Yes sorry about that, jackstart -R -d alsa I think with Jackd I don't get realtime: registered builtin port type 32 bit float mono audio required capabilities not available capabilities: = loading driver .. new client: alsa_pcm, id = 1 type 1 @ 0x8055830 fd = -1 creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit control device hw:0 configuring for 48000Hz, period = 1024 frames, buffer = 2 periods Couldn't open hw:0 for 32bit samples trying 24bit instead Couldn't open hw:0 for 24bit samples trying 16bit instead Couldn't open hw:0 for 32bit samples trying 24bit instead Couldn't open hw:0 for 24bit samples trying 16bit instead new buffer size 1024 JACK: unable to mlock() port buffers: Operation not permitted registered port alsa_pcm:capture_1, offset = 4096 registered port alsa_pcm:capture_2, offset = 8192 registered port alsa_pcm:playback_1, offset = 0 registered port alsa_pcm:playback_2, offset = 0 ++ jack_rechain_graph(): client alsa_pcm: internal client, execution_order=0. -- jack_rechain_graph() cannot set thread to real-time priority (FIFO/20) (1: Operation not permitted) no realtime watchdog thread cannot use real-time scheduling (FIFO/10) (1: Operation not permitted) 2401 waiting for signals load = 0.0516 max usecs: 22.000, spare = 21311.000 But I can with JAckstart #jackstart -v -R -d alsa registered builtin port type 32 bit float mono audio capabilities: = cap_setpcap,cap_ipc_lock,cap_sys_nice,cap_sys_resource+eip loading driver .. new client: alsa_pcm, id = 1 type 1 @ 0x8055830 fd = -1 creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit control device hw:0 configuring for 48000Hz, period = 1024 frames, buffer = 2 periods Couldn't open hw:0 for 32bit samples trying 24bit instead Couldn't open hw:0 for 24bit samples trying 16bit instead Couldn't open hw:0 for 32bit samples trying 24bit instead Couldn't open hw:0 for 24bit samples trying 16bit instead new buffer size 1024 registered port alsa_pcm:capture_1, offset = 4096 registered port alsa_pcm:capture_2, offset = 8192 registered port alsa_pcm:playback_1, offset = 0 registered port alsa_pcm:playback_2, offset = 0 ++ jack_rechain_graph(): client alsa_pcm: internal client, execution_order=0. -- jack_rechain_graph() 2490 waiting for signals load = 0.0820 max usecs: 35.000, spare = 21298.000 I should add that alsaplayer is going through jack, from best I can tell - I am getting audio from it, and the "alsaplayer -o jack" command didn't produce a "Failed to load output plugin "jack". Trying defaults." reply yes, and I'm having the same problems This seems possible, perhaps alsaplayer doesn't try to make use of the tmpdir? jackstart -V back from read, ret = 1 errno == Success jackd version 0.98.1 default tmp directory: /tmp Realtime is realtime-lsm-0.1.1 realtime 10128 0 Jun 1 19:07:05 localhost kernel: Realtime Capability LSM exiting Jun 1 19:14:37 localhost kernel: Realtime LSM enabling all capabilities Jun 1 19:14:37 localhost kernel: Realtime LSM initialized (group 101, Is there any other info I can provide that might help? Thanks, -G.