247987 2010-08-15 21:21:41 +0000 Crash on quit 2011-04-27 21:32:59 +0000 1 1 3 Frameworks and Libraries phonon-backend-vlc general unspecified Unlisted Binaries Linux RESOLVED DUPLICATE 240001 NOR crash --- 1 hein martin.sandsmark albbas bcooksley colin fabo jb kevin.kofler martin.sandsmark myriam rdieter 0 oldest_to_newest 1004428 0 50585 hein 2010-08-15 21:21:41 +0000 Created attachment 50585 Crash backtrace Apps using phonon-vlc crash on quit after Phonon has seen use, e.g. playing a track in Amarok or playing a video in Dragon. Attached is a backtrace from Dragon on quitting it with a playing video having been paused beforehand. Dragon is 4.5.0; ffmpeg, VLC 1.1 and phonon-vlc are current git. Martin looked at the backtraces a few months ago (yes, this is a long-standing problem unfortunately) and said it's because two parts of the codebase seem to try and use XCloseDisplay(). He also believes PulseAudio is to blame because of what it does with X props on the root window or something along those lines. Martin also tells me that he doesn't wish to maintain the PulseAudio-related parts of Phonon nor is interested in fixing bugs in them, but that I should talk to you, Colin, instead, so I've added you to the CC list. 1004469 1 colin 2010-08-15 22:34:49 +0000 If it's related to XCloseDisplay, see the patch on http://pulseaudio.org/ticket/799 and see if it helps. This is currently applied in Mandriva cooker (and I've just pushed a build with this fix applied to 2010.1 main/testing too). If you use another distro, feel free to apply the PA patch yourself or by asking your friendly neighbourhood distro guy. 1004478 2 hein 2010-08-15 22:42:30 +0000 Rex, could you roll up a test package? 1004482 3 colin 2010-08-15 22:51:45 +0000 I should have CC'ed Rex in myself actually - my bad :) Rex FYI I just pushed the XCB patch out to PA's stable-queue, so if you want to just use it from there, that would work too. 1005669 4 hein 2010-08-17 18:03:32 +0000 Rex rolled a patched PulseAudio to test, and it still crashes. Amarok: Application: Amarok (amarok), signal: Segmentation fault 82 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) [Current thread is 1 (Thread 0x7f7f3d48f860 (LWP 2308))] Thread 8 (Thread 0x7f7efe788710 (LWP 2312)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 #1 0x00007f7f31266088 in Thread () from /home/sho/kdevel/4/install/lib/libvlccore.so.4 #2 0x00000031c2007761 in start_thread (arg=0x7f7efe788710) at pthread_create.c:301 #3 0x00000031c14e14ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Thread 7 (Thread 0x7f7ef7fff710 (LWP 2317)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 #1 0x00000031c8c7297b in wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88 #2 QWaitCondition::wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160 #3 0x000000369fc09c04 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c2ff80, th=0x2c3e0b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WeaverImpl.cpp:365 #4 0x000000369fc0c59b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x2c3e0b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:71 #5 0x000000369fc0c5b4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x2c3e0b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:74 #6 0x000000369fc0c5b4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x2c3e0b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:74 #7 0x000000369fc0af6f in ThreadWeaver::ThreadRunHelper::run (this=0x7f7ef7ffed00, parent=0x2c2ff80, th=0x2c3e0b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:87 #8 0x000000369fc0b448 in ThreadWeaver::Thread::run (this=0x2c3e0b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:142 #9 0x00000031c8c71e7e in QThreadPrivate::start (arg=0x2c3e0b0) at thread/qthread_unix.cpp:266 #10 0x00000031c2007761 in start_thread (arg=0x7f7ef7fff710) at pthread_create.c:301 #11 0x00000031c14e14ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Thread 6 (Thread 0x7f7ef58a1710 (LWP 2318)): #0 0x00000031c14da043 in select () at ../sysdeps/unix/syscall-template.S:82 #1 0x00000031c8d35d7d in QProcessManager::run (this=0x31c90814a0) at io/qprocess_unix.cpp:245 #2 0x00000031c8c71e7e in QThreadPrivate::start (arg=0x31c90814a0) at thread/qthread_unix.cpp:266 #3 0x00000031c2007761 in start_thread (arg=0x7f7ef58a1710) at pthread_create.c:301 #4 0x00000031c14e14ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Thread 5 (Thread 0x7f7ef4ea0710 (LWP 2320)): #0 0x00000031c14a6a6d in nanosleep () at ../sysdeps/unix/syscall-template.S:82 #1 0x00000031c14a68e0 in __sleep (seconds=0) at ../sysdeps/unix/sysv/linux/sleep.c:138 #2 0x00000031d9183d16 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x31d9488de0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2363 #3 0x00000031d9183db9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f7ef4e9fcd0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464 #4 0x00000031c2007761 in start_thread (arg=0x7f7ef4ea0710) at pthread_create.c:301 #5 0x00000031c14e14ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Thread 4 (Thread 0x7f7ee3fff710 (LWP 2323)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 #1 0x00000031c8c7297b in wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88 #2 QWaitCondition::wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160 #3 0x000000369fc09c04 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c2ff80, th=0x2444410) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WeaverImpl.cpp:365 #4 0x000000369fc0c59b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x2444410) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:71 #5 0x000000369fc0af6f in ThreadWeaver::ThreadRunHelper::run (this=0x7f7ee3ffed00, parent=0x2c2ff80, th=0x2444410) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:87 #6 0x000000369fc0b448 in ThreadWeaver::Thread::run (this=0x2444410) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:142 #7 0x00000031c8c71e7e in QThreadPrivate::start (arg=0x2444410) at thread/qthread_unix.cpp:266 #8 0x00000031c2007761 in start_thread (arg=0x7f7ee3fff710) at pthread_create.c:301 #9 0x00000031c14e14ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Thread 3 (Thread 0x7f7ee35fe710 (LWP 2324)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 #1 0x00000031c8c7297b in wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88 #2 QWaitCondition::wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160 #3 0x000000369fc09c04 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c2ff80, th=0x22f24b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WeaverImpl.cpp:365 #4 0x000000369fc0c59b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x22f24b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:71 #5 0x000000369fc0c5b4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x22f24b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:74 #6 0x000000369fc0af6f in ThreadWeaver::ThreadRunHelper::run (this=0x7f7ee35fdd00, parent=0x2c2ff80, th=0x22f24b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:87 #7 0x000000369fc0b448 in ThreadWeaver::Thread::run (this=0x22f24b0) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:142 #8 0x00000031c8c71e7e in QThreadPrivate::start (arg=0x22f24b0) at thread/qthread_unix.cpp:266 #9 0x00000031c2007761 in start_thread (arg=0x7f7ee35fe710) at pthread_create.c:301 #10 0x00000031c14e14ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Thread 2 (Thread 0x7f7ee19ce710 (LWP 2327)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 #1 0x00000031c8c7297b in wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88 #2 QWaitCondition::wait (this=<value optimized out>, mutex=0x2d8b620, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160 #3 0x000000369fc09c04 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c2ff80, th=0x35faa40) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WeaverImpl.cpp:365 #4 0x000000369fc0c59b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x35faa40) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:71 #5 0x000000369fc0c5b4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2c59410, th=0x35faa40) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/WorkingHardState.cpp:74 #6 0x000000369fc0af6f in ThreadWeaver::ThreadRunHelper::run (this=0x7f7ee19cdd00, parent=0x2c2ff80, th=0x35faa40) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:87 #7 0x000000369fc0b448 in ThreadWeaver::Thread::run (this=0x35faa40) at /usr/src/debug/kdelibs-4.5.0/threadweaver/Weaver/Thread.cpp:142 #8 0x00000031c8c71e7e in QThreadPrivate::start (arg=0x35faa40) at thread/qthread_unix.cpp:266 #9 0x00000031c2007761 in start_thread (arg=0x7f7ee19ce710) at pthread_create.c:301 #10 0x00000031c14e14ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Thread 1 (Thread 0x7f7f3d48f860 (LWP 2308)): [KCrash Handler] #6 __pthread_mutex_lock (mutex=0x2e0000534c4f43) at pthread_mutex_lock.c:50 #7 0x00000031c3449da7 in XrmDestroyDatabase (db=0xe54200) at Xrm.c:2642 #8 0x00000031c343476d in _XFreeDisplayStructure (dpy=0xe449e0) at OpenDis.c:839 #9 0x00000031c341fcbf in XCloseDisplay (dpy=0xe449e0) at ClDisplay.c:82 #10 0x0000003695e201f5 in qt_cleanup () at kernel/qapplication_x11.cpp:2638 #11 0x0000003695dbcb10 in QApplication::~QApplication (this=0x7fffcf010c30, __in_chrg=<value optimized out>) at kernel/qapplication.cpp:1121 #12 0x00007f7f3eb96f37 in App::~App() () from /home/sho/kdevel/4/install/lib64/libamaroklib.so.1 #13 0x00000000004081a5 in main () 1005674 5 colin 2010-08-17 18:21:49 +0000 Well in this case I don't see any PA references/threads, but I'd double check the code of your vlc library if that is the phonon backend you were using. If possibly try another phonon backend to see if this solves the issue. If it doesn't fix the issue then it likely is not the problem. 1005680 6 hein 2010-08-17 18:36:18 +0000 It only happens with phonon-vlc, sorry if I didn't make that clear in the initial report. It was Martin who blamed it on PulseAudio (but as you probably know best, that's the usual blamegame in town atm). 1005688 7 colin 2010-08-17 18:48:31 +0000 Actually it is quite clear in the original report that it's VLC only, but I'm a bit slow today :D I think then we can rule out PA's direct involvement if the XCB patch has been tested in this loop. I'm not sure where to go next, but just FYI Rémi wrote a nice description of the problems involved with Xlib here: http://thread.gmane.org/gmane.comp.audio.pulseaudio.general/7283 which may go some way to hinting at where the problem lies. Thinking about it, VLC's pulseaudio output does still call XInitThreads due to PA #799 (which is no longer needed due to the XCB patch Rex applied to PA) so it may be worth you (or Rex if he's feeling generous!) commenting out the call to vlc_xlib_init() in modules/audio_output/pulse.c in the VLC package to test that? Or alternatively, just comment out the actual XInitThreads call in include/vlc_xlib.h itself to prevent *any* vlc module doing it... Worth a try to rule it out I guess. 1005706 8 myriam 2010-08-17 19:25:58 +0000 Sorry, you people are too fast to react on bugs, even before I can mark this as a duplicate *sigh* *** This bug has been marked as a duplicate of bug 240001 *** 1005715 9 colin 2010-08-17 19:32:46 +0000 To be fair Myriam, seeing as I've commented and asked and said pretty much the same things on both, you'd think that *I'd* think to mark them as duplicates wouldn't you? :D 1016464 10 myriam 2010-09-09 09:41:55 +0000 *** Bug 250604 has been marked as a duplicate of this bug. *** 1112243 11 myriam 2011-04-27 21:32:59 +0000 Reassigning to the new bugzilla product for better bug tracing of the various backends. Sorry for the noise. 50585 2010-08-15 21:21:41 +0000 2010-08-15 22:23:16 +0000 Crash backtrace dragon-20100815-212119.kcrash text/plain 7598 hein QXBwbGljYXRpb246IERyYWdvbiBQbGF5ZXIgKGRyYWdvbiksIHNpZ25hbDogU2VnbWVudGF0aW9u IGZhdWx0CjgyCVRfUFNFVURPIChTWVNDQUxMX1NZTUJPTCwgU1lTQ0FMTF9OQU1FLCBTWVNDQUxM X05BUkdTKQpbQ3VycmVudCB0aHJlYWQgaXMgMSAoVGhyZWFkIDB4N2ZmYTgxMjljODIwIChMV1Ag MTQ4NTgpKV0KClRocmVhZCAxMCAoVGhyZWFkIDB4N2ZmYTQxNzcwNzEwIChMV1AgMTQ4NjEpKToK IzAgIHB0aHJlYWRfY29uZF93YWl0QEBHTElCQ18yLjMuMiAoKSBhdCAuLi9ucHRsL3N5c2RlcHMv dW5peC9zeXN2L2xpbnV4L3g4Nl82NC9wdGhyZWFkX2NvbmRfd2FpdC5TOjE2MgojMSAgMHgwMDAw N2ZmYTc1NTI2ZWI1IGluIFRocmVhZCAoKSBmcm9tIC9ob21lL3Noby9rZGV2ZWwvNC9pbnN0YWxs L2xpYi9saWJ2bGNjb3JlLnNvLjQKIzIgIDB4MDAwMDAwMzFjMjAwNzc2MSBpbiBzdGFydF90aHJl YWQgKGFyZz0weDdmZmE0MTc3MDcxMCkgYXQgcHRocmVhZF9jcmVhdGUuYzozMDEKIzMgIDB4MDAw MDAwMzFjMTRlMTRlZCBpbiBjbG9uZSAoKSBhdCAuLi9zeXNkZXBzL3VuaXgvc3lzdi9saW51eC94 ODZfNjQvY2xvbmUuUzoxMTUKClRocmVhZCA5IChUaHJlYWQgMHg3ZmZhNDEyY2Y3MTAgKExXUCAx NTI0MCkpOgojMCAgMHgwMDAwMDAzMWMyMDBlNDhkIGluIHJlYWQgKCkgYXQgLi4vc3lzZGVwcy91 bml4L3N5c2NhbGwtdGVtcGxhdGUuUzo4MgojMSAgMHgwMDAwN2ZmYTVjMzU3ODkyIGluIEZpbGVS ZWFkICgpIGZyb20gL2hvbWUvc2hvL2tkZXZlbC80L2luc3RhbGwvbGliNjQvdmxjL3BsdWdpbnMv YWNjZXNzL2xpYmZpbGVzeXN0ZW1fcGx1Z2luLnNvCiMyICAweDAwMDA3ZmZhNzU1NTVkYzEgaW4g QVJlYWRTdHJlYW0gKCkgZnJvbSAvaG9tZS9zaG8va2RldmVsLzQvaW5zdGFsbC9saWIvbGlidmxj Y29yZS5zby40CiMzICAweDAwMDA3ZmZhNzU1NTYzYzEgaW4gQVN0cmVhbVBlZWtTdHJlYW0gKCkg ZnJvbSAvaG9tZS9zaG8va2RldmVsLzQvaW5zdGFsbC9saWIvbGlidmxjY29yZS5zby40CiM0ICAw eDAwMDA3ZmZhNGFkZjVkMmMgaW4gR2VuZXJpY1Byb2JlICgpIGZyb20gL2hvbWUvc2hvL2tkZXZl bC80L2luc3RhbGwvbGliNjQvdmxjL3BsdWdpbnMvZGVtdXgvbGliZXNfcGx1Z2luLnNvCiM1ICAw eDAwMDA3ZmZhNGFkZjVmZTYgaW4gQTUyUHJvYmUgKCkgZnJvbSAvaG9tZS9zaG8va2RldmVsLzQv aW5zdGFsbC9saWI2NC92bGMvcGx1Z2lucy9kZW11eC9saWJlc19wbHVnaW4uc28KIzYgIDB4MDAw MDdmZmE0YWRmNTYwNyBpbiBPcGVuQXVkaW8gKCkgZnJvbSAvaG9tZS9zaG8va2RldmVsLzQvaW5z dGFsbC9saWI2NC92bGMvcGx1Z2lucy9kZW11eC9saWJlc19wbHVnaW4uc28KIzcgIDB4MDAwMDdm 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