I have the same problem with Pulseaudio blocking access to the soundcard, so jackd does not work from the box.
Jackd error output: Tue Feb 26 20:01:59 2013: Starting jack server... Tue Feb 26 20:01:59 2013: JACK server starting in realtime mode with priority 10 Tue Feb 26 20:01:59 2013: [1m[31mERROR: Cannot lock down 82274202 byte memory area (Cannot allocate memory)[0m 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 Tue Feb 26 20:01:59 2013: control device hw:0 Tue Feb 26 20:01:59 2013: control device hw:0 Tue Feb 26 20:01:59 2013: [1m[31mERROR: Failed to acquire device name : Audio0 error : Method "RequestRelease" with signature "i" on interface "org.freedesktop.ReserveDevice1" doesn't exist [0m Tue Feb 26 20:01:59 2013: [1m[31mERROR: Audio device hw:0 cannot be acquired...[0m Tue Feb 26 20:01:59 2013: [1m[31mERROR: Cannot initialize driver[0m Tue Feb 26 20:01:59 2013: [1m[31mERROR: JackServer::Open failed with -1[0m Tue Feb 26 20:01:59 2013: [1m[31mERROR: Failed to open server[0m Tue Feb 26 20:02:00 2013: Saving settings to "/home/haaken/.config/jack/conf.xml" ... 20:02:11.229 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 20:10:31.231 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 Tue Feb 26 20:10:30 2013: Starting jack server... Tue Feb 26 20:10:31 2013: JACK server starting in realtime mode with priority 10 Tue Feb 26 20:10:31 2013: [1m[31mERROR: Cannot lock down 82274202 byte memory area (Cannot allocate memory)[0m Tue Feb 26 20:10:31 2013: control device hw:0 Tue Feb 26 20:10:31 2013: control device hw:0 Tue Feb 26 20:10:31 2013: [1m[31mERROR: Failed to acquire device name : Audio0 error : Method "RequestRelease" with signature "i" on interface "org.freedesktop.ReserveDevice1" doesn't exist [0m Tue Feb 26 20:10:31 2013: [1m[31mERROR: Audio device hw:0,4 cannot be acquired...[0m Tue Feb 26 20:10:31 2013: [1m[31mERROR: Cannot initialize driver[0m Tue Feb 26 20:10:31 2013: [1m[31mERROR: JackServer::Open failed with -1[0m Tue Feb 26 20:10:31 2013: [1m[31mERROR: Failed to open server[0m Tue Feb 26 20:10:33 2013: Saving settings to "/home/haaken/.config/jack/conf.xml" ... 20:10:36.416 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 20:14:37.491 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 Tue Feb 26 20:14:37 2013: Starting jack server... Tue Feb 26 20:14:37 2013: JACK server starting in realtime mode with priority 10 Tue Feb 26 20:14:37 2013: [1m[31mERROR: Cannot lock down 82274202 byte memory area (Cannot allocate memory)[0m Tue Feb 26 20:14:37 2013: control device hw:0 Tue Feb 26 20:14:37 2013: control device hw:0 Tue Feb 26 20:14:37 2013: [1m[31mERROR: Failed to acquire device name : Audio0 error : Method "RequestRelease" with signature "i" on interface "org.freedesktop.ReserveDevice1" doesn't exist [0m Tue Feb 26 20:14:37 2013: [1m[31mERROR: Audio device hw:0,4 cannot be acquired...[0m Tue Feb 26 20:14:37 2013: [1m[31mERROR: Cannot initialize driver[0m Tue Feb 26 20:14:37 2013: [1m[31mERROR: JackServer::Open failed with -1[0m Tue Feb 26 20:14:37 2013: [1m[31mERROR: Failed to open server[0m Tue Feb 26 20:14:38 2013: Saving settings to "/home/haaken/.config/jack/conf.xml" ... 20:14:41.599 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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/480103 Title: Pulseaudio not working while jackd is running To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/jack-audio-connection-kit/+bug/480103/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs