[mythtv-users] MCE/HID remote double events

Zach Cutlip uid000 at gmail.com
Mon Jun 17 22:12:46 UTC 2019

Awesome, thanks, Stephen.

I'll give those a try; I may have missed some of the Lirc components.

The reason I gave up on lirc is my old lirc setup has more or less
stopped working since updating to Ubuntu 18.04 and MythTV 29 (and now
30). I think you an I emailed about this a bit on the list a few
months back, but I had a Tivo Series Two config (same harmony remote).
I did get lirc going again after the update, but Myth is super
unresponsive with it, missing or ignoring something like 80% of
events, even when 'irw' sees all the events. I never got to the bottom
of it, but when learned the evdev thing works out of the box with MCE
remotes, I wondered if a lirc-free life might be simpler. I'm happy to
consider either option though. Whatever it takes to get things working


On Mon, Jun 17, 2019 at 7:15 AM Stephen Worthington
<stephen_agent at jsw.gen.nz> wrote:
> On Sun, 16 Jun 2019 17:17:14 -0700, you wrote:
> >Hello,
> >
> >I'm trying to set up an MCE remote using evdev, and I'm getting double events in Mythfrontend for every key fairly consistently; maybe 80% of the time.
> >
> >I've set up the remote from a combination of these two wiki articles:
> >
> >https://www.mythtv.org/wiki/HID_Remotes
> >https://www.mythtv.org/wiki/User_Manual:IR_control_via_evdev
> >
> >evtest usually doesn't report the extra event even when Mythtv does.
> >
> >I've even set repeat delay and period to really high values.
> >
> >For example, here's an instance where pressing "down" resulted in event, but 'evtest' didn't:
> >Testing ... (interrupt to exit)
> >Event: time 1560729712.782138, type 4 (EV_MSC), code 4 (MSC_SCAN), value 800f041f
> >Event: time 1560729712.782138, type 1 (EV_KEY), code 108 (KEY_DOWN), value 1
> >Event: time 1560729712.782138, -------------- SYN_REPORT ------------
> >Event: time 1560729712.888133, type 4 (EV_MSC), code 4 (MSC_SCAN), value 800f041f
> >Event: time 1560729712.888133, -------------- SYN_REPORT ------------
> >Event: time 1560729713.022172, type 4 (EV_MSC), code 4 (MSC_SCAN), value 800f041f
> >Event: time 1560729713.022172, -------------- SYN_REPORT ------------
> >Event: time 1560729713.294223, type 1 (EV_KEY), code 108 (KEY_DOWN), value 0
> >Event: time 1560729713.294223, -------------- SYN_REPORT ------------
> >
> >Here's ir-keytable output:
> >
> >Found /sys/class/rc/rc0/ (/dev/input/event8) with:
> >       Name: Media Center Ed. eHome Infrared Remote Transceiver (1784:0011)
> >       Driver: mceusb, table: rc-rc6-mce
> >       Supported protocols: rc-5 rc-5-sz jvc sony nec sanyo mce_kbd rc-6 sharp xmp
> >       Enabled protocols: rc-6
> >       bus: 3, vendor/product: 1784:0011, version: 0x0100
> >       Repeat delay = 10000 ms, repeat period = 10000 ms
> >
> >FIW the remote is a Logitech harmony 650 programmed as a Windows Media Center PC.
> >
> >Thanks in advance,
> >Zach
> I tried evtest on my system with my MCE remote and the above is
> exactly what I get with lirc shut down.  The keystrokes look fine.
> I had problems with the lirc setup in 18.04, and at times I was
> getting double keystokes with lirc running.  It seems that there are
> two different paths for keystrokes to get to mythfrontend, one via
> lirc or the keyboard (they use the same path), and one via X.  In my
> case, the path via X was sometimes providing a keystroke as well as
> lirc was.  The cause was the bad way that lirc was installed by its
> package - there were multiple other daemons in the lirc package other
> than lircd that were all enabled and running, but they did not have
> valid configuration, and one of them was sending keystrokes via X. So,
> are you sure you have all the lirc daemons shut down?  The lirc
> package installs these files for systemd units:
> /lib/systemd/system/irexec.service
> /lib/systemd/system/lircd-setup.service
> /lib/systemd/system/lircd-uinput.service
> /lib/systemd/system/lircd.service
> /lib/systemd/system/lircd.socket
> /lib/systemd/system/lircmd.service
> If you are not using lirc, all of those need to be given valid
> configuration, or stopped and disabled:
> sudo su
> systectl stop irexec
> systemctl disable irexec
> systectl stop lircd-setup
> systemctl disable lircd-setup
> systectl stop lircd-uinput
> systemctl disable lircd-uinput
> systectl stop lircd
> systemctl disable lircd
> systectl stop lircd-socket
> systemctl disable lircd-socket
> systectl stop lircmd
> systemctl disable lircmd
> exit
> I think that it was either lircd-uinput or lircmd that was causing my
> double keystrokes, but as it went away when I disabled all the ones I
> was not using, I never confirmed the exact source of the problem.  So
> if you run the above commands and your double keystroke problem goes
> away, that it is likely you were suffering from the same problem.
> Or you could just uninstall the lirc package completely:
> sudo apt purge lirc
> Is there any particular reason that you are not wanting to use lirc
> with your remote?  It is more flexible and allows you to use more than
> one program with the IR remote.  If you follow that wiki and map
> specific keystrokes to what mythfrontend needs, unless any other
> program you want to work with the remote uses exactly the same
> keystokes, you will not be able have it use the remote.  I use mplayer
> as an alternate video player with mythfrontend videos as I have a
> number of old .wmv files that mythfrontend is unable to play.  So I
> definitely need to use lirc so that both mythfrontend and mplayer work
> with the remote.  I think it is very limiting to only be able to use
> the remote with mythfrontend.
> If the reason you want to use the wiki page's setup is that you have
> been having problems getting lirc going in 18.04, then you have simply
> met the problem that, as installed by the lirc package, lirc in 18.04
> is badly broken.  To fix that, download and run my fix script:
> http://www.jsw.gen.nz/mythtv/lirc-ubuntu-18.04-install.sh
> That fixes all the problems with the package that I know about, so
> that the Python config tools such as lirc-setup will work, and
> disables all the extra daemons.  The underlying version of lirc itself
> is fine, and is working well for me and others on this list.  And I
> understand it well enough now to be able to help you get it working if
> you want that.
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