) serial port closed modem-manager[27312]: <debug> [1360339252.910559] [mm-manager.c:714] supports_callback(): (tty/ttyUSB3): plugin 0x7f89a8007980 (Cinterion) existing 0x7f89a8007a80 (Sierra) info->best 0$ ** ERROR:mm-manager.c:715:supports_callback: code should not be reached Based on a rather circuitous chain of bug reports, I ended up with an upstream commit that should address this. This is linked in the URL field for your convenience. Would it be possible to have a 0.6.0.0-r1 with this commit please? The current failure mode, combined with NetworkManager restarting modemmanager immediately results in a rapid ping/pong that ultimately confuses the firmware on my Sierra 8790 enough that it jettisons the USB interfaces and plays dead. My initial thought was that the card might have failed, and as such it was replaced with an 8795V. Based on this, I am reasonably confident that the failure is in software, not hardware. Upgrading to the pre-releases drove the modem correctly, but ultimately confused cinnamon's NM applet and left me unable to initiate the 3G link. Portage 2.1.11.50 (default/linux/amd64/13.0/developer, gcc-4.6.3, glibc-2.16.0, 3.8.0-rc6-00154-g124b69b-dirty x86_64) ================================================================= System uname: Linux-3.8.0-rc6-00154-g124b69b-dirty-x86_64-Intel-R-_Core-TM-_i7-2620M_CPU_@_2.70GHz-with-gentoo-2.2 KiB Mem: 3942232 total, 874392 free KiB Swap: 8000364 total, 7968756 free Timestamp of tree: Mon, 11 Feb 2013 08:30:01 +0000 ld GNU ld (GNU Binutils) 2.23.1 app-shells/bash: 4.2_p42 dev-java/java-config: 2.1.12-r1 dev-lang/python: 2.7.3-r3 dev-util/cmake: 2.8.10.2-r1 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.11.8 sys-apps/sandbox: 2.6 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.9.6-r3, 1.11.6, 1.12.6, 1.13.1 sys-devel/binutils: 2.23.1 sys-devel/gcc: 4.5.4, 4.6.3 sys-devel/gcc-config: 1.8 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.7 (virtual/os-headers) sys-libs/glibc: 2.16.0 Repositories: gentoo ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA dlj-1.1 sun-bcla-java-vm AdobeFlash-10.1 AdobeFlash-10.3 skype-eula skype-4.0.0.7-copyright Oracle-BCLA-JavaSE google-chrome PUEL" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt /usr/share/openvpn/easy-rsa" 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=native" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs collision-protect config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch protect-owned sandbox sfperms sign splitdebug strict test-fail-continue unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="ftp://mirror.bytemark.co.uk/gentoo/ ftp://mirror.qubenet.net/mirror/gentoo ftp://gentoo.virginmedia.com/sites/gentoo" LANG="en_GB.utf8" LC_ALL="en_GB.UTF-8" LDFLAGS="-Wl,-O1,--as-needed,--hash-style=gnu" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --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="" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac aalib acl acpi alsa amd64 amr apng archive autoipd avahi bash-completion berkdb binfilter bluetooth branding bs2b bzip2 cairo caps cdda cdparanoia cdr cli consolekit cracklib crypt cups curl cxx dbus dconf device-mapper dhcp dhcpcd dirac djvu dri dts dvd dvdr dvi eds emboss encode evo exif extras faac fat fbcon ffmpeg fftw firefox fits flac fontconfig fortran fpx ftdi fuse g3dvl gbm gcj gconf gd gdbm gdu geoloc gif gimp gjs glamor gles gles2 gnome gnome-keyring gnutls google gpg gphoto2 gpm graphite graphviz gs gsm gstreamer gtk gtk3 health hwdb iconv icu idn introspection iphone iproute2 ipv6 jbig jce jemalloc jpeg jpeg2k lcms ldap libcaca libkms libnl libnotify libsamplerate libssh2 llvm llvm-gcc lto lzma lzo mad map md5sum minizip mmx mmxext mng modemmanager modules mp3 mp4 mpeg mpg123 mudflap multilib natspec nautilus ncat ncurses ndiff network network-cron networkmanager nls nping nptl nsplugin ntp odf ofono ogg openexr opengl openmp openvg openvpn osmesa pam pango pcre pdf png pnm policykit ppds pth pulseaudio qt-static qt3support raw readline realtime rle rtmp samba schroedinger sdl secure-delete session smime smp sna sndfile snmp speex spell sse sse2 ssl ssse3 startup-notification svg t1lib theora threads thumbnail thunar tiff timezone truetype udev udisks unicode upnp upower urandom usb v4l v4l2 vala vorbis vpnc vpx webkit wmf wps wxwidgets x264 xcb xinerama xml xmp xpm xps xrandr xv xvfb xvid xvmc zeroconf zlib" ABI_X86="64" ALSA_CARDS="hda-intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" 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" CAMERAS="canon 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 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" PHP_TARGETS="php5-3" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" RUBY_TARGETS="ruby18 ruby19" 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: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Here is the actual Gnome bug report, which is rather more informative then the Launchpad bug I initially found: https://bugzilla.gnome.org/show_bug.cgi?id=685398
Fixed, thanks for finding the patch. +*modemmanager-0.6.0.0-r1 (12 Feb 2013) + + 12 Feb 2013; Alexandre Rostovtsev <tetromino@gentoo.org> + -files/modemmanager-0.5-glib-2.31.patch, -modemmanager-0.5.2.0-r3.ebuild, + +modemmanager-0.6.0.0-r1.ebuild, + +files/modemmanager-0.6.0.0-multi-plugin-probing.patch: + Add a patch to prevent multiple plugins from simultaneously controlling one + modem port (bug #456782, thanks to Tony Vroon). Drop old.
