[mythtv-users] Backend Startup

[John Pilkington]

On 28/11/2018 13:25, John wrote:
> On 28/11/2018 11:35, John wrote:
>> I am experiencing flaky tuner startup at power on - reliable after 
>> restart.
>>
>> I notice that my two dual tuners USB & PCI are loading firmware after 
>> the backend starts. I tried putting a delay in mythbackend.service but 
>> this does not work. The tuners only start loading firmware after 
>> sytemd declares Startup finished.
>>
>> 11:16:13 tv systemd[1]: Started MythTV Backend.
>> Nov 28 11:16:13 tv systemd[1]: Startup finished in 6.524s (firmware) + 
>> 4.968s (loader) + 1.556s (kernel) + 37.074s (userspace) = 50.123s.
>> Nov 28 11:16:14 tv kernel: [   39.174505] m88ds3103 1-0069: 
>> downloading firmware from file 'dvb-demod-m88rs6000.fw'
>> Nov 28 11:16:17 tv kernel: [   42.065433] m88ds3103 1-0069: firmware 
>> version: 4.1
>> Nov 28 11:16:19 tv kernel: [   44.132909] m88ds3103 2-0069: 
>> downloading firmware from file 'dvb-demod-m88rs6000.fw'
>> Nov 28 11:16:22 tv kernel: [   47.018474] m88ds3103 2-0069: firmware 
>> version: 4.1
>> Nov 28 11:16:23 tv kernel: [   48.906105] si2168 8-0064: downloading 
>> firmware from file 'dvb-demod-si2168-b40-01.fw'
>> Nov 28 11:16:24 tv kernel: [   49.113970] si2168 8-0064: firmware 
>> version: B 4.0.11
>> Nov 28 11:16:24 tv kernel: [   49.166094] si2157 11-0060: firmware 
>> version: 3.0.5
>> Nov 28 11:16:25 tv kernel: [   50.192247] si2168 10-0067: downloading 
>> firmware from file 'dvb-demod-si2168-b40-01.fw'
>> Nov 28 11:16:25 tv kernel: [   50.393052] si2168 10-0067: firmware 
>> version: B 4.0.11
>> Nov 28 11:16:25 tv kernel: [   50.445052] si2157 12-0063: firmware 
>> version: 3.0.5
>>
>> How do I start the backend without systemd so that I can delay it 
>> until the tuners are fully initialised?
>>
> Ok sussed out how to stop the backend autostarting. Horrified to find 
> that the card firmware re-load is triggered by manually starting the 
> back end.
> 
> 5 minute gap after system start
> 
> Nov 28 13:14:27 tv systemd[1]: Started MythTV Backend.
> Nov 28 13:14:27 tv kernel: [  232.884743] m88ds3103 1-0069: downloading 
> firmware from file 'dvb-demod-m88rs6000.fw'
> Nov 28 13:14:30 tv kernel: [  235.773883] m88ds3103 1-0069: firmware 
> version: 4.1
> Nov 28 13:14:32 tv kernel: [  237.831925] m88ds3103 2-0069: downloading 
> firmware from file 'dvb-demod-m88rs6000.fw'
> Nov 28 13:14:35 tv kernel: [  240.720278] m88ds3103 2-0069: firmware 
> version: 4.1
> Nov 28 13:14:37 tv kernel: [  242.606915] si2168 8-0064: downloading 
> firmware from file 'dvb-demod-si2168-b40-01.fw'
> Nov 28 13:14:37 tv kernel: [  242.813141] si2168 8-0064: firmware 
> version: B 4.0.11
> Nov 28 13:14:37 tv kernel: [  242.865119] si2157 11-0060: firmware 
> version: 3.0.5
> Nov 28 13:14:38 tv kernel: [  243.896475] si2168 10-0067: downloading 
> firmware from file 'dvb-demod-si2168-b40-01.fw'
> Nov 28 13:14:38 tv kernel: [  244.097223] si2168 10-0067: firmware 
> version: B 4.0.11
> Nov 28 13:14:38 tv kernel: [  244.148740] si2157 12-0063: firmware 
> version: 3.0.5
> 
> So presumably this is normal and is not pertinent to my reliability issue.
> 
> I note however that subsequent restarts of the backend do not trigger 
> this and always work ......
> 
> So I will try always restarting the backend after boot.
> 

I just booted my Fedora 28 box, on which I start mythbackend from the 
keyboard.  The tuner firmware was loaded at 26 seconds (af9013) and 46 
seconds (tda1004x).  No myth components running.

I suppose your backend must be initialising hardware that hasn't been 
found during boot.

John P