[mythtv-users] Channel tuning broken in 0.24

[Michael Watson]

On 1/06/2012 10:33 PM, Igor Cicimov wrote:
> On Fri, Jun 1, 2012 at 9:41 AM, Michael Watson 
> <michael at thewatsonfamily.id.au <mailto:michael at thewatsonfamily.id.au>> 
> wrote:
>
>     On 31/05/2012 3:42 PM, Igor Cicimov wrote:
>
>         On Thu, May 31, 2012 at 3:20 PM, Michael T. Dean
>         <mtdean at thirdcontact.com <mailto:mtdean at thirdcontact.com>
>         <mailto:mtdean at thirdcontact.com
>         <mailto:mtdean at thirdcontact.com>>> wrote:
>
>            On 05/31/2012 12:53 AM, Michael Watson wrote:
>
>                On 31/05/2012 11:45 AM, Igor Cicimov wrote:
>
>                    I noticed that after upgrade to Mythtv 0.24 the channel
>                    tuning is awful. I'm using Leadtek DVB-T DTV2000H
>         (using
>                    the digital receiver only) and the card was working
>         fine
>                    for years on 0.20 and later for couple of months on
>                    0.23-fixes. After upgrade to 0.24-fixes it can't
>         scan half
>                    of the DVB-T channels in Sydney and recording on it is
>                    practically impossible. The distro is Mythbuntu
>         10.04 with
>                    the latest kernel from the repo (which I think is
>         2.6.35
>                    but not sure I'm not at home now to check).
>
>                    What has changed in Mythtv to affect this card so
>         badly?
>                    Anything I can do to improve the performance? And
>         yes, I
>                    tried deleting all the cards,inputs,sources etc in the
>                    backend and recreating again but no changes. Or
>         maybe the
>                    kernel driver cx88xx in the latest kernels does not
>         play
>                    good with this card any more?
>
>                    Before rolling back to 0.23 I'll try to check the card
>                    performance outside Mythtv. In meantime, any
>         suggestions
>                    to solve this highly appreciated.
>
>                I had to increase the Tuning Timeout.  3000ms seemed to
>         work
>                well for me in Melbourne.
>
>
>            Good advice.  I highly recommend a minimum of 3000ms/5500ms for
>            tuning and signal timeouts.
>
>            Mike
>
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>
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>
>
>         Yep that's also one thing that I tried. I had them set to 6s
>         and 10s respectively which didn't happened at all, it just
>         made scanning the whole channel range last longer.
>
>         Any other ideas? I'll try 0.25-fixes tonight if I have some
>         time, I've read the LiveTV has been much improved in this release.
>
>         Thanks,
>         Igor
>
>     When C31 first went digital, I was unable to successfully scan
>     using mythtv, in order to get it to scan, I had to use w_scan to
>     create an 'initial tuning-data' file, then use scan (from
>     dvb-utils) to create a channels.conf file, then import the
>     channels.conf file into MythTV.  Once this process was complete,
>     it all worked fine.   But at some point there was an issue with
>     channels.conf import into MythTV I believe, not sure if it has
>     been fixed or not in 0.24.
>
>     Another option, if you have another card, is to use the non
>     Leadtek card to do the channel scan, and connect the Leadtek to
>     the same video source.
>
>     Michael
>
>
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>
>
> Hi Michael,
>
> How do you import the channels.conf file into MythTV?
>
> Thanks,
> Igor

mythtv-setup -> Input Connections -> Scan Channels -> *Scan Type: Import 
Channels.conf*