On Mon, 2013-08-12 at 02:42 -0400, Weedy wrote:
> Hello again, I've gotten better at back traces.
>
> I: [pulseaudio] module.c: Loaded "module-alsa-card" (index: #5;
> argument: "device_id="0" name="pci-0000_00_1b.0"
> card_name="alsa_card.pci-0000_00_1b.0" 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"").
> I: [pulseaudio] module-udev-detect.c: Card
> /devices/pci0000:00/0000:00:1b.0/sound/card0
> (alsa_card.pci-0000_00_1b.0) module loaded.
> D: [pulseaudio] module-udev-detect.c: /dev/snd/controlC1 is accessible: yes
> D: [pulseaudio] module-udev-detect.c:
> /devices/pci0000:00/0000:00:1d.7/usb2/2-1/2-1:1.2/sound/card1 is busy: no
> D: [pulseaudio] module-udev-detect.c: Loading module-alsa-card with
> arguments 'device_id="1" name="usb-HP_HP_Webcam_3110-02-H3110"
> card_name="alsa_card.usb-HP_HP_Webcam_3110-02-H3110" 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"'
> D: [pulseaudio] reserve-wrap.c: Successfully acquired reservation lock
> on device 'Audio1'
> I: [pulseaudio] utils.c: could not open configuration file
> /usr/share/alsa/ucm/HP Webcam 3110/HP Webcam 3110.conf
> I: [pulseaudio] parser.c: error: could not parse configuration for card
> HP Webcam 3110
> I: [pulseaudio] main.c: error: failed to import HP Webcam 3110 use case
> configuration -2
> I: [pulseaudio] alsa-ucm.c: UCM not available for card HP Webcam 3110
> D: [pulseaudio] alsa-mixer.c: Looking at profile input:analog-mono
> D: [pulseaudio] alsa-mixer.c: Checking for recording on Analog Mono
> (analog-mono)
> D: [pulseaudio] alsa-util.c: Trying hw:1 with SND_PCM_NO_AUTO_FORMAT ...
> D: [pulseaudio] alsa-util.c: Managed to open hw:1
> D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 11888 ms
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7fffed2aa700 (LWP 14479)]
> snd_pcm_area_silence (dst_area=dst_area at entry=0x7fffed2a9c50,
> dst_offset=dst_offset at entry=15566, samples=2, samples at entry=17202,
> format=format at entry=SND_PCM_FORMAT_S16_LE)
> at
> /var/tmp/portage/media-libs/alsa-lib-1.0.27.2/work/alsa-lib-1.0.27.2/src/pcm/pcm.c:2571
> 2571
> /var/tmp/portage/media-libs/alsa-lib-1.0.27.2/work/alsa-lib-1.0.27.2/src/pcm/pcm.c:
> No such file or directory.
> (gdb) bt full
> #0 snd_pcm_area_silence (dst_area=dst_area at entry=0x7fffed2a9c50,
> dst_offset=dst_offset at entry=15566, samples=2, samples at entry=17202,
> format=format at entry=SND_PCM_FORMAT_S16_LE) at
> /var/tmp/portage/media-libs/alsa-lib-1.0.27.2/work/alsa-lib-1.0.27.2/src/pcm/pcm.c:2571
> dwords = <optimized out>
> dstp = <optimized out>
> dst = <optimized out>
> dst_step = <optimized out>
> width = 16
> silence = 0
> __FUNCTION__ = "snd_pcm_area_silence"
> #1 0x00007fffed2fd20d in snd_pcm_areas_silence (dst_areas=0x677070,
> dst_offset=7783, channels=<optimized out>, frames=8601,
> format=SND_PCM_FORMAT_S16_LE)
> at
> /var/tmp/portage/media-libs/alsa-lib-1.0.27.2/work/alsa-lib-1.0.27.2/src/pcm/pcm.c:2684
> d = {addr = 0x7ffff7fdb000, first = 0, step = 16}
> step = <optimized out>
> begin = <optimized out>
> chns = 2
> err = <optimized out>
> addr = <optimized out>
> width = 16
> #2 0x00007fffed33ea85 in snd_pcm_softvol_write_areas (pcm=0x7317e0,
> areas=0x677050, offset=<optimized out>, size=8601,
> slave_areas=<optimized out>, slave_offset=7783,
> slave_sizep=0x7fffed2a9d60) at
> /var/tmp/portage/media-libs/alsa-lib-1.0.27.2/work/alsa-lib-1.0.27.2/src/pcm/pcm_softvol.c:607
> svol = 0x71f8d0
> #3 0x00007fffed30f403 in snd_pcm_plugin_mmap_commit (pcm=0x7317e0,
> offset=<optimized out>, size=8601)
> at
> /var/tmp/portage/media-libs/alsa-lib-1.0.27.2/work/alsa-lib-1.0.27.2/src/pcm/pcm_plugin.c:424
> frames = 8601
> cont = 8601
> slave_frames = 8601
> err = <optimized out>
> slave_areas = 0x677050
> slave_offset = 7783
> result = <optimized out>
> plugin = 0x71f8d0
> slave = 0x72e060
> areas = 0x677050
> appl_offset = 7783
> slave_size = 15528
> xfer = <optimized out>
> __FUNCTION__ = "snd_pcm_plugin_mmap_commit"
> #4 0x00007fffed5b923a in mmap_write (on_timeout=false, polled=false,
> sleep_usec=<synthetic pointer>, u=0x6d1570) at modules/alsa/alsa-sink.c:647
> chunk = {memblock = 0x7fffe80019b0, index = 0, length = 34404}
> err = <optimized out>
> frames = 8601
> sframes = <optimized out>
> written = 34404
> p = <optimized out>
> areas = 0x677050
> offset = 7783
> n = <optimized out>
> n_bytes = 62112
> r = <optimized out>
> after_avail = false
> ---Type <return> to continue, or q <return> to quit---
> process_usec = 20000
> left_to_play = <optimized out>
> input_underrun = <optimized out>
> work_done = false
> max_sleep_usec = 351519
> j = 1
> #5 thread_func (userdata=0x6d1570) at modules/alsa/alsa-sink.c:1734
> work_done = <optimized out>
> sleep_usec = 0
> on_timeout = <optimized out>
> ret = <optimized out>
> rtpoll_sleep = 0
> real_sleep = <optimized out>
> u = 0x6d1570
> revents = 0
> __func__ = "thread_func"
> __PRETTY_FUNCTION__ = "thread_func"
> #6 0x00007ffff76d6356 in internal_thread_func (userdata=0x68d820) at
> pulsecore/thread-posix.c:83
> t = 0x68d820
> #7 0x00007ffff6e28fdb in start_thread () from /lib64/libpthread.so.0
> No symbol table info available.
> #8 0x00007ffff696027d in clone () from /lib64/libc.so.6
> No symbol table info available.
> (gdb)
Seems similar to [1]. This is probably alsa-lib bug, so it's better to
report this to the alsa-devel mailing list.
[1] https://bugs.freedesktop.org/show_bug.cgi?id=51060
--
Tanu
