[mythtv-users] Clunky tuner detection in mythtvsetup

[Mike Bibbings]

On 08/08/17 10:52, John Pilkington wrote:
> I have two devices with three DVB-T tuners on this box, running 30pre3 
> with the 4.4.79-1.el7.elrepo.x86_64 kernel.
>
> $ dmesg | grep adapt
> [   18.492232] DVB: registering new adapter (Kworld UB499-2T T09)
> [   18.497274] usb 1-1: DVB: registering adapter 1 frontend 0 (Afatech 
> AF9033 (DVB-T))...
> [   18.500472] DVB: registering new adapter (Kworld UB499-2T T09)
> [   18.516789] usb 1-1: DVB: registering adapter 2 frontend 0 (Afatech 
> AF9033 (DVB-T))...
> [   20.417032] DVB: registering new adapter (saa7133[0])
> [   20.417041] saa7134 0000:07:04.0: DVB: registering adapter 0 
> frontend 0 (Philips TDA10046H DVB-T)...
>
> The adapter error rates vary, 0 being the best and 2 the worst.  I aim 
> to have multirec settings of 8, 5, 5.  I have had this in the past but 
> recent trials had upset things;  yesterday I saw a gap in the schedule 
> and tried to improve matters.  It was a frustrating experience and I'm 
> not yet sure that I got what I wanted: a simple and logical assignment 
> of 'virtual tuner' numbers.
>
> The card identification process showed the type but probing often 
> failed to show the device identifier, and restarts always involved 
> lengthy searches for disecq trees and upnp devices like VBox, which I 
> know I don't have.  The kernel identified my hardware soon after boot.
>
> There was some work on this sort of thing at Ticket #12547 but setup 
> is typically done once and then forgotten.  Have I missed some shortcuts?
>
> John P
>
Mythtv fixes/29 (and master 30pre) allows multirec of upto 10 
(previously 5).

The way Capture cards are provisioned has changed in  fixes/29 and 
Master (from 0.28/Fixes) in that the maximum number of recordings is now 
set in Input Connections rather than Capture Cards. There is a side 
effect which means the order of creation is important otherwise tuners 
may not be efficiently used. Capture Card needs to be fully configured 
before adding the next one i.e. Create Capture Card, Create Video 
Source, Create Input Connections, then do the next Capture Card. In 
0.28/Fixes I was used creating all Capture Cards then Video Sources, 
followed by Input Connections.


Mike

Apologies for the direct email response to John P