[LAU] Which kernel do you use?

I've get a new (used) mobo, and played with the kernel version to use. So far I've tested all from 3.19.0-rc5 down to 3.4.104 Those, were rt-patches available I test as rt-kernel. Best results, I only get with the 3.4 series, all later kernels introduce Xruns here, sporadic, unrelated to the dsp load, even, when just jack is running. I build then all with the same configuration, play a bit with configurations deselect hyper-threading on the latest kernels, use threadedirqs, all to no avail. Only 3.4.xxx-rt kernel run absolute smooth. So, which kernels with witch configuration do you all use? System: Host: box Kernel: 3.4.105-rt129 x86_64 (64 bit gcc: 4.9.2) Desktop: Cinnamon 2.2.16 (Gtk 3.14.5) dm: lightdm Distro: siduction 14.1.0 Indian Summer - cinnamon - (201411230307) Machine: Mobo: Intel model: DG965MQ v: AAD37419-302 Bios: Intel v: MQ96510J.86A.1250.2006.1005.1532 date: 10/05/2006 CPU: Quad core Intel Core2 Quad Q6600 (-MCP-) cache: 4096 KB flags: (lm nx sse sse2 sse3 ssse3 vmx) bmips: 19200 clock speeds: min/max: 1596/2394 MHz 1: 2394 MHz 2: 2394 MHz 3: 2394 MHz 4: 2394 MHz Graphics: Card: NVIDIA GT216 [GeForce GT 220] bus-ID: 01:00.0 chip-ID: 10de:0a20 Display Server: X.Org 1.16.1.901 drivers: nouveau (unloaded: fbdev,vesa) Resolution: 1600x900(a)59.98hz GLX Renderer: Gallium 0.4 on NVA5 GLX Version: 3.0 Mesa 10.3.2 Direct Rendering: Yes Audio: Card-1 NVIDIA GT216 HDMI Audio Controller driver: snd_hda_intel bus-ID: 01:00.1 chip-ID: 10de:0be2 Card-2 Creative Labs SB Audigy driver: snd_emu10k1 port: 1000 bus-ID: 07:00.0 chip-ID: 1102:0004 Sound: Advanced Linux Sound Architecture v: 1.0.25 Drives: HDD Total Size: 164.7GB (26.4% used) ID-1: /dev/sda model: HDT722516DLA380 size: 164.7GB serial: VDK71CTCEBBN5X