I have to add that at that moment I had the midi keyboard connected and the pulseaudio mic volume was set to maximum.
mar 17 15:22:03 Billy pulseaudio[1726]: [alsa-source-ALC887 Analog] alsa-mixer.c: Assertion 'pa_cvolume_compatible_with_channel_map(v, cm)' failed at modules/alsa/alsa-mixer.c:1222, function pa_alsa_path_set_volume(). Aborting. mar 17 15:22:04 Billy pulseaudio[6344]: [pulseaudio] pid.c: Stale PID file, overwriting. mar 17 15:22:05 Billy pulseaudio[6344]: [pulseaudio] module-alsa-card.c: Failed to find a working profile. mar 17 15:22:05 Billy pulseaudio[6344]: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="2" name="usb-BEHRINGER_UMX_610-00" card_name="alsa_card.usb-BEHRINGER_UMX_610-00" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1""): initialization failed. mar 17 15:22:30 Billy pulseaudio[6344]: [pulseaudio] bluez5-util.c: GetManagedObjects() failed: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1539209 Title: pulseaudio crashed with SIGABRT in pa_alsa_path_set_volume() Status in pulseaudio package in Ubuntu: Confirmed Bug description: Appears randomly. ProblemType: Crash DistroRelease: Ubuntu 16.04 Package: pulseaudio 1:7.1-1ubuntu3 ProcVersionSignature: Ubuntu 4.3.0-7.18-generic 4.3.3 Uname: Linux 4.3.0-7-generic x86_64 ApportVersion: 2.19.4-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: potato 12883 F...m pulseaudio /dev/snd/controlC0: potato 12883 F.... pulseaudio /dev/snd/controlC1: potato 12883 F.... pulseaudio CurrentDesktop: Unity Date: Thu Jan 28 22:16:03 2016 ExecutablePath: /usr/bin/pulseaudio InstallationDate: Installed on 2016-01-17 (11 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) ProcCmdline: /usr/bin/pulseaudio --start --log-target=syslog ProcEnviron: PATH=(custom, no user) SHELL=/bin/bash LANG=ru_RU.UTF-8 LANGUAGE=ru XDG_RUNTIME_DIR=<set> Signal: 6 SourcePackage: pulseaudio StacktraceTop: pa_alsa_path_set_volume () from /usr/lib/pulse-7.1/modules/libalsa-util.so ?? () from /usr/lib/pulse-7.1/modules/libalsa-util.so pa_source_process_msg () from /usr/lib/libpulsecore-7.1.so ?? () from /usr/lib/pulse-7.1/modules/libalsa-util.so ?? () from /usr/lib/libpulsecore-7.1.so Title: pulseaudio crashed with SIGABRT in pa_alsa_path_set_volume() UpgradeStatus: Upgraded to xenial on 2016-01-28 (0 days ago) UserGroups: adm audio cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 12/07/2009 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: V1.11 dmi.board.name: JV71TR dmi.board.vendor: Acer dmi.board.version: Rev dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: None dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.11:bd12/07/2009:svnAcer:pnAspire7540:pvr0100:rvnAcer:rnJV71TR:rvrRev:cvnAcer:ct10:cvrNone: dmi.product.name: Aspire 7540 dmi.product.version: 0100 dmi.sys.vendor: Acer modified.conffile..etc.pulse.daemon.conf: [modified] mtime.conffile..etc.pulse.daemon.conf: 2016-01-25T21:44:07.089113 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1539209/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

