[_phantom_]

hi all,
my system (HTPC) runs Ubuntu 14.04 with PulseAudio disabled, just ALSA in favor of Kodi.
my surround decoder is an AVR, and HTPC is connected to AVR over S/PDIF. sound configuration is passthrough.
above setup has been flawless with Kodi 14, however only passthrough surround audio (DTS or Dolby) started stuttering annoyingly after automatic Isengard upgrade.
i have multichannel music material as WAVE, FLAC, AC3 and DTS audio files. same audio stutter problem occurs.
I re-installed PulseAudio, experimented with different output configurations (fixed/best/optimized) and different sampling rate limits (44.1/48/88.2/96/192), however failed to remove stutter.
stereo sound works perfect.
what should i do? is this a bug to be reported?

[fritsch]

For now it's your bug - as you did not provide anything the "Read this before posting" thread wants from you.

[_phantom_]

sorry for the inconvenience. below are the details;

OS: Ubuntu 14.04.3 64-bit
Kernel Version: 3.13.0-61-generic x86_64
Hardware: CPU is an Intel Haswell with integrated GPU, no external GPU. sound interface is a F/O SPDIF, with the onboard sound chip.
Install Method: PPA
GIT revision: 2f34a0c (Kodi 15)

AV codec and container: A transport stream (TS) file, mediainfo output is as follows.

General
ID : 0 (0x0)
Format : BDAV
Format/Info : Blu-ray Video
File size : 17.1 GiB
Duration : 1h 21mn
Overall bit rate mode : Variable
Overall bit rate : 30.1 Mbps
Maximum Overall bit rate : 48.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : 27
Duration : 1h 21mn
Bit rate mode : Variable
Maximum bit rate : 35.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : MBAFF
Scan order : Top Field First
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio #1
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : DTS
Format/Info : Digital Theater Systems
Format profile : MA / Core
Mode : 16
Format settings, Endianness : Big
Muxing mode : Stream extension
Codec ID : 134
Duration : 1h 21mn
Bit rate mode : Variable
Bit rate : Unknown / 1 509 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossless / Lossy

audio stutter occurs regardless of being DTS/AC-3/DTS HD-MA/Dolby True HD/hires multich FLAC. i can supply more media info regarding other multichannel files. since there is no crash, i am not providing any debug log.

[fritsch]

please click on Debug Log and post this one

Edit: As you are at, I also want: vainfo

[DaVu]

since there is no crash, i am not providing any debug log.

[fritsch]

since there is no crash, i am not providing any debug log.

Yeah :-). Your choice.

[_phantom_]

well, i checked everything and found that the F/O interconnect faulty. stutter disappeared after replacing the cable.
unfortunately, cable failure coincided with Isengard upgrade. This misled me while troubleshooting.
thank you for your interest. thread may be closed.