Hello, I decided to give the voluntary preempt patch a try, so I just build a 2.6.9-rc3-mm3-VP-T3 kernel. But when I try to run the latency-test I run into the following problems: First of all, a simple-to-fix compile error in showtrace.c, caused by a missing " while ((c = getopt(argc, argv, "k:hpr:)) != -1) { while ((c = getopt(argc, argv, "k:hpr:")) != -1) { Now, I run as root, I create /dev/midi0, and I load the latency-test module mknod /dev/midi0 c 35 0 modprobe latency-test but if I configure (default) to use /dev/midi0, I get: error opening device Using rtc instead doesn't work either: error setting freq 1024 (the error is: Inappropriate ioctl for device) I searched a bit in the archives, and found mention of these problems, but no solution... And just an observation, the default wakeup_count=2 fails, because if (use_rtc && wakeup_count != 1) Any suggestion? Maarten