Intermitant problems with headless + Pisound - Jackaudio XRUNs

Using Zynthian
1

I am getting Jack audio XRUNS when the Zynthian starts up. Sometimes the XRUNs stop happening As in the log below); sometimes they keep going (not shown). I’ve attached some logs below if anyone has any insights.
Thanks
Harry

UI Log

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– Logs begin at Thu 2019-02-14 10:11:58 GMT. –
Sep 24 21:43:17 zynthian startx[555]: ZynCore->setup_zyncoder(3, 0, 0): Can’t configure zyncoder on a single pin!
Sep 24 21:43:19 zynthian startx[555]: Started libzynmixer
Sep 24 21:43:19 zynthian startx[555]: Started libzynseq
Sep 24 21:43:32 zynthian startx[555]: libzynaudioplayer initialised
Sep 24 21:43:32 zynthian startx[555]: Started libzynsmf
Sep 24 21:43:32 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(0, …): Invalid index!
Sep 24 21:43:32 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(1, …): Invalid index!
Sep 24 21:43:32 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(2, …): Invalid index!
Sep 24 21:43:32 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(3, …): Invalid index!
Sep 24 21:43:32 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(3, …): Invalid index!
Sep 24 21:43:35 zynthian startx[555]: ZynMidiRouter: Bad input port index (254).
Sep 24 21:43:35 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(0, …): Invalid index!
Sep 24 21:43:35 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(1, …): Invalid index!
Sep 24 21:43:35 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(2, …): Invalid index!
Sep 24 21:43:35 zynthian startx[555]: ZynCore->setup_behaviour_zyncoder(3, …): Invalid index!
Sep 24 21:44:00 zynthian startx[555]: WARNING:zynthian_autoconnect.cb_jack_xrun: Jack Audio XRUN! => delayed 0.0us
Sep 24 21:44:00 zynthian startx[555]: WARNING:zynthian_autoconnect.cb_jack_xrun: Jack Audio XRUN! => delayed 0.0us
Sep 24 21:44:00 zynthian startx[555]: WARNING:zynthian_autoconnect.cb_jack_xrun: Jack Audio XRUN! => delayed 0.0us
Sep 24 21:44:00 zynthian startx[555]: WARNING:zynthian_autoconnect.cb_jack_xrun: Jack Audio XRUN! => delayed 0.0us
Sep 24 21:44:00 zynthian startx[555]: WARNING:zynthian_autoconnect.cb_jack_xrun: Jack Audio XRUN! => delayed 0.0us
Sep 24 21:44:00 zynthian startx[555]: WARNING:zynthian_autoconnect.cb_jack_xrun: Jack Audio XRUN! => delayed 0.0us

SOFTWARE

zyncoder: stable (83acc8b)
zynthian-ui: stable (3ce8a5e)
zynthian-sys: stable (37e06cc)
zynthian-data: stable (1321e5d)
zynthian-webconf: stable (f7d0f1e)

HARDWARE

Raspberry Pi 4 Model B Rev 1.5
Audio: PiSound
Display: Generic HDMI Display
Wiring: DUMMIES
I2C: Not detected
Profile: v4_stage

2

Hi @harrylnorris

Is this always from a fresh power-on (boot) or is it from a software restart? The latter is known to cause xrun problems.

What is your hardware and software (firmware versions)? These can have significant impact on performance.

3

Hardware & software versions are given in the original post - PI 4B and latest stable. After reading some past emails on similar issues, I limited USB to 12mbs and this seemed to lessen the problem but I hadn’t really been paying attention to whether there was a difference between power-up and reboot. Thanks for the pointer - I’ll look into it.

Harry