[LAU] Focusrite Scarlett 8i6 recognised, inputs work, but no output - Mint 18

ycollette.nospam at free.fr ycollette.nospam at free.fr
Tue Aug 9 15:55:19 UTC 2016

I have met the same problem with the Scarlett 18i8.
Some times, I have inputs and outputs level. But some time, the input is ok but no outputs. If I restart the Scarlett soundcard (I turn off the power) then, most of the time, the output level is back.
Some times, the level seems to be a little bit low, but the balance is not OK (everything is on the left or on the right). After a restart, everything is back.
2 times out of 3, the sound card works fine.
I use Fedora 24 with a RT kernel from CCRMA.

----- Mail original -----
De: "Marco Donnarumma" <lists at marcodonnarumma.com>
À: "linux-audio-user" <linux-audio-user at lists.linuxaudio.org>
Envoyé: Mardi 9 Août 2016 17:48:48
Objet: [LAU] Focusrite Scarlett 8i6 recognised, inputs work,	but no output - Mint 18

Dear all, 

I have been using my Focusrite Scarlett 8i6 for a couple of years without issues on a Linux Mint 17 laptop. I can use the sound card only via Qjackctl (no ALSA out of the box). 

Now, I have a new computer (shuttle xpc slim) on which I installed Linux Mint 18. 
The sound card is recognised by both Jack and cat /proc/asound/cards. 
It even correctly appears in the system sound preferences, which did not happen in Mint 17. 

However, while the inputs work, there's no output. I've tested with a bunch of audio software, such as Pd, Ardour, Hydrogen, etc.. 

Interestingly, if, immediately after testing with Mint 18, I plug the sound card back to my Mint 17 laptop, at first, the sound card does not produce output. I have to power off the sound card and re-plug it, then it works. 

I would need this to work only with Jack, I'm not looking for an ALSA fix. 

I know in the past three years there has been a few ALSA patches to make this range of Focusrite work, and I think most of those patches are now in the mainline kernel. Although I'm not familiar with this. 

Does anything I could try come to mind? 

Mint 18 
kernel: 4.4.0-31-lowlatency 

alsa-base 1.0.25 

libasound, etc.. 1.1.0 

thanks in advance! 

best wishes, 

Marco Donnarumma, Ph.D 

Performing bodies, sound and machines 
Universität der Künste Berlin 


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