[LAU] Outputs on Focusrite Scarlett 18i6 not working

Hi, i'm Ílson Bolzan, from Brazil. I'm having problems with my interface, and i'm not sure if they are because of alsa, or jack. The inputs are working fine, but they only work when i'm using the interface in "Audio: Capture Only" otherwise i get the error bellow I've also run alsa-info script, the result can be found in: http://www.alsa-project.org/db/?f=03cc8c5c30232dfdbcd2b86ad8be4f609933d8c1 Can you point if i'm missing something? Thank you so much for your time. --------------------------------------------------------------- 00:20:59.553 Patchbay deactivated. 00:20:59.567 Statistics reset. 00:20:59.572 ALSA connection change. 00:20:59.577 D-BUS: Service is available (org.jackaudio.service aka jackdbus). Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock 00:21:07.014 D-BUS: JACK server could not be started. Sorry Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock Fri Jul 10 00:21:06 2015: Starting jack server... Fri Jul 10 00:21:06 2015: JACK server starting in realtime mode with priority 10 Fri Jul 10 00:21:06 2015: self-connect-mode is "Don't restrict self connect requests" Fri Jul 10 00:21:06 2015: Acquired audio card Audio1 Fri Jul 10 00:21:06 2015: creating alsa driver ... hw:USB|hw:USB|1024|2|44100|0|0|hwmon|hwmeter|-|32bit Fri Jul 10 00:21:06 2015: Using ALSA driver USB-Audio running on card 1 - Focusrite Scarlett 18i6 USB at usb-0000:03:00.0-2, high speed Fri Jul 10 00:21:06 2015: configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2 periods Fri Jul 10 00:21:06 2015: ALSA: final selected sample format for capture: 32bit integer little-endian Fri Jul 10 00:21:06 2015: ALSA: use 2 periods for capture Fri Jul 10 00:21:06 2015: ALSA: final selected sample format for playback: 32bit integer little-endian Fri Jul 10 00:21:06 2015: ALSA: use 2 periods for playback Fri Jul 10 00:21:06 2015: ERROR: ALSA: cannot set hardware parameters for playback Fri Jul 10 00:21:06 2015: ERROR: ALSA: cannot configure playback channel Fri Jul 10 00:21:06 2015: ERROR: Cannot initialize driver Fri Jul 10 00:21:06 2015: ERROR: JackServer::Open failed with -1 Fri Jul 10 00:21:07 2015: ERROR: Failed to open server 00:21:09.039 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info. Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock Fri Jul 10 00:21:08 2015: Saving settings to "/home/ilson/.config/jack/conf.xml" ... --------------------------------------------------------------------