> When was the last time you tried it? It should work on amd64 and PPC. > You might need to disable high res timers. ive tried a few times most recently patch-2.6.13-rt4 - its never worked..have messed around with timer resolutions and 'generic x86-64' vs 'amd64' settings as well. it reboots right after grub loads the kernel, so fast that you cant even read what it says (if anything). thats with 'Complete Preemption (Real-Time)' . the 'Preemptible Kernel (Low-Latency Desktop)' option fails to compile: In file included from arch/x86_64/kernel/mce.c:17: include/linux/fs.h: In function `lock_super': include/linux/fs.h:855: warning: implicit declaration of function `down' include/linux/fs.h: In function `unlock_super': include/linux/fs.h:861: warning: implicit declaration of function `up' arch/x86_64/kernel/mce.c: In function `mce_read': arch/x86_64/kernel/mce.c:387: warning: type defaults to `int' in declaration of `DECLARE_MUTEX' arch/x86_64/kernel/mce.c:387: warning: parameter names (without types) in function declaration arch/x86_64/kernel/mce.c:396: error: `mce_read_sem' undeclared (first use in this function) arch/x86_64/kernel/mce.c:396: error: (Each undeclared identifier is reported only once arch/x86_64/kernel/mce.c:396: error: for each function it appears in.) make[1]: *** [arch/x86_64/kernel/mce.o] Error 1 make: *** [arch/x86_64/kernel] Error 2 the similar (same?) 'Preemptible Kernel (Low-Latency Desktop)' choice in vanilla sources compiles but is grossly inadequate, even with a generous 256 buffer jack is full of dropouts with even basic usage. its no big deal, im happy to boot into XP for the few occasions i need to make/record music, plus it will be decades before Samplitude runs on Linux or ardour or anything else 'free' catches up to it or Ableton-Live in terms of usability/flexibility/fun-factor... > > Lee
