Gustin Johnson wrote: > Two things. > > First, are you sure that jack is trying to use the correct sound device? > This line seems to indicate that either you are using the incorrect > device or you have an application that is blocking jack: > > ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to > capture-only mode > cannot load driver module alsa
Okay, this is the message that often comes after rebooting after something crashed. After a reboot there can't be any application block jackd. Or can there be an application after startup doing this? I'll set /etc/modprobe.d/alsa-base to give the devices consistent numbers. I'll set it to # Fix indexes for the spymo DAW alias snd-card-0 snd-ice1712 options snd-ice1712 index=0 alias snd-card-1 snd-usb-audio options snd-usb-audio index=1 After booting, when there was no crash before, the Envy24 card will always be hw:0 and the USB MIDI IO will always be hw:1, but it might be more safe to fix the indexes. I'm not sure if the USB device was hw:0, instead of the TerraTec, that should be hw:0. > Second, you may have your timings set too aggressively for your hardware. > > I have seen this error many times before and it has always been a > configuration error on my part. The error above or the error for the crash with MusE? Are Envy24 cards not fine with Linux? I often read that latencies should be better with Linux as with Windows. I set it to 128 / 2 @ 48000Hz because of the sync problems and MIDI jitter, only set to this the sync and jitter is okay. I can increase it, I'm fine with higher latency and sync and jitter might be fine with increased values after installing a NVidia, I'm still using the on-board ATI. If I'll increase the values at the moment, I'll have to bad sync and to much MIDI jitter. MIDI jitter seems to collaborate somehow with the audio settings. Anyway, I'll try to increase it and will live with jitter for the moment. I never run into trouble when Rosegarden is playing some Fluidsynth DSSIs and QSampler. Crashes for Rosegarden or QSampler only will happen, if I'm editing with the mouse or playing events by the USB MIDI in. I can't say much about MusE. What settings should I try for jackd? 256 / 2, 128 / 3 or much higher settings? I've got no XRUNS or unwanted noise when set to 128 / 2. Everything seems to be fine with lower settings, but I won't get lower, because this is suspect. Okay, I'll set the values higher, but can this really be the reason for the crashes I get? Shouldn't there be XRUNS and destroyed sound before crashes? Thank you, Ralf
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