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[Gregor Jasny <gjasny@xxxxxxxxxxxxxx>]

As I don't vahe a good understanding of the rc subsystem I asked on
linux-media what's going on here and according to Mauro the absence of
rc6 seems to be a kernel bug:

https://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg98286.html

> That's said, from his report:
> 
>         $ sudo ir-keytable
>         Found /sys/class/rc/rc0/ (/dev/input/event4) with:
>          Driver imon, table rc-imon-pad
>          Supported protocols: other
> 
> It should be listing both "other" and "RC6" protocols there.
> It sounds a Kernel regression. I remember one Kernel patch once
> broke the list of protocols. Maybe the fix patch were not applied
> on Ubuntu, or maybe some other regression happened.


** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1579760

Title:
  Protocol RC-6 no longer available for soundgraph imon (15c2:ffdc)

Status in linux package in Ubuntu:
  New
Status in v4l-utils package in Ubuntu:
  New

Bug description:
  $ lsb_release -rd
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  $ apt-cache policy ir-keytable
  ir-keytable:
    Installed: 1.10.0-1
    Candidate: 1.10.0-1
    Version table:
   *** 1.10.0-1 500
          500 http://de.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
          100 /var/lib/dpkg/status

  == What used to happen in older releases:
  In older versions of ir-keytable I was able to set my soundgraph imon (15c2:ffdc) to use protocol RC-6.

  The way I did it was by changing the file:
  /lib/udev/rc_keymaps/imon_pad
   
  and make the first line look like:
  # table imon_pad, type: RC-6

  == What actually happens in the current release:
  In the 16.04 release of Ubuntu this is no longer possible. The output of ir-keytable also doesn't list the RC-6 protocol as available.

  $ sudo ir-keytable
  Found /sys/class/rc/rc0/ (/dev/input/event4) with:
  	Driver imon, table rc-imon-pad
  	Supported protocols: other
  	Enabled protocols:
  	Name: iMON Remote (15c2:ffdc)
  	bus: 3, vendor/product: 15c2:ffdc, version: 0x0000
  	Repeat delay = 500 ms, repeat period = 125 ms

  With the "other" protocol enabled my arrow keys deliver double key
  clicks, so clicking up once actually moves the cursor two lines up (in
  kodi that is).

  Forcing the device to RC-6 with:
  $ sudo echo RC-6 > /sys/class/rc/rc0/protocols

  fixes the double clicks.

  == What should happen in the current release:
  IMHO ir-keytable should actually list RC-6 as a protocol for this (specific) device and it should be relatively easy to assign this protocol. Either by using ir-keytable, or updating the imon_pad file.

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