[linux-dvb] Re: black Screen

["Reiner Rosin" <r_rosin@hotmail.com>]

Hi,

I have here a similar problem (switching from SAT.1 to RTL ends
in showing up Travel-Channel). I had a look at the vdr and driver
code the last weekend and found out that this problem is caused
by the diseqc-code (without diseqc, switching never fails). But so
far, vdr and the driver seem to be ok (only the 13/18V-switching
within the seqSendSequence function should be done first acc. to
diseqc-specs from eutelsat, but changing this didn't solve my
problem although I noticed some better results).
So there are two attempts trying to solve the problem ... first
would be to investigate the diseqc-code, but I assume that the
main problems with this are caused by "daempfung" of sat-cable .
But I didn't care about the old driver ... reading your mail I think
I'll give it another try.
Second attempt (only for 2-satellite-inst. with toneburst-capable-
equipment) is to use toneburst instead of diseqc-signaling for
sat-pos-switching, I changed vdr to use Toneburst instead of diseqc-
signaling, but this failed ... but I don't know if my Loop-Thru-
LNB is capable of doing toneburst and if the toneburst-signaling
in the driver works correct (timing) ... so if your switch is
toneburst-enabled and you are willing to test this, would be nice ...
If nobody is interested in such a solution ... I will just mount my
new sat-equipment ;)

bye, reiner

BTW: 22kHz-signaling works fine AFAIK and should ALWASY be used
for Hi/lo-Switching, not for sat-switching


>Hi there,
>
>I think this is a Diseqc or a 22 kHz problem from the 0.9 dvb driver.
>(s also Gernot A. Weber).
>
>my investigations:
>
>1.
>Last running system:
>dvb-driver 0.8.2   vdr 0.72   Linux 2.2.14 from SUSE 6.4
>running without any problems.(Astra and Eutelsat)
>
>DVB-S       active multiswitch                    Quadro-LNB
>sss-------------msmsms=============================lnb
>
>
>2.
>siemens_dvb-0.9-20010729   Linux 2.4.4-4GB from Suse 7.2, shows:
>(C) 2001 Convergence integrated media and a blank screen, no n-tv.
>
>DVB-S       active multiswitch                    Quadro-LNB
>sss-------------msmsms=============================lnb
>12,9V  25m        12,85V         12m               12,4V
>
>siemens_dvb-0.8.2   Linux 2.4.4-4GB from Suse 7.2, shows:
>(C) 2000 Convergence integrated media and n-tv!!
>
>
>3.
>siemens_dvb-0.9-20010729
>DVB-S direct connected to highband vertical output, shows:
>(C) 2000 Convergence integrated media and n-tv!!
>
>DVB-S       direct connected   highband vertical  Quadro-LNB
>sss--------------=======---------------------------lnb
>12,9V  25m        12,85V         12m               12,8V
>
>
>4.
>siemens_dvb-0.9-20010729
>short connection, shows:
>(C) 2000 Convergence integrated media and n-tv!!
>
>DVB-S      highband vertical  Quadro-LNB
>sss----------------------------lnb
>12,9V        5m                12.9V
>
>the same behavior from the newer dvb driver.
>
>5.
>After i changed the multiswitch to toogle with 22 kHz
>beetween lowband and highband instead between LNB A or B
>i could use the multiswitch again (but no RTL)
>
>Otto
>
>
>Anders.Bissmeier@Bertelsmann.de schrieb:
>
> > Hi there,
> >
> > I've been trying to get my DVB Card running under linux for several 
>weeks,
> > but after compiling and make insmod I only get the 
>Convergence-Trademark,
> > and after it disappeares the screen went black.
> > I tried the step-by-step by Hubertus Sandmann and the documentation
> > from Linux User (09/2001) and I'm sure that I've done everything right.
> > The /var/log/messages look OK - the DVB card was found.
> >
> > My hardware is:
> >
> > PIII 500MhZ / 256 MB
> > Hauppauge DVB-s
> > Sat-Dish with two dual LNB's (Astra & Hotbird)
> > 8-port SAT-Switch
> >
> > Can you tell me, if I have to make some changes in the standard
> > configuration of the driver
> > or in the .dvbrc (maybe for the fact that there is a switch between DVB 
>and
> > LNB).
> >
> > Has anybody else this problem ? (and solved it ???)
> >
> > Thanks for help,
> >
> > Anders
> >
> > --
> > Info:
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>linux-dvb" as subject.
>
>
>
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