[mythtv-users] 0.28 Upgrade niggles

Andre MythTV mythtv-list at dinkum.org.uk
Sat Feb 11 23:04:16 UTC 2017

I got forced into an upgrade from 0.27 to 0.28 last week, satellite feed failed and the DVBT2 tuners I have now want T/T2 switching done properly!

The backend went fairly easily and now I can scan and tune DVBT2 channels as a stopgap until the satellite guys can get on to the roof, 4 stories up! The separate frontend didn’t go so well..

I was network booting minimyth2 to ramdisk, updating minimyth2 didn’t quite go to plan, mostly works except the frame buffer is stuck on 60Hz and I live in Europe so everything 25p looks really nasty. I’ve spent a few hours trying to debug this one but it all appears to be configured correctly but the nvidia driver ignores the frame rate change, RandR seems to be disabled which was the only clue I haven’t been able to find any clues about.

Is this a common gotcha with minimyth2 and Nvidia cards, GT640 for the record?

So I installed a small SSD and Mythbuntu 16.04.1, something I’d planned to do for a while. Now I’ve got the frame rate switching working correctly but the IR remote is only partially working…

I’ve checked for events with evtest and ir-keytable -t and it all seems in order, I can see a bunch of inputs including my USB MCE remote receiver, I can press buttons and get plausible key codes like 
1486853529.221702: event type EV_MSC(0x04): scancode = 0x800f0422
1486853529.221702: event type EV_SYN(0x00).
1486853529.471522: event type EV_KEY(0x01) key_up: KEY_OK(0x0160)
1486853529.471522: event type EV_SYN(0x00).
1486853532.460692: event type EV_MSC(0x04): scancode = 0x800f0416
1486853532.460692: event type EV_KEY(0x01) key_down: KEY_PLAY(0x00cf)
1486853532.460692: event type EV_SYN(0x00).
1486853532.566685: event type EV_MSC(0x04): scancode = 0x800f0416
1486853532.566685: event type EV_SYN(0x00).
1486853532.815519: event type EV_KEY(0x01) key_up: KEY_PLAY(0x00cf)
1486853532.815519: event type EV_SYN(0x00).
1486853534.004682: event type EV_MSC(0x04): scancode = 0x800f0418
1486853534.004682: event type EV_KEY(0x01) key_down: KEY_PAUSE(0x0077)
1486853534.004682: event type EV_SYN(0x00).
1486853534.110677: event type EV_MSC(0x04): scancode = 0x800f0418
1486853534.110677: event type EV_SYN(0x00).
1486853534.359528: event type EV_KEY(0x01) key_up: KEY_PAUSE(0x0077)
1486853534.359528: event type EV_SYN(0x00).

but only the up down left right buttons do anything in MythTV.

There’s a huge amount of information around about this stuff but all of it seems extremely out of date, I don’t want to start messing with LIRC as if I remember correctly that used to make everything really laggy.

Of the more modern information I’ve found most talks about fixing the key names but mine seem to be correct, just ignored by MythTV. I can’t really see where MythTV is configured to connect to the correct /dev/input/event only the /dev/lirc0 which I don’t think I should be using… If I try to edit keys I can’t add the KEY_PLAY KEY_OK button presses as they don’t appear in the editor when i press the buttons.

Does anyone know what minimyth2 does with ir-keytables etc. because that just works.

Thanks in advance for any clues.


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