So this issue is a combination of the following patches: https://sourceware.org/git/?p=glibc.git;a=commit;h=47c5adebd2c864a098c3af66e61e1147dc3cf0b4 https://sourceware.org/git/?p=glibc.git;a=commit;h=03d41216fe09fc71a2750946af8fe2892bf4feb5
Basically the main problem is that futex_atomic_cmpxchg_inatomic got disabled, even though we have that well supported in our kernels. I just did another build (in canonical-arm-dev) including the patch bellow, and with that I'm unable to reproduce this bug: Index: glibc-2.21/sysdeps/unix/sysv/linux/arm/kernel-features.h =================================================================== --- glibc-2.21.orig/sysdeps/unix/sysv/linux/arm/kernel-features.h +++ glibc-2.21/sysdeps/unix/sysv/linux/arm/kernel-features.h @@ -37,8 +37,10 @@ /* The ARM kernel before 3.14.3 may or may not support futex_atomic_cmpxchg_inatomic, depending on kernel configuration. */ +/* #if __LINUX_KERNEL_VERSION < 0x030E03 # undef __ASSUME_FUTEX_LOCK_PI # undef __ASSUME_REQUEUE_PI # undef __ASSUME_SET_ROBUST_LIST #endif +*/ ** Changed in: gst-plugins-good1.0 (Ubuntu) Status: Confirmed => Invalid ** Changed in: pulseaudio (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1436162 Title: [pulsesink] abort at pthread_mutex_unlock(&m->mutex) == 0' failed at pulsecore/mutex-posix.c:118, function pa_mutex_unlock() with libc 2.21 Status in glibc package in Ubuntu: Confirmed Status in gst-plugins-good1.0 package in Ubuntu: Invalid Status in pulseaudio package in Ubuntu: Invalid Bug description: current build number: 146 device name: m75 channel: ubuntu-touch/vivid-proposed last update: 2015-03-24 13:57:03 version version: 146 After libc 2.21 landed, pulsesink fails constantly when pausing or seeking the active pipeline. Abort message: Assertion 'pthread_mutex_unlock(&m->mutex) == 0' failed at pulsecore/mutex-posix.c:118, function pa_mutex_unlock(). Aborting. This is basically happens when it tries to unlock a mutex that is already unlocked. This issue doesn't happen with libc 2.19. To reproduce the issue: GST_DEBUG=*pulse*:5 gst-launch-1.0 playbin uri=file:///tmp/foobar.mp3 Then when playing, just hit control+c, which will then pause the pipeline, causing the crash. The crash happens with most of the times you pause or seek the pipeline. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1436162/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp