strace -tt output

16:29:00.513563 write(2, "drmOpenDevice: node name is /dev"..., 43drmOpenDevice: node name is /dev/dri/card0
) = 43
16:29:00.513616 stat64("/dev/dri", {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0
16:29:00.513697 stat64("/dev/dri/card0", {st_mode=S_IFCHR|0600, st_rdev=makedev(226, 0), ...}) = 0
16:29:00.513778 open("/dev/dri/card0", O_RDWR|O_LARGEFILE) = 4
16:29:00.513838 write(2, "drmOpenDevice: open result is 4,"..., 38drmOpenDevice: open result is 4, (OK)
) = 38
16:29:00.513897 ioctl(4, DEVFSDIOC_GET_PROTO_REV, 0x805f880) = 0
16:29:00.513947 ioctl(4, DEVFSDIOC_GET_PROTO_REV, 0x805f880) = 0
16:29:00.513994 close(4)                = 0
16:29:00.514038 write(2, "drmOpenByBusid: Searching for Bu"..., 53drmOpenByBusid: Searching for BusID pci:0000:00:02.0
) = 53
16:29:00.514085 geteuid32()             = 502
16:29:00.514123 write(2, "drmOpenDevice: node name is /dev"..., 43drmOpenDevice: node name is /dev/dri/card0
) = 43
16:29:00.514171 stat64("/dev/dri", {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0
16:29:00.514246 stat64("/dev/dri/card0", {st_mode=S_IFCHR|0600, st_rdev=makedev(226, 0), ...}) = 0
16:29:00.514331 open("/dev/dri/card0", O_RDWR|O_LARGEFILE) = 4
16:29:00.521635 write(2, "drmOpenDevice: open result is 4,"..., 38drmOpenDevice: open result is 4, (OK)
) = 38
16:29:00.521711 write(2, "drmOpenByBusid: drmOpenMinor ret"..., 39drmOpenByBusid: drmOpenMinor returns 4
) = 39
16:29:00.521779 ioctl(4, DECODER_SET_PICTURE, 0xbf98d190) = -1 EACCES (Permission denied)
16:29:00.521836 ioctl(4, DECODER_GET_CAPABILITIES, 0xbf98d194) = 0
16:29:00.521878 ioctl(4, DECODER_GET_CAPABILITIES, 0xbf98d194) = 0
16:29:00.521917 write(2, "drmOpenByBusid: drmGetBusid repo"..., 53drmOpenByBusid: drmGetBusid reports pci:0000:00:02.0
) = 53
16:29:00.522007 ioctl(4, DECODER_GET_STATUS or DEVFSDIOC_SET_EVENT_MASK, 0xbf98d4dc) = 0
16:29:00.522065 ioctl(4, DEVFSDIOC_GET_PROTO_REV, 0x805e088) = 0
...




16:29:01.149275 ioctl(4, 0xc0046444, 0xbf98cb60) = 0
16:29:01.149326 ioctl(4, 0x40046445, 0xbf98cb18) = 0
16:29:01.149389 ioctl(4, 0xc0046444, 0xbf98cba0) = 0
16:29:01.149428 ioctl(4, 0x40046445, 0xbf98cb58) = 0
16:29:01.149472 ioctl(4, 0xc0046444, 0xbf98cbd0) = 0
16:29:01.149587 ioctl(4, 0xc0046444, 0xbf98cb60) = 0
16:29:01.149631 ioctl(4, 0x40046445, 0xbf98cb18) = 0
16:29:01.149693 ioctl(4, 0xc0046444, 0xbf98cba0) = 0
16:29:01.149733 ioctl(4, 0x40046445, 0xbf98cb58) = 0
16:29:01.149777 ioctl(4, 0xc0046444, 0xbf98cbd0) = 0
16:29:01.149866 ioctl(4, 0xc0046444, 0xbf98cb60) = 0
16:29:01.149909 ioctl(4, 0x40046445, 0xbf98cb18) = 0
16:29:01.149970 ioctl(4, 0xc0046444, 0xbf98cba0) = 0
16:29:01.150010 ioctl(4, 0x40046445, 0xbf98cb58) = 0
16:29:01.150054 ioctl(4, 0xc0046444, 0xbf98cbd0) = 0
16:29:01.150165 ioctl(4, 0xc0046444, 0xbf98cb60) = 0
16:29:01.150209 ioctl(4, 0x40046445, 0xbf98cb18) = 0
16:29:01.150271 ioctl(4, 0xc0046444, 0xbf98cba0) = 0
16:29:01.150319 ioctl(4, 0x40046445, 0xbf98cb58) = 0
16:29:01.150363 ioctl(4, 0xc0046444, 0xbf98cbd0) = 0
16:29:01.150467 ioctl(4, 0xc010643a, 0xbf98d12c) = 0
16:29:01.150511 ioctl(4, 0xc010643a, 0xbf98d0e8) = 0
16:29:01.150551 ioctl(4, 0xc010643a, 0xbf98d0e8) = -1 EBUSY (Device or resource busy)
16:29:04.156359 select(4, [3], [3], NULL, NULL) = 1 (out [3])
16:29:04.156566 writev(3, [{"\22\0\23\0\2\0 \2\"\1\0\0\31\1\0\0\10NGE1\0\0\0/home/sh"..., 80}], 1) = 80
16:29:04.156715 select(4, [3], [], NULL, NULL) = 1 (in [3])
16:29:04.156944 read(3, "\34\336\'\0\2\0 \2\"\1\0\0\234\26\35\t\0\1\0\0\2\0\0\0\0\0\0\0\2\0 \2"..., 4096) = 64
16:29:04.157155 read(3, 0x80577b0, 4096) = -1 EAGAIN (Resource temporarily unavailable)
16:29:04.157315 read(3, 0x80577b0, 4096) = -1 EAGAIN (Resource temporarily unavailable)
16:29:04.157541 poll([{fd=3, events=POLLIN}], 1, 0) = 0
16:29:04.157738 select(4, [3], [3], NULL, NULL) = 1 (out [3])
16:29:04.157913 writev(3, [{"\10\0\2\0\2\0 \2", 8}], 1) = 8
16:29:04.158047 read(3, 0x80577b0, 4096) = -1 EAGAIN (Resource temporarily unavailable)
16:29:04.158296 read(3, 0x80577b0, 4096) = -1 EAGAIN (Resource temporarily unavailable)
16:29:04.158384 poll([{fd=3, events=POLLIN}], 1, 0) = 0
16:29:04.158509 ioctl(4, 0x4008642a, 0xbf98d294) = 0
16:29:04.158607 ioctl(4, 0xc0046444, 0xbf98d220) = 0
16:29:04.158709 ioctl(4, 0x40046445, 0xbf98d1d8) = 0
16:29:04.158865 ioctl(4, 0xc0046444, 0xbf98d260) = 0
16:29:04.158974 ioctl(4, 0x40046445, 0xbf98d218) = 0
16:29:04.159156 ioctl(4, 0xc0046444, 0xbf98d290) = 0
16:29:04.159350 ioctl(4, 0x4008642b, 0xbf98d2cc) = 0
16:29:04.159451 ioctl(4, 0x4008642a, 0xbf98d304) = 0