OK, I tried it. Boot Fedora 4 with 2.6.17.8. Hg clone http://linuxtv.org/hg/v4l-dvb Dmesg shows error: bt878: Unknown symbol bttv_write_gpio bt878: Unknown symbol bttv_gpio_enable Anybody know how to fix this? Best Regards, Cornel van Lingen -----Original Message----- From: linux-dvb-bounces@xxxxxxxxxxx [mailto:linux-dvb-bounces@xxxxxxxxxxx] On Behalf Of Dave Schile Sent: 07 September 2006 18:25 To: linux-dvb@xxxxxxxxxxx Subject: Getting a Twinhan 1025 DVB-S Card Working in NorthAmerica About a month ago, I got a twinhan VisionPlus 1025 DVB-S card working in my Linux box. I'm sure I wouldn't have figured it out without the help of this list. At the suggestion of folks who helped me get the card working, I am writing this little guide in hopes of helping others. This is probably less a guide than just a description of what worked for me, and what caused me troubles. I only say that as a caveat that the things that I did might not work for you depending on myriad variables. MY SETUP Hardware: AMD 2800+, 512 Mb Ram, Nvidia GPU, Twinhan VP 1025 DVB-S OS: 2.6.17.8 Kernel, Debian testing. Locale: Southern California, USA I mention my locale above because I had some problems finding the correct satellite to use. I should say that before this, I had absolutely no experience with anything to do with satellite communication. At first there was much confusion, I had no idea where to start, and there seemed to be so many different boards out there with different versions of software and different patches. The first thing to do is make sure the card is working, or at least recognized my linux. I won't go into kernel configuration, because the linuxtv wiki does that very well. For me, the kernel was configured correctly, but the drivers didn't work anyway. Drivers are software that provide communication between the card and the kernel/computer. The drivers that I just mentioned are the ones that come in the source with the kernel (in my case kernel 2.6.17.8). When loading those drivers after compiling them, the module dst couldn't identify my frontend. The frontend, as I understand it, is basically the tuner on the Twinhan card that should be spewing forth am audio/video stream. What I had to do was download the most recent version of the v4l-dvb drivers from the linuxtv.org repository. The Mercurial system they use is well documented on the site. Once I got the drivers compiled and installed, the kernel seemed to recognize the card and the devices were all created in /dev/dvb/adapter0 To load the drivers, I use these commands: # modprobe bttv card=113 # modprobe dvb-bt8xx # modprobe dst verbose=4 The 'verbose=4' part is optional, but provides debugging information in dmesg to help you troubleshoot. Now that it seemed my card was operational, the next big problem I had was making it operate. Seriously, I had the hardest time figuring out how to tune to a transponder. After much reading I was funneled to lyngsat.com where there is an full listing of all the satellites above us and what is available on them. Before you even look at them, make sure you know what type of LNB you have. The LNB (Low Noise Blockconverter) is that funky shaped thing protruding from the dish. In my case, I was given an old DirecTv dish. The key things to know about an LNB are its polarization and its LOF or Oscillator values. Because much of the documentation for linuxtv is European, and Europe has a universal LNB with different values than here in America, none of the examples worked for me. So, knowing your LOF and polarization is important For me, I had a circular LNB with a single LOF of 11250. The circular refers to polarization. This means that I will only pick up signals that are Left or Right in polarization. This can be seen in the first column in lyngsat tables. Next, the LOF of 11250 means that After the dish gets the signal at a very high frequency, It reduces that frequency by 11250 mHz so it'll travel thru the cable better. Any software you use to tune your card with needs to know what LOF settings you have. Once I figured out what types of satellites I could see, I went lyngsat to find there locations. There are calculators on the web that will tell you in which direction to aim the dish. As far as I know, with linux, there is no software to help you actually aim the dish, or tell you what satellite your pointed at. I found it very helpful to have a sf-95 satellite finder. You can get these on ebay all day long for about $10. They help alot. Once you're dish is well-aimed at the bird, you can tune in to a transponder. Go to lyngsat and get the frequency, polarization, and symbol rate of the transponder. Use the scan utility to take this information and build a list of channels you can receive. Make sure you're telling scan what your LOF is with the -l option. Once you have the channels you use szap to tune the card to a particular channel. You can use the -r option with szap to pipe the card's output to the /dev/dvb/adapter0/dvr0 device. Then you can cat this stream into your favorite player (as long as it can decode an mpeg2 transport stream). Good luck! _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
