Technotrend TT-Connect CT 3650 and dvb_ca

Technotrend TT-Connect CT 3650 and dvb_ca

[Johan Henæs]

Hello Everyone !

I have three DVB-C devices of the type mentioned, connected to my 
mythtv-server which have been working great for a long time. As my cable 
provider now are planning to start encrypting all channels, I have 
bought a Xcrypt CAM module as needed. I soon realised that I needed to 
upgrade the kernel and are now running kernel /: 3.2.0-17-generic 
#27-Ubuntu SMP Fri Feb 24 22:03:50 UTC 2012 x86_64 x86_64 x86_64 
GNU/Linux/ .

When inserting the module everything looks well :

/dvb_ca adapter 0: DVB CAM detected and initialised successfully/

The problems start when trying to watch an encrypted channel. I do get a 
channel lock in myth, so far so good, but no picture...

In my syslog I see the following :

/dvb_ca adapter 0: CAM tried to send a buffer larger than the link 
buffer size (32896 > 255)!
dvb_ca adapter 0: CAM tried to send a buffer larger than the ecount size!
dvb_ca adapter 0: DVB CAM link initialisation failed :(/

Any ideas on what might be wrong ?

Best regards,

Johan

Re: Technotrend TT-Connect CT 3650 and dvb_ca

[Martin MAURER]

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Hi Johan,

I have a similar problem which happens every few days with this card.
For me it helps to remove and reinsert the kernel module whenever this
happens.
"rmmod -f dvb_usb_ttusb2 && modprobe dvb_usb_ttusb2"

see also the following unresolved threads:
http://www.spinics.net/lists/linux-media/msg43531.html

http://www.spinics.net/lists/linux-media/msg43813.html

Martin


On Tue, 2012-03-06 at 21:40 +0100, Johan Henæs wrote:
> Hello Everyone !
> 
> I have three DVB-C devices of the type mentioned, connected to my 
> mythtv-server which have been working great for a long time. As my cable 
> provider now are planning to start encrypting all channels, I have 
> bought a Xcrypt CAM module as needed. I soon realised that I needed to 
> upgrade the kernel and are now running kernel /: 3.2.0-17-generic 
> #27-Ubuntu SMP Fri Feb 24 22:03:50 UTC 2012 x86_64 x86_64 x86_64 
> GNU/Linux/ .
> 
> When inserting the module everything looks well :
> 
> /dvb_ca adapter 0: DVB CAM detected and initialised successfully/
> 
> The problems start when trying to watch an encrypted channel. I do get a 
> channel lock in myth, so far so good, but no picture...
> 
> In my syslog I see the following :
> 
> /dvb_ca adapter 0: CAM tried to send a buffer larger than the link 
> buffer size (32896 > 255)!
> dvb_ca adapter 0: CAM tried to send a buffer larger than the ecount size!
> dvb_ca adapter 0: DVB CAM link initialisation failed :(/
> 
> Any ideas on what might be wrong ?
> 
> Best regards,
> 
> Johan
> 
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Re: Technotrend TT-Connect CT 3650 and dvb_ca

[Johan Henæs]

On Mar 7, 2012, at 5:23 PM, Martin MAURER wrote:

> Hi Johan,
> 
> I have a similar problem which happens every few days with this card.
> For me it helps to remove and reinsert the kernel module whenever this
> happens.
> "rmmod -f dvb_usb_ttusb2 && modprobe dvb_usb_ttusb2"


Thanks a lot, Martin !

My challenge is that it happens every time i try to watch an encrypted channel.... :-(

Best,

Johan