Thank you Serge! The issue not solved. # aptitude show ipxe | grep -i version Version: 1.0.0+git-3.55f6c88-0ubuntu2.12.04.1~ppa1 # aptitude show kvm-ipxe | grep -i version Version: 1.0.0+git-3.55f6c88-0ubuntu2.12.04.1~ppa1 Strace log: ---cut---- select(16, [5 6 15], [], [], {0, 987950}) = 1 (in [5], left {0, 970520}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(5, "\16\0\0\0\0\0\0\0\376\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 128) = 128 rt_sigaction(SIGALRM, NULL, {0x7fc3dedf4250, ~[KILL STOP RTMIN RT_1], SA_RESTORER, 0x7fc3db7c9cb0}, 8) = 0 write(7, "\1\0\0\0\0\0\0\0", 8) = 8 read(5, 0x7fffb8dcc400, 128) = -1 EAGAIN (Resource temporarily unavailable) timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 250000}}, NULL) = 0 recvfrom(10, 0x7fc3e00d3ec4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) select(11, [10], NULL, NULL, {0, 0}) = 0 (Timeout) timer_gettime(0, {it_interval={0, 0}, it_value={0, 951}}) = 0 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 2 (in [5 6], left {0, 999998}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(6, "\1\0\0\0\0\0\0\0", 512) = 8 read(5, "\16\0\0\0\0\0\0\0\376\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 128) = 128 rt_sigaction(SIGALRM, NULL, {0x7fc3dedf4250, ~[KILL STOP RTMIN RT_1], SA_RESTORER, 0x7fc3db7c9cb0}, 8) = 0 write(7, "\1\0\0\0\0\0\0\0", 8) = 8 read(5, 0x7fffb8dcc400, 128) = -1 EAGAIN (Resource temporarily unavailable) timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 28933959}}, NULL) = 0 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [6], left {0, 999998}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(6, "\1\0\0\0\0\0\0\0", 512) = 8 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [5], left {0, 971287}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(5, "\16\0\0\0\0\0\0\0\376\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 128) = 128 rt_sigaction(SIGALRM, NULL, {0x7fc3dedf4250, ~[KILL STOP RTMIN RT_1], SA_RESTORER, 0x7fc3db7c9cb0}, 8) = 0 write(7, "\1\0\0\0\0\0\0\0", 8) = 8 read(5, 0x7fffb8dcc400, 128) = -1 EAGAIN (Resource temporarily unavailable) timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 250000}}, NULL) = 0 recvfrom(10, 0x7fc3e00d3ec4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) select(11, [10], NULL, NULL, {0, 0}) = 0 (Timeout) timer_gettime(0, {it_interval={0, 0}, it_value={0, 173410}}) = 0 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [6], left {0, 999998}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(6, "\1\0\0\0\0\0\0\0", 512) = 8 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [5], left {0, 999999}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(5, "\16\0\0\0\0\0\0\0\376\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 128) = 128 rt_sigaction(SIGALRM, NULL, {0x7fc3dedf4250, ~[KILL STOP RTMIN RT_1], SA_RESTORER, 0x7fc3db7c9cb0}, 8) = 0 write(7, "\1\0\0\0\0\0\0\0", 8) = 8 read(5, 0x7fffb8dcc400, 128) = -1 EAGAIN (Resource temporarily unavailable) timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 29129841}}, NULL) = 0 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [6], left {0, 999998}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(6, "\1\0\0\0\0\0\0\0", 512) = 8 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [5], left {0, 971140}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(5, "\16\0\0\0\0\0\0\0\376\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 128) = 128 rt_sigaction(SIGALRM, NULL, {0x7fc3dedf4250, ~[KILL STOP RTMIN RT_1], SA_RESTORER, 0x7fc3db7c9cb0}, 8) = 0 write(7, "\1\0\0\0\0\0\0\0", 8) = 8 read(5, 0x7fffb8dcc400, 128) = -1 EAGAIN (Resource temporarily unavailable) timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 250000}}, NULL) = 0 recvfrom(10, 0x7fc3e00d3ec4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) select(11, [10], NULL, NULL, {0, 0}) = 0 (Timeout) timer_gettime(0, {it_interval={0, 0}, it_value={0, 125833}}) = 0 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [6], left {0, 999998}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(6, "\1\0\0\0\0\0\0\0", 512) = 8 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [5], left {0, 999999}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(5, "\16\0\0\0\0\0\0\0\376\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 128) = 128 rt_sigaction(SIGALRM, NULL, {0x7fc3dedf4250, ~[KILL STOP RTMIN RT_1], SA_RESTORER, 0x7fc3db7c9cb0}, 8) = 0 write(7, "\1\0\0\0\0\0\0\0", 8) = 8 read(5, 0x7fffb8dcc400, 128) = -1 EAGAIN (Resource temporarily unavailable) timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 22070000}}, NULL) = 0 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [6], left {0, 999999}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(6, "\1\0\0\0\0\0\0\0", 512) = 8 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [5], left {0, 978209}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(5, "\16\0\0\0\0\0\0\0\376\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 128) = 128 rt_sigaction(SIGALRM, NULL, {0x7fc3dedf4250, ~[KILL STOP RTMIN RT_1], SA_RESTORER, 0x7fc3db7c9cb0}, 8) = 0 write(7, "\1\0\0\0\0\0\0\0", 8) = 8 read(5, 0x7fffb8dcc400, 128) = -1 EAGAIN (Resource temporarily unavailable) timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 250000}}, NULL) = 0 timer_gettime(0, {it_interval={0, 0}, it_value={0, 229765}}) = 0 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [6], left {0, 999999}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) read(6, "\1\0\0\0\0\0\0\0", 512) = 8 futex(0x7fc3dfa46460, FUTEX_WAKE_PRIVATE, 1) = 1 select(16, [5 6 15], [], [], {1, 0}) = 1 (in [5], left {0, 999999}) read(15, 0x7fffb8dcc480, 16) = -1 EAGAIN (Resource temporarily unavailable) ---cut---