Video playback stops after a few seconds / VAAPI bug ?

Hydrosaure · April 15, 2020 at 8:52 AM

Issue is present in both official 9.2.2 binaries and self build from master

Code

LibreELEC (community): devel-20200414225037-837464c (Generic.x86_64)
LibreELEC:~ # cat /proc/version
Linux version 5.6.0 (hydro@ubuntu) (gcc version 9.3.0 (GCC)) #1 SMP Tue Apr 14 23:12:49 CEST 2020

The test is simply booting off installation media in live mode and playing a 1080p file from local SSD (ie. a saved YouTube video): payback starts fine but after a few seconds video freezes (interface and controls still work) and Kodi binary starts pegging 100% of one core:

Code

LibreELEC:~ # top
top - 07:02:41 up 2 min,  1 user,  load average: 1.90, 0.77, 0.29
Tasks: 113 total,   3 running, 110 sleeping,   0 stopped,   0 zombie
%Cpu(s): 51.9 us,  1.2 sy,  0.7 ni, 43.3 id,  3.0 wa,  0.0 hi,  0.0 si,  0.0 st
MiB Mem :   7340.1 total,   6674.0 free,    239.7 used,    426.4 buff/cache
MiB Swap:      0.0 total,      0.0 free,      0.0 used.   6899.9 avail Mem

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
   1036 root      20   0 1529392 224100  67084 R 106.6   3.0   1:41.94 /usr/lib/kodi/kodi.bin --standalone -fs
   1004 root      20   0  433284  19916  12940 S   0.7   0.3   0:01.45 /usr/bin/Xorg -nolisten tcp vt01 -s 0 -noreset -allowMou+
      1 root      20   0   90564   7164   5504 S   0.0   0.1   0:00.74 /usr/lib/systemd/systemd
    598 root       0 -20       0      0      0 D   0.3   0.0   0:00.37 [kworker/u5:2+i915_flip]
      5 root      20   0       0      0      0 I   0.3   0.0   0:00.29 [kworker/0:0-events]
    153 root      20   0       0      0      0 I   0.0   0.0   0:00.23 [kworker/u4:5-events_unbound]
    154 root      20   0       0      0      0 I   0.3   0.0   0:00.19 [kworker/u4:6-events_unbound]

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Playback hardware is a Pentium G3258 with HD Graphics.

Hydrosaure · April 15, 2020 at 10:20 AM

Same behavior in official 9.0.2 build.

Works perfectly fine on 8.2.5.

**Klojum** · April 15, 2020 at 10:48 AM Official Post

Gotta start somewhere, might as well be with a full kodi log file.

Please provide a full debug log.

How to post a log (wiki)

1. Enable debugging in Settings>System Settings>Logging
2. Restart Kodi
3. Replicate the problem
4. Generate a log URL (do not post/upload logs to the forum)

use "Settings > LibreELEC > System > Paste system logs" or run "pastekodi" over SSH, then post the URL link

Hydrosaure · April 15, 2020 at 11:48 AM

Okay I think I found the issue:

I was testing with my audio system off and apparently having the default audio output pointing to the wrong output device causes something to be stuck in a loop that ends up blocking video playback.

Here is an attached debug log with 1st playback working fine when using audio device hdmi:CARD=HDMI,DEV=1 "ABT iScan Duo on HDMI #1"

and secondly, reproducing the issue, when playing back while having audio device set to hdmi:CARD=HDMI,DEV=0 "HDMI #0"

Download link
WeTransfer

1 item

01_KODI.log 974 KB

Video playback stops after a few seconds / VAAPI bug ?

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