[mythtv-users] LIRC stopped recognizing remote with system upgrade

[Jarod Wilson]

On Jul 12, 2011, at 12:18 AM, Jerry Rubinow wrote:

> On Tue, Jul 12, 2011 at 12:07 AM, Jarod Wilson <jarod at wilsonet.com> wrote:
> On Jul 11, 2011, at 11:46 PM, Jerry Rubinow wrote:
> 
> > I recently upgraded my MythTV frontend and stupidly wiped my old configuration without saving my lircd.conf.  So I was trying to generate a new one.  Here's the hw/sw:
> >
> > Lirc 0.8.7, Mythbuntu 11.04.  mceusb IR receiver.  ReplayTV remote (and universal remote emulating ReplayTV remote).  lirc_dev and mceusb drivers specified in hardware.conf.  If I use the mceusb lircd.conf, everything works fine (irw displays the button presses of my MCE remote, mythtv responds), so I believe the receiver and software are working correctly.
> >
> > However, if I use irrecord with either the ReplayTV remote or the emulated ReplayTV remote, I end up with a file that does not recognize proper button presses.  During irrecord, I get lots of length 1 sequences.  I should note that in the old configuration (lirc under mythbuntu 10.04), the exact same hardware worked perfectly, so I'm not sure what I could be doing wrong or what might have changed.
> >
> > If I use the Replay lircd.conf file from the LIRC site, it doesn't display any button presses in irw.
> 
> There's a minor but critical for non-RC5/6 remotes bug in the mceusb driver
> that might be tripping you up. There's a timeout value in the driver that is
> 1/10th the time it should be (10ms instead of 100ms), which causes a reset
> event to trigger in the middle of a relatively long pulse or space sample,
> which does Bad Things to signal interpretation. It should be fixed in kernel
> 3.0, not sure if it'll be before release or via the stable tree, and 2.6.39
> should also get it via its stable tree. No clue about kernels that are any
> older than that. There's always media_build though, once the patch is merged
> into the media tree (I only sent the pull req this afternoon).
> 
> Well, that's good to know.  At least now I can stop beating my head against a wall.  Is there anything within my control I can do in the meantime to get this to work?

Well, you could get the media_build bits prepped, and manually apply the
necessary patches over the top, then build.

The two patches from Rafi Rubin are the ones you need:

http://git.kernel.org/?p=linux/kernel/git/jarod/linux-2.6-ir.git;a=shortlog;h=refs/heads/for-3.0


> Unfortunately, my URC-R50 remote doesn't seem to have an MCE code set.  I suppose I could have it learn all the MCE codes...

A Philips VCR codeset should also work. As should TiVo's NEC-ish codes,
if I'm thinking clearly.


-- 
Jarod Wilson
jarod at wilsonet.com