[SOLVED] Sound drop outs and stuttering with I2S DAC connected.

xbianonpi / xbian

XBMC on Raspberry Pi, Bleeding Edge

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[SOLVED] Sound drop outs and stuttering with I2S DAC connected. #732

Closed coderpop closed 9 years ago

coderpop commented 9 years ago

Hi,

With XBMC 13.2 there was no problem, but with Kodi 14.2 (with the latest updates and upgrades to todays date) there is a problem with this.

The sound will blank for short periods, sometimes longer and sometimes shorter. It seems to get worse the longer a track is played.

I have noticed that a way to make the issue to appear is to simply move the mouse around the screen. This is repeatable. Also, scanning in a network directory to the library will also cause the problem.

If I start a track and then don't touch the mouse or the library scanning is stopped, then it is OK (from limited testing today)......

Hope someone can look into this and come up with a solution as others are reporting similar problems on the xbian forum.

coderpop commented 9 years ago

Just to add that the hardware acceleration for video doesn't help and it's not that the songs carry on playing and the sound goes off, the song is actually pausing for short intervals. I'll try and generate a log and post if it helps (where to post though?).

coderpop commented 9 years ago

Update...

Setting overclock from 'xbian' to 'high' has helped, but navigating menus still causes the sound to drop out, sometimes for many seconds at a time.

mkreisl commented 9 years ago

@coderpop Did you have the dynamic priority feature enabled? If yes, could you turn it off and test again.

coderpop commented 9 years ago

Hi,

Yes DP was on (must be the default setting as I never touched it). Turning it off and rebooting and testing again, it is better, but not fixed. For example I tried with a streaming radio source to avoid any problems at my server and when I went to open the music menus to play a flac file the sound blanked out for a while. Then, with the radio stream still running I scrolled up and down the artists menu and it stutters like hell. I hope this helps narrow down the problem.

f1vefour commented 9 years ago

@mkreisl When was the firmware last updated?

coderpop commented 9 years ago

uname -a Linux lounge 3.18.8+ #1 PREEMPT Thu Mar 5 03:43:34 CET 2015 armv6l GNU/Linux

I hope this helps!

mkreisl commented 9 years ago

@coderpop

Turning it off and rebooting and testing again, it is better, but not fixed

Ok, let's make a further test: 1 make sure that the variable DPRIORITY is set to no in /etc/default/xbmc 2 1. is not enough to turn of DP completely. Unfortunately, kodi.bin will be launched with priority 49 and it will newer changed later. So, to turn it completely off you have to modify the file /etc/init/xbmc.conf. Please change the line exec schedtool -R -p 49 -e sudo -u $USER -g $GROUP -s $DAEMON $DAEMON_ARGS $DAEMON_LIRC $DEBUG 2>&1 | grep -v ES30 || : to sudo -u $USER -g $GROUP -s $DAEMON $DAEMON_ARGS $DAEMON_LIRC $DEBUG 2>&1 || : and run a new test.

On my RPi1, if DPRIORITY=yes, Kodi will catch all CPU an this results in no responding of background tasks or ssh sessions in some circumstances, like scrolling in menus or open the weather-addon

coderpop commented 9 years ago

mkreisl,

You, Sir, are a genious! :)

I can confirm that on the one pi I tested this did the trick. No more stuttering sounds no matter what I do!

I admit that I don't understand what it all means, but I am very happy about this!

Thank You!