jack can't start midi because of wrong permissions. Here are the result of ls -l on /dev/snd drwxr-xr-x 2 root root 60 mai 30 18:52 by-path/ crw-rw----+ 1 root audio 116, 5 mai 30 18:52 controlC0 crw-rw----+ 1 root audio 116, 4 mai 30 18:52 hwC0D0 crw-rw----+ 1 root audio 116, 3 mai 30 20:27 pcmC0D0c crw-rw----+ 1 root audio 116, 2 mai 30 20:27 pcmC0D0p crw-rw---- 1 root audio 116, 1 mai 30 18:52 seq crw-rw----+ 1 root audio 116, 33 mai 30 18:52 timer To be able to start jack with midi connection, I do a chmod a+rw as a root user. This hack is temporary because when I reboot linux I must do this step again.
I tested ACL: [collette@localhost ~]$ getfacl /dev/snd/seq getfacl : suppression du premier « / » des noms de chemins absolus # file: dev/snd/seq # owner: root # group: audio user::rw- group::rw- other::--- [collette@localhost ~]$ getfacl /dev/snd/timer getfacl : suppression du premier « / » des noms de chemins absolus # file: dev/snd/timer # owner: root # group: audio user::rw- user:collette:rw- group::rw- mask::rw- other::--- If I plug a midi keyboard in the usb plug, the permission are still the same and I still can't start qjackctl. After a "touch /dev/snd/seq" as a root user: [collette@localhost ~]$ getfacl /dev/snd/seq getfacl : suppression du premier « / » des noms de chemins absolus # file: dev/snd/seq # owner: root # group: audio user::rw- user:collette:rw- group::rw- mask::rw- other::---
another workaround is to add you in the audio group
the 'audio' group is not available is userdrake. I finally managed to find the good command in command line: usermod -a -G audio collette I will disconnect from my session and see if this command solve the problem.
Works for me. But somebody must add 'audio' group to userdrake to ease the process of adding a user to this group. YC
Status: NEW => RESOLVEDResolution: (none) => FIXED
hum strange I have it in mga1, will check more.
And I confirm that it's also available in mga2 for me.