[linux-dvb] Re: Tuning Problems With Hauppauge dec2000t

[Alex Woods <linux-dvb@giblets.org>]

On Saturday 06 December 2003 3:04 pm, Stefan weidt wrote:
> I'm trying to set up my dec2000t in Linux and I seem to have compiled the
> driver successfully but I'm having trouble getting it to scan for channels.

The driver does not yet support data sections, so the scan app will not work 
I'm afraid.  Hopefully, you can find a channels.conf for the transmitter near 
you, otherwise you will have to craft one by hand.  Let me know if you need 
any help with this.

> or if I try and use CVS dvbtune to tune to a specific frequency:
>
> ./dvbtune -f 570000000
> Using DVB card "TechnoTrend/Hauppauge DEC-2000-t Frontend"
> tuning DVB-T (in United Kingdom) to 570000000 Hz
> polling....
> Getting frontend event
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI
> FE_HAS_SYNC Bit error rate: 0
> Signal strength: 255
> SNR: 0
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI
> FE_HAS_SYNC
>
> dmesg tells me this:
>
> usb 1-2: bulk timeout on ep4in
> ttusb_dec_send_command: result bulk message failed: error -110

The dec seems to be quite sensitive about when it is sent usb messages, and 
consistently times out to the first message directly after it's loaded the 
bootcode on 2.6 kernels in my experience.  I thought I'd fixed this at some 
point, but obviously not.  So - expect the first attempt to fail, subsequent 
ones should work though.  Really I need to at least make the driver retry 
after a timeout.

Cheers,
Alex



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