Twinhan dvb-c pci card lost frames problem

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My OS is Fedora Core 5 ,ls pci -v I get:
00:0b.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
        Subsystem: Twinhan Technology Co. Ltd VisionPlus DVB card
        Flags: bus master, medium devsel, latency 32, IRQ 19
        Memory at f7ffe000 (32-bit, prefetchable) [size=4K]
        Capabilities: [44] Vital Product Data
        Capabilities: [4c] Power Management version 2

00:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
        Subsystem: Twinhan Technology Co. Ltd VisionPlus DVB Card
        Flags: bus master, medium devsel, latency 32, IRQ 19
        Memory at f7fff000 (32-bit, prefetchable) [size=4K]
        Capabilities: [44] Vital Product Data
        Capabilities: [4c] Power Management version 2
lsmod I get:
dvb_bt8xx              15108  0
nxt6000                 6916  1 dvb_bt8xx
mt352                   6148  1 dvb_bt8xx
dvb_pll                11524  1 dvb_bt8xx
sp887x                  6916  1 dvb_bt8xx
dst_ca                 11904  1 dvb_bt8xx
dst                    20740  2 dvb_bt8xx,dst_ca
dvb_core               74280  2 dvb_bt8xx,dst_ca
cx24110                 7684  1 dvb_bt8xx
or51211                 9220  1 dvb_bt8xx
lgdt330x                7452  1 dvb_bt8xx
ppdev                   8964  0
autofs4                18948  1
hidp                   16000  2
rfcomm                 34580  0
l2cap                  23808  10 hidp,rfcomm
bluetooth              44132  5 hidp,rfcomm,l2cap
sunrpc                136124  1
ip_conntrack_netbios_ns     3200  0
ipt_REJECT              5504  1
xt_state                2432  2
ip_conntrack           49196  2 ip_conntrack_netbios_ns,xt_state
nfnetlink               6680  1 ip_conntrack
xt_tcpudp               3456  4
iptable_filter          3328  1
ip_tables              11848  1 iptable_filter
x_tables               12676  4 ipt_REJECT,xt_state,xt_tcpudp,ip_tables
dm_mirror              20048  0
dm_mod                 50456  1 dm_mirror
video                  15108  0
button                  6800  0
battery                 9476  0
ac                      5124  0
ipv6                  226656  12
lp                     12488  0
parport_pc             25636  1
parport                34376  3 ppdev,lp,parport_pc
floppy                 57924  0
nvram                   8584  0
ehci_hcd               28680  0
uhci_hcd               29072  0
bt878                  11256  2 dvb_bt8xx,dst
tuner                  45868  0
bttv                  166260  2 dvb_bt8xx,bt878
video_buf              21252  1 bttv
compat_ioctl32          1664  1 bttv
i2c_algo_bit            8584  1 bttv
v4l2_common             7936  2 tuner,bttv
snd_via82xx            26520  1
btcx_risc               5000  1 bttv
ir_common               9604  1 bttv
gameport               15496  1 snd_via82xx
snd_ac97_codec         84128  1 snd_via82xx
snd_ac97_bus            2688  1 snd_ac97_codec
snd_seq_dummy           3972  0
tveeprom               13968  1 bttv
snd_seq_oss            29184  0
snd_seq_midi_event      7296  1 snd_seq_oss
snd_seq                47088  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
videodev                9600  1 bttv
snd_pcm_oss            45056  0
snd_mixer_oss          16640  1 snd_pcm_oss
snd_pcm                76932  3 snd_via82xx,snd_ac97_codec,snd_pcm_oss
snd_timer              22660  2 snd_seq,snd_pcm
snd_page_alloc         10504  2 snd_via82xx,snd_pcm
via_rhine              22660  0
mii                     5504  1 via_rhine
i2c_viapro              8468  0
i2c_core               20736  13 dvb_bt8xx,nxt6000,mt352,sp887x,dst,cx24110,or51211,lgdt330x,tuner,bttv,i2c_algo_bit,tveeprom,i2c_viapro
snd_mpu401_uart         8064  1 snd_via82xx
snd_rawmidi            24192  1 snd_mpu401_uart
snd_seq_device          8972  4 snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd                    50564  13 snd_via82xx,snd_ac97_codec,snd_seq_oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore               9568  1 snd
ext3                  115976  1
jbd                    52500  1 ext3
sata_via                8196  0
libata                 53776  1 sata_via
sd_mod                 16384  0
scsi_mod              124200  2 libata,sd_mod

When I use czap I get:
[root@localhost szap]# ./czap -c my.conf -n 6
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
  6 006b:459000000:INVERSION_AUTO:6900000:FEC_NONE:QAM_64:166:104:107
  6 006b: f 459000000, s 6900000, i 2, fec 0, qam 3, v 0xa6, a 0x68
status 00 | signal 0000 | snr 0000 | ber 0804ac74 | unc 00a1cff4 |
status 1f | signal 0000 | snr 0000 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 1700 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 1700 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 1700 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 1700 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 1700 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 1700 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
status 1f | signal 0000 | snr 5f00 | ber 0804ac74 | unc 00a1cff4 | FE_HAS_LOCK
When I use dvbsnoop , I found that the "continuity_counter"  is not  continuous.It  seems that  it  lost  many  packets.
  Is  linux  support  this  card?  and what happened?
Thanks!


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