diff options
| -rw-r--r-- | linux/Documentation/dvb/faq.txt | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/linux/Documentation/dvb/faq.txt b/linux/Documentation/dvb/faq.txt index bc8b5990b..470c8bcfd 100644 --- a/linux/Documentation/dvb/faq.txt +++ b/linux/Documentation/dvb/faq.txt @@ -99,14 +99,31 @@ Some very frequently asked questions about linuxtv-dvb If you are using a Technotrend/Hauppauge DVB-C card *without* analog module, you might have to use module parameter adac=-1 (dvb-ttpci.o). -5. The dvb_net device doesn't give me any multicast packets +5. The dvb_net device doesn't give me any packets at all + + Run tcpdump on the dvb0_0 interface. This sets the interface + into promiscous mode so it accepts any packets from the PID + you have configured with the dvbnet utility. Check if there + are any packets with the IP addr and MAC addr you have + configured with ifconfig. + + If tcpdump doesn't give you any output, check the statistics + which ifconfig outputs. (Note: If the MAC address is wrong, + dvb_net won't get any input; thus you have to run tcpdump + before checking the statistics.) If there are no packets at + all then maybe the PID is wrong. If there are error packets, + then either the PID is wrong or the stream does not conform to + the MPE standard (EN 301 192, http://www.etsi.org/). You can + use e.g. dvbsnoop for debugging. + +6. The dvb_net device doesn't give me any multicast packets Check your routes if they include the multicast address range. Additionally make sure that "source validation by reversed path lookup" is disabled: $ "echo 0 > /proc/sys/net/ipv4/conf/dvb0/rp_filter" -6. What the hell are all those modules that need to be loaded? +7. What the hell are all those modules that need to be loaded? For a dvb-ttpci av7110 based full-featured card the following modules are loaded: |