[mythtv-users] cannot schedule both tuners on AVerMedia Twinstar

Sun Aug 1 06:03:12 UTC 2021

On 01/08/2021 00.32, Stephen Worthington wrote:
> On Sat, 31 Jul 2021 20:00:37 +1000, you wrote:
> 
>> On 31/07/2021 13.25, Stephen Worthington wrote:
>>> On Sat, 31 Jul 2021 11:29:56 +1000, you wrote:
>>>
>>>> I had this USB tuner for a long time but decided to use it again now. Plugged it in and configured
>>>> the capture-card and input-connection. All tuners (there are 5 others) show up and can be tuned into in WatchTV.
>>>>
>>>> The wiki says "unsupported" but it was last updated in 2014 so probably out of date?
>>>>
>>>> The problem is with scheduling. I have the two Twinstar tuners set to almost the same priority.
>>>> myth refuses to use both, so (depending on the order I set) it will allow scheduling from one
>>>> and will not schedule on the other at all. I can change the priority to have it pick the other
>>>> and it then will never use the first.
>>>>
>>>> I am sure that this device has two independent tuners. It shows up as two devices in /dev/dvb/.
>>>> It shows up as two in mythtv status (actually each tuner shows up as 4 by reclimit).
>>>>
>>>> Looking at mythtv coming up I notice:
>>>>
>>>> CoreContext cardutil.cpp:1173 (SetDeliverySystem) - CardUtil[29]: Set delivery system: DVB-T
>>>> CoreContext cardutil.cpp:1173 (SetDeliverySystem) - CardUtil[33]: Set delivery system: DVB-T
>>>> CoreContext cardutil.cpp:1173 (SetDeliverySystem) - CardUtil[37]: Set delivery system: DVB-T
>>>> CoreContext cardutil.cpp:1173 (SetDeliverySystem) - CardUtil[41]: Set delivery system: DVB-T
>>>> CoreContext cardutil.cpp:1173 (SetDeliverySystem) - CardUtil[45]: Set delivery system: DVB-T
>>>> CoreContext cardutil.cpp:1173 (SetDeliverySystem) - CardUtil[50]: Set delivery system: DVB-T
>>>> CoreContext recorders/dvbchannel.cpp:699 (Tune) - DVBChan[50](/dev/dvb/adapter-OPEN-ELEC-6/frontend0): Next tuning after less than 1000ms. Delaying by 1000ms
>>>> CoreContext cardutil.cpp:1173 (SetDeliverySystem) - CardUtil[51]: Set delivery system: DVB-T
>>>>
>>>> The first cards (29-45) are the "older" USB tuners, 50 is the TwinStar does not schedule and
>>>> 51 is the other tuner on the Twinstar that does schedule.
>>>>
>>>> I looked over my settings and they look good to me.
>>>> I do notice One unusual message (see below). Is it related?
>>>>
>>>> Bootup messages that may be related:
>>>>
>>>> usb 1-4.4.2: New USB device found, idVendor=07ca, idProduct=0825, bcdDevice= 2.01
>>>> usb 1-4.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>>>> usb 1-4.4.2: Product: A825
>>>> usb 1-4.4.2: Manufacturer: AVerMedia TECHNOLOGIES, Inc.
>>>> usb 1-4.4.2: SerialNumber: 0000000000000
>>>>
>>>> dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
>>>> usb 1-4.4.2: dvb_usb_v2: found a 'AVerMedia Twinstar (A825)' in warm state
>>>> dvb_usb_af9035 1-4.4.2:1.0: Device may have issues with I2C read operations. Enabling fix. <<<<<<<<<<
>>>> usb 1-4.4.2: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
>>>> dvbdev: DVB: registering new adapter (AVerMedia Twinstar (A825))
>>>> usb 1-4.4.2: media controller created
>>>> dvbdev: DVB: registering new adapter (AVerMedia Twinstar (A825))
>>>>
>>>> $ uname -a
>>>> Linux e7.eyal.emu.id.au 5.13.5-200.fc34.x86_64 #1 SMP Sun Jul 25 16:19:01 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
>>>>
>>>> $ mythbackend --version
>>>> [see attached file as requested]
>>>>
>>>> TIA
>>>
>>> I have a Kworld DVB-T 399UR dual DVB-T USB tuner, and on it both
>>> tuners work, but due to some common hardware that is used by both
>>> tuners, you can not use both tuners at once in Linux.  It works fine
>>> in Windows, which is where I am now using it.
>>>
>>> With your tuners, have you tried setting up manual recordings with the
>>> tuner specified manually?
>>
>> Yes, and it always uses a different tuner rather than the preferred one.
>>
>>>   In LiveTV, what happens if you manually switch to the problem tuners?
>>
>> No go. Changing to the twin tuner automatically switches to the same channel rather than the
>> one I selected originally.
>>
>> Tuners 6 and 7 are the ones from the Twinstar.
>>
>> Tune to channel 34 on tuner 7 (a scheduled recording). OK.
>> Tune to channel 34 on tuner 6 (live TV). OK.
>> 	Change channel on tuner 6 to 30. On same multiplex. OK
>> 	Change channel on tuner 6 to 53. A different multiplex. Myth changed to tuner 4.
>> 	Change source back to tuner 6. Myth changed from channel 53 to 30.
>>
>> Myth seems to somehow know to not tune tuners 6 and 7 to different multiplexes.
>> How is this done?
	##### I still want to know the answer to this question. Anyone?

> That is what I would expect from two multirec tuners attached to the
> same physical tuner.  So it would be a good idea to check and make
> sure that your tuner numbers refer to what you think they do.  This is
> what the DVB-T tuners in my capturecard table look like:
> 
> MariaDB [mythconverg]> select
> cardid,parentid,videodevice,cardtype,inputname,sourceid,displayname
> from capturecard where inputname='DVB-T' order by videodevice,cardid;
> +--------+----------+-----------------------------+----------+-----------+----------+----------------+
> | cardid | parentid | videodevice                 | cardtype | inputname | sourceid | displayname    |
> +--------+----------+-----------------------------+----------+-----------+----------+----------------+
> |      1 |        0 | /dev/dvb/adapter0/frontend0 | DVB      | DVB-T     |        1 | DVB-T 1.1 (1)  |
> |      2 |        1 | /dev/dvb/adapter0/frontend0 | DVB      | DVB-T     |        1 | DVB-T 1.2 (2)  |
> |      3 |        1 | /dev/dvb/adapter0/frontend0 | DVB      | DVB-T     |        1 | DVB-T 1.3 (3)  |
> |      4 |        1 | /dev/dvb/adapter0/frontend0 | DVB      | DVB-T     |        1 | DVB-T 1.4 (4)  |
> |      5 |        1 | /dev/dvb/adapter0/frontend0 | DVB      | DVB-T     |        1 | DVB-T 1.5 (5)  |
> |      6 |        0 | /dev/dvb/adapter1/frontend0 | DVB      | DVB-T     |        1 | DVB-T 2.1 (6)  |
> |      7 |        6 | /dev/dvb/adapter1/frontend0 | DVB      | DVB-T     |        1 | DVB-T 2.2 (7)  |
> |      8 |        6 | /dev/dvb/adapter1/frontend0 | DVB      | DVB-T     |        1 | DVB-T 2.3 (8)  |
> |      9 |        6 | /dev/dvb/adapter1/frontend0 | DVB      | DVB-T     |        1 | DVB-T 2.4 (9)  |
> |     10 |        6 | /dev/dvb/adapter1/frontend0 | DVB      | DVB-T     |        1 | DVB-T 2.5 (10) |
> |     11 |        0 | /dev/dvb/adapter2/frontend0 | DVB      | DVB-T     |        1 | DVB-T 3.1 (11) |
> |     12 |       11 | /dev/dvb/adapter2/frontend0 | DVB      | DVB-T     |        1 | DVB-T 3.2 (12) |
> |     13 |       11 | /dev/dvb/adapter2/frontend0 | DVB      | DVB-T     |        1 | DVB-T 3.3 (13) |
> |     14 |       11 | /dev/dvb/adapter2/frontend0 | DVB      | DVB-T     |        1 | DVB-T 3.4 (14) |
> |     15 |       11 | /dev/dvb/adapter2/frontend0 | DVB      | DVB-T     |        1 | DVB-T 3.5 (15) |
> |     16 |        0 | /dev/dvb/adapter3/frontend0 | DVB      | DVB-T     |        1 | DVB-T 4.1 (16) |
> |     17 |       16 | /dev/dvb/adapter3/frontend0 | DVB      | DVB-T     |        1 | DVB-T 4.2 (17) |
> |     18 |       16 | /dev/dvb/adapter3/frontend0 | DVB      | DVB-T     |        1 | DVB-T 4.3 (18) |
> |     19 |       16 | /dev/dvb/adapter3/frontend0 | DVB      | DVB-T     |        1 | DVB-T 4.4 (19) |
> |     20 |       16 | /dev/dvb/adapter3/frontend0 | DVB      | DVB-T     |        1 | DVB-T 4.5 (20) |
> |     21 |        0 | /dev/dvb/adapter4/frontend0 | DVB      | DVB-T     |        1 | DVB-T 5.1 (21) |
> |     22 |       21 | /dev/dvb/adapter4/frontend0 | DVB      | DVB-T     |        1 | DVB-T 5.2 (22) |
> |     23 |       21 | /dev/dvb/adapter4/frontend0 | DVB      | DVB-T     |        1 | DVB-T 5.3 (23) |
> |     24 |       21 | /dev/dvb/adapter4/frontend0 | DVB      | DVB-T     |        1 | DVB-T 5.4 (24) |
> |     25 |       21 | /dev/dvb/adapter4/frontend0 | DVB      | DVB-T     |        1 | DVB-T 5.5 (25) |
> +--------+----------+-----------------------------+----------+-----------+----------+----------------+

My data is very similar.

+--------+----------+----------------------------------------+----------+-----------+----------+-------------+
| cardid | parentid | videodevice                            | cardtype | inputname | sourceid | displayname |
+--------+----------+----------------------------------------+----------+-----------+----------+-------------+
|     29 |        0 | /dev/dvb/adapter-OPEN-ELEC-1/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-1 |
|     30 |       29 | /dev/dvb/adapter-OPEN-ELEC-1/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-1 |
|     31 |       29 | /dev/dvb/adapter-OPEN-ELEC-1/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-1 |
|     32 |       29 | /dev/dvb/adapter-OPEN-ELEC-1/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-1 |
|     33 |        0 | /dev/dvb/adapter-OPEN-ELEC-2/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-2 |
|     34 |       33 | /dev/dvb/adapter-OPEN-ELEC-2/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-2 |
|     35 |       33 | /dev/dvb/adapter-OPEN-ELEC-2/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-2 |
|     36 |       33 | /dev/dvb/adapter-OPEN-ELEC-2/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-2 |
|     37 |        0 | /dev/dvb/adapter-OPEN-ELEC-3/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-3 |
|     38 |       37 | /dev/dvb/adapter-OPEN-ELEC-3/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-3 |
|     39 |       37 | /dev/dvb/adapter-OPEN-ELEC-3/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-3 |
|     40 |       37 | /dev/dvb/adapter-OPEN-ELEC-3/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-3 |
|     41 |        0 | /dev/dvb/adapter-OPEN-ELEC-4/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-4 |
|     42 |       41 | /dev/dvb/adapter-OPEN-ELEC-4/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-4 |
|     43 |       41 | /dev/dvb/adapter-OPEN-ELEC-4/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-4 |
|     44 |       41 | /dev/dvb/adapter-OPEN-ELEC-4/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-4 |
|     45 |        0 | /dev/dvb/adapter-OPEN-ELEC-5/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-5 |
|     47 |       45 | /dev/dvb/adapter-OPEN-ELEC-5/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-5 |
|     48 |       45 | /dev/dvb/adapter-OPEN-ELEC-5/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-5 |
|     49 |       45 | /dev/dvb/adapter-OPEN-ELEC-5/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-5 |
|     50 |        0 | /dev/dvb/adapter-OPEN-ELEC-6/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-6 |
|     52 |       50 | /dev/dvb/adapter-OPEN-ELEC-6/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-6 |
|     53 |       50 | /dev/dvb/adapter-OPEN-ELEC-6/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-6 |
|     54 |       50 | /dev/dvb/adapter-OPEN-ELEC-6/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-6 |
|     51 |        0 | /dev/dvb/adapter-OPEN-ELEC-7/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-7 |
|     55 |       51 | /dev/dvb/adapter-OPEN-ELEC-7/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-7 |
|     56 |       51 | /dev/dvb/adapter-OPEN-ELEC-7/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-7 |
|     57 |       51 | /dev/dvb/adapter-OPEN-ELEC-7/frontend0 | DVB      | DVB-T     |        2 | OPEN-ELEC-7 |
+--------+----------+----------------------------------------+----------+-----------+----------+-------------+

cardid's are unusual due to cards replaced etc (e.g. sourceid=1 was from the analogue days).

> Tuners that have parentid=0 are the first tuner of a set of multirec
> tuners.  Where parentid is non-zero, it refers back to the cardid of a
> tuner with parentid=0.  I have manually adjusted my tuners so they are
> all in order - yours may not be, so the cardid values may be out of
> sequence in the table.

I used 'order by videodevice,cardid' to get the ordered list.

>  I have also manually set the displayname
> values so that the logs show exactly which tuner is being used.

Good idea, I now renamed them too.

> Check that your tuners 6 and 7 both have parentid=0 and have different
> videodevice values.

They have, see cardid 50 and 51. They are really different devices (minor):

$ ls -l /dev/dvb/adapter-OPEN-ELEC-?/frontend0
crw-rw----+ 1 root video 212,  6 Jul 31 10:10 /dev/dvb/adapter-OPEN-ELEC-1/frontend0
crw-rw----+ 1 root video 212, 11 Jul 31 10:10 /dev/dvb/adapter-OPEN-ELEC-2/frontend0
crw-rw----+ 1 root video 212, 18 Jul 31 10:10 /dev/dvb/adapter-OPEN-ELEC-3/frontend0
crw-rw----+ 1 root video 212, 23 Jul 31 10:10 /dev/dvb/adapter-OPEN-ELEC-4/frontend0
crw-rw----+ 1 root video 212, 27 Jul 31 10:10 /dev/dvb/adapter-OPEN-ELEC-5/frontend0
crw-rw----+ 1 root video 212,  7 Jul 31 10:10 /dev/dvb/adapter-OPEN-ELEC-6/frontend0
crw-rw----+ 1 root video 212, 19 Jul 31 10:10 /dev/dvb/adapter-OPEN-ELEC-7/frontend0

-- 
Eyal Lebedinsky (eyal at eyal.emu.id.au)