I am having trouble with zttest on a Tyan board, dual AMD Opteron's on FC3. Tried different kernels, no IRQ sharing, everything looks in order. My zaptel modules load fine, but if I run zttest, it just hangs. Below is the strace output and you can see where it stops. Anyone have any ideas? [root@asterisktest zaptel]# strace ./zttest execve("./zttest", ["./zttest"], [/* 24 vars */]) = 0 uname({sys="Linux", node="asterisktest.astroshapes.com", ...}) = 0 brk(0) = 0x502000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaaaac0000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=150975, ...}) = 0 mmap(NULL, 150975, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2aaaaaac1000 close(3) = 0 open("/lib64/tls/libc.so.6", O_RDONLY) = 3# ./zttest Opened pseudo zap interface, measuring accuracy... --- Results after 0 passes --- Best: 0.000000 -- Worst: 100.000000 -- Average: 100.000000 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p\305\1\0"..., 640) = 640 lseek(3, 624, SEEK_SET) = 624 read(3, "\4\0\0\0\20\0\0\0\1\0\0\0GNU\0\0\0\0\0\2\0\0\0\4\0\0\0"..., 32) = 32 fstat(3, {st_mode=S_IFREG|0755, st_size=1605832, ...}) = 0 mmap(NULL, 2297832, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2aaaaabc1000 mprotect(0x2aaaaace9000, 1085416, PROT_NONE) = 0 mmap(0x2aaaaadc1000, 184320, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x100000) = 0x2aaaaadc1000 mmap(0x2aaaaadee000, 16360, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aaaaadee000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaaadf2000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaaadf3000 mprotect(0x2aaaaade8000, 16384, PROT_READ) = 0 mprotect(0x2aaaaabbf000, 4096, PROT_READ) = 0 arch_prctl(0x1002, 0x2aaaaadf2b00) = 0 munmap(0x2aaaaaac1000, 150975) = 0 open("/dev/zap/pseudo", O_RDWR) = 3 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaaaac1000 write(1, "Opened pseudo zap interface, mea"..., 51Opened pseudo zap interface, measuring accuracy... ) = 51 rt_sigaction(SIGHUP, {0x400910, [HUP], SA_RESTART|0x4000000}, {SIG_DFL}, 8) = 0 rt_sigaction(SIGINT, {0x400910, [INT], SA_RESTART|0x4000000}, {SIG_DFL}, 8) = 0 read(3,