ga-z97-d3h motherboard, no sound using line out

any reason to select alsa_output.pci-0000_00_1b.0.analog-surround-71.monitor as default source

Default sink name: alsa_output.pci-0000_00_1b.0.analog-surround-71
Default source name: alsa_output.pci-0000_00_1b.0.analog-surround-71.monitor

I'll try to deattach the video card and test without it. The system will have only one physical output.

ubuntu only use 64k buffer

http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-October/021998.html

sample spec: s16le 8ch 44100Гц
 channel map: front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right
              Объёмный 7.1
 used by: 0
 linked by: 0
 configured latency: 0,00 ms; range is 0,50 .. 92,88 ms

https://wiki.ubuntu.com/PulseAudio/Log

check whether you get underrun/overrun in verbose pulseaudio log

this 92.88ms may be too small for 7.1 audio

Logged the pulseaudio log. What should I do now? I can reproduce the bug on a clean live-dvd image.

Tried this with no effect:
meklon@meklon-desktop:~/Музыка$ amixer set Master 100 unmute
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 87
  Mono: Playback 87 [100%] [0.00dB] [on]

meklon@meklon-desktop:~/Музыка$ mplayer --ao=alsa:device=hw=0.0 0.mp3
MPlayer2 2.0-728-g2c378c7-2ubuntu3 (C) 2000-2012 MPlayer Team
Cannot open file '/home/meklon/.mplayer/input.conf': No such file or directory
Failed to open /home/meklon/.mplayer/input.conf.
Cannot open file '/etc/mplayer/input.conf': No such file or directory
Failed to open /etc/mplayer/input.conf.

Playing 0.mp3.
Detected file format: MP2/3 (MPEG audio layer 2/3) (libavformat)
[mp3 @ 0x7f43bdf90b40]max_analyze_duration 5000000 reached
[mp3 @ 0x7f43bdf90b40]Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: audio (mp3), -aid 0
Clip info:
 album_artist: Emma Chapplin
 track: 17
 title: Spente Le Stelle (Live Version)
 artist: Emma Shapplin
 album: Forever Gold
 genre: Classical
 date: 2000
Load subtitles in .
Selected audio codec: MPEG 1.0/2.0/2.5 layers I, II, III [mpg123]
AUDIO: 44100 Hz, 2 ch, s16le, 320.0 kbit/22.68% (ratio: 40000->176400)
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A: 6.5 (06.5) of 334.7 (05:34.7) 0.4%

Devices list output and screeshot of alsamixer in attachment:
meklon@meklon-desktop:~/Музыка$ aplay -L
default
    Playback/recording through the PulseAudio sound server
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
sysdefault:CARD=PCH
    HDA Intel PCH, ALC1150 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Front speakers
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Digital
    IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Direct sample mixing device
dmix:CARD=PCH,DEV=1
    HDA Intel PCH, ALC1150 Digital
    Direct sample mixing device
dsnoop:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Direct sample snooping device
dsnoop:CARD=PCH,DEV=1
    HDA Intel PCH, ALC1150 Digital
    Direct sample snooping device
hw:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Direct hardware device without any conversions
hw:CARD=PCH,DEV=1
    HDA Intel PCH, ALC1150 Digital
    Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Hardware device with all software conversions
plughw:CARD=PCH,DEV=1
    HDA Intel PCH, ALC1150 Digital
    Hardware device with all software conversions
hdmi:CARD=HDMI,DEV=0
    HDA ATI HDMI, HDMI 0
    HDMI Audio Output
dmix:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Direct sample mixing device
dsnoop:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Direct sample snooping device
hw:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Direct hardware device without any conversions
plughw:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Hardware device with all software conversions

meklon@meklon-desktop:~/Музыка$ aplay -l
**** Список PLAYBACK устройств ****
карта 0: PCH [HDA Intel PCH], устройство 0: ALC1150 Analog [ALC1150 Analog]
  Подустройства: 1/1
  Подустройство №0: subdevice #0
карта 0: PCH [HDA Intel PCH], устройство 1: ALC1150 Digital [ALC1150 Digital]
  Подустройства: 1/1
  Подустройство №0: subdevice #0
карта 1: HDMI [HDA ATI HDMI], устройство 3: HDMI 0 [HDMI 0]
  Подустройства: 1/1
  Подустройство №0: subdevice #0