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(a)marcodonnarumma.com> À: "linux-audio-user" <linux-audio-user(a)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? [SYSTEM INFO] 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 http://marcodonnarumma.com 4w33534643646 -- _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-user

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? [SYSTEM INFO] 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

With my Scarlett 18i8, I also found that an internal parameter was set to off: amixer list all the parameters of the soundcard (the scarlett was the second one): $ amixer --card 2 contents | more numid=5,iface=MIXER,name='Master 1 (Monitor) Playback Switch' ; type=BOOLEAN,access=rw------,values=2 : values=off,off numid=6,iface=MIXER,name='Master 1 (Monitor) Playback Volume' ; type=INTEGER,access=rw---R--,values=2,min=0,max=134,step=1 : values=128,128 | dBscale-min=-1 ... Here, I saws: "Playback Switch" ... values=off,off. Via another amixer command, I set the parameter to on, and the sound was back ... $ amixer --card 2 cset numid=5 1 numid=5,iface=MIXER,name='Master 1 (Monitor) Playback Switch' ; type=BOOLEAN,access=rw------,values=2 : values=on,on ----- Mail original ----- De: "Marco Donnarumma" <lists(a)marcodonnarumma.com> À: "alessio degani" <alessio.degani(a)ymail.com> Cc: "linux-audio-user" <linux-audio-user(a)lists.linuxaudio.org> Envoyé: Mardi 9 Août 2016 20:46:02 Objet: Re: [LAU] Focusrite Scarlett 8i6 recognised, inputs work, but no output - Mint 18 Hi Alessio, thanks for the tip. I had already made sure volumes are up in the alsamixer, just doubled checked now and can't see anything wrong. jack doesn't give me any error. Interesting that you have it working on Ubuntu 14.10, 'cause that distro release is the same behind Mint 17 (well, Ubuntu 14.04), where my 8i6 works out of the box. I wonder if something got broken amidst the improvements to the new releases of Ubuntu 16 and the related Mint 18. I'm now downloading KXStudio iso to try it out. This is based on Ubuntu 14.04, so let's see. I'll post an update. thanks! M On 09/08/2016 17:48, Marco Donnarumma wrote: Hi Marco, I've 8i6 and I use it with Ubuntu 14.10. Sometimes I've experienced a similar issue (I don't know if it is your case or not). I've checked all the volumes with alsa mixer, and I've found that sometimes some buses (which are used for monitor out or main out) are low in volume or even mute or misrouted (i.e. not "connected" to monitor out). Unfortunately, the alsa mixer interface are not the best way to change those parameters, because the 8i6 has so many channel and buses that alsa mixer becomes confusing to use! Cheers fix. _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-user