[LAU] issue with jackd and USB mouse

Hi all, Jackd does not start if an USB mouse is plugged into my laptop. I am using an USB Audio card (Alesis IO|2) Some infos: Laptop is a Toshiba Satellite A660 Distribution is Ubuntu Linux 11.04 $ uname -a Linux jaco 2.6.38-8-lowlatency-pae #42+all1~lucid1-Ubuntu SMP PREEMPT Fri Apr 29 03:15:36 UTC 2011 i686 GNU/Linux $ lspci | grep USB 00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) $ lsusb Bus 002 Device 005: ID 046d:c03e Logitech, Inc. Premium Optical Wheel Mouse Bus 002 Device 004: ID 13b2:0008 Bus 002 Device 002: ID 8087:0020 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 004: ID 04f2:b1e4 Chicony Electronics Co., Ltd Bus 001 Device 002: ID 8087:0020 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub jackd error when an USB mouse is plugged in; $ jackd -d alsa -d hw:1 -r 44100 jackdmp 1.9.7 Copyright 2001-2005 Paul Davis and others. Copyright 2004-2011 Grame. jackdmp comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details no message buffer overruns no message buffer overruns JACK server starting in realtime mode with priority 10 control device hw:1 control device hw:1 audio_reservation_init Acquire audio card Audio1 creating alsa driver ... hw:1|hw:1|1024|2|44100|0|0|nomon|swmeter|-|32bit control device hw:1 configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2 periods ALSA: final selected sample format for capture: 24bit little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 24bit little-endian ALSA: use 2 periods for playback ALSA: could not start playback (Broken pipe) Cannot start driver JackServer::Start() failed with -1 Failed to start server control device hw:1 Released audio card Audio1 audio_reservation_finish control device hw:1 The same command, without mouse, just works, Any ideas ? Thank you -- Carlo Ascani | www.carloratm.org skype: carloratm cell: 3202915799