On 02/26/2011 11:32 PM, david wrote: > Dan Capp wrote: >> Thanks Renato. But what I'm trying to do is use the "Script" in Setup >> to make QjackCtl automatically load a certain preset without me having >> to do it. The reason I want to do this is because: 1) I have QjackCtl >> set to start automatically on system startup and I also have QjackCtl >> set to "start jack server" straight away when loaded. At the moment it >> automatically loads the last preset used, so if I've been using >> "firewire" and then I shut my computer down, when I start it again >> QjackCtl loads automatically and tries to load the "firewire" >> driver/preset even when the firewire isn't connected, so I get loads >> of error messages. And 2) whilst studying the options in QjackCtl (I'm >> new to Linux audio and excited) I noticed that there seems to be the >> facility to make it load specified presets automatically and I wanted >> to try it, but it doesn't seem to work and I don't know if I'm getting >> the "meta-symbol arguments" right (I'm totally new to them). >> >> This relates to an earlier request/thread I made in LAU. It's not a >> big deal if I can't do this as it just means I need to always remember >> to manually switch QjackCtl to my "alsa" preset whenever I turn my >> firewire device off so that it doesn't ever try and load "firewire" >> when the device isn't there, like you said. I just hate error messages >> and I like automation - some kind of Obsessive Compulsive thing I have >> maybe ;). It just seems like QjackCtl offers an easy solution to my >> problem and I'm not using it right. > > Hmm, maybe make a script that checks to see if firewire device is > connected. If true, it starts JACK with the firewire backend, otherwise, > it starts with your ALSA backend. Maybe you could run that script on > startup. Here's such a script. It's ripped off http://rg42.org/wiki/jack2contol and uses 'dbus' to control a running qjackctl instance. Install: 0) launch qjackctl 1) qjackctl->Setup->Misc->Enable D-Bus interface 1a) (only for jack2 with dbus enabled) add killall -9 jackdbus to qjackctl->Setup->Options->Execute script after shutdown 2) save the script below to a file and make it executable: eg. `chmod +x $HOME/bin/myqjackctl.sh` 3) modify the script according to your soundcard(s) and presets 4) run the script on each system-boot or after dis/connecting the external card. 5) note that this works, but that it's not an elegant solution :-p 5a) stay tuned for http://rg42.org/blog/jack2dbus ---------------------8<----------------------- #!/bin/sh ## stop jackd dbus-send --system /org/rncbc/qjackctl org.rncbc.qjackctl.stop sleep 1 ## default qjackctl preset: "intel" PRESET="intel" ## try to detect USB-UA25 -> qjackctl preset "ua25" grep "UA25" /proc/asound/cards >/dev/null && PRESET="ua25" ## change qjackctl's preset dbus-send --system /org/rncbc/qjackctl \ org.rncbc.qjackctl.preset string:$PRESET ## tell qjackctl to start jackd dbus-send --system /org/rncbc/qjackctl org.rncbc.qjackctl.start ---------------------8<----------------------- ciao, robin _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
