[mythtv-users] Homebrew Serial Receiver Problems

Jeremy Gillick myth at mozmonkey.com
Sat Feb 24 21:50:23 UTC 2007

Formerly I was using the Hauppage PVR 150 remote, but recently I decided 
to move to a custom remote -- the Universal FX1.

I followed the circuit designs here:

The only modification I made was instead of buying a new IR receiver, I 
attached a stereo plug to the serial port so I couple plug the Hauppage 
receiver into it.  I double checked my work and even did some basic 
tests with my workbench power supply.

Then I followed the software steps here:

It's not working.  In fact, the serial port isn't even getting power, so 
I assume that it's not active.  I've never messed with serial port stuff 
before, so could somebody help me out?   Here are the commands I tried 
giving it:

    setserial /dev/ttyS0 uart none
    depmod -a
    modprobe lirc_serial
    mode2  -d /dev/lirc/0

FYI: I'm running on Ubuntu Dapper and using the serial port on the 

When looking through dmesg, here's the only references to lirc -- and 
they're still for the Hauppage:

    [17179596.772000] lirc_i2c: chip found @ 0x71 (Hauppauge IR (PVR150))
    [17179596.772000] ivtv0: i2c attach to card #0 ok [client=Hauppauge
    IR (PVR150), addr=71]
    [17179596.772000] lirc_dev: lirc_register_plugin: sample_rate: 10
    [17179596.880000] Adding 1052216k swap on /dev/hda1.  Priority:-1
    extents:1 across:1052216k

Am I missing something here?

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