[LAU] Jack X-run

Hey guys, I having a strange issue with jack, when I start Qjackctl with 256 frames/period it works fine, but when i change to 128, it starts popping Xruns with nothing connected or instantiated at all! The most strange part is that I don't even remember installing or changing anything these days and this started to happening out of nothing, it used to work fine with any frames/period. Here are some information: 14:33:19.691 /usr/bin/jackd -P1 -dalsa -r48000 -p128 -n2 -D -Chw:0 -Phw:0,0 Cannot connect to server socket err = Arquivo ou diretório não encontrado Cannot connect to server request channel jack server is not running or cannot be started 14:33:19.701 JACK was started with PID=8972. no message buffer overruns no message buffer overruns no message buffer overruns jackdmp 1.9.9 Copyright 2001-2005 Paul Davis and others. Copyright 2004-2012 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 JACK server starting in realtime mode with priority 1 control device hw:0 control device hw:0 audio_reservation_init Acquire audio card Audio0 creating alsa driver ... hw:0,0|hw:0|128|2|48000|0|0|nomon|swmeter|-|32bit control device hw:0 configuring for 48000Hz, period = 128 frames (2.7 ms), buffer = 2 periods ALSA: final selected sample format for capture: 32bit integer little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 32bit integer little-endian ALSA: use 2 periods for playback 14:33:21.909 JACK connection change. 14:33:21.910 Server configuration saved to "/home/lucas/.jackdrc". 14:33:21.912 Statistics reset. 14:33:21.916 Client activated. 14:33:21.921 JACK connection graph change. 14:33:24.068 XRUN callback (1). 14:33:25.923 XRUN callback (2 skipped). 14:33:26.058 XRUN callback (4). uname -a: Linux lucas 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3+deb7u1 x86_64 GNU/Linux jack_cpu_load during the xRuns: jack DSP load 1.602078 jack DSP load 1.654288 jack DSP load 1.559496 jack DSP load 1.579738 jack DSP load 1.520961 jack DSP load 1.560494 jack DSP load 1.541332 jack DSP load 1.459514 jack DSP load 1.545006 jack DSP load 1.515532 jack DSP load 0.983672 jack DSP load 1.566202 top: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8972 lucas 20 0 126m 88m 81m S 3,7 1,1 0:36.96 jackd I already tryed to reinstall jackd2 and relateds...