The Situation
I have a Hauppauge PVR350 card, which includes an IR receiver (connected via a 2.5mm socket on the card), but I also need to control an external cable box via an IR blaster (bought from irblaster.info), and have COM1 free.
Actually, since I have a Belkin MediaPilot keyboard (mostly) working, I won’t need to use [...]

Simple schematic for building serial interface :
http://fly.cc.fer.hr/~mozgic/UIR/http://www.lirc.org/receivers.html
On 9-pin Serial plug :Ground : Pin 5Data : Pin 1 (actually DCD)
Existing Hauppauge interface :http://www.irblaster.info/hauppauge_ir.html
2.5mm ConnectorTSOP 2238 IR ReceiverTip VCCRing SignalShield Ground
VSOP (or Everlight) IRM2238http://www.datasheetarchive.com/preview/1808114.htmlVCC=5V, 38KHz
USB Pinout :http://pinouts.ru/SerialPortsCables/usb_cable_pinout.shtmlPin 1 : VCC (+5V)Pin 2 : Data-Pin 3 : Data+Pin 4 : Ground
Even simpler circuit for IR [...]

Upgrade to 2.6.22 seems to break *everything* in the ivtv suite. It all disappeared from the rpms, so we need to install from source.

ivtv
ivtv-fb
ivtv-xdriver
ivtvfbctl (now gone)

In particular, some web posts indicate that support for the PVR-350 has been eliminated somehow. This doesn’t seem to be completely true – but maybe there’s a problem [...]

Aim :

Enable a lightly used Linux machine to additionally host a MythTV video card.

Major Issues :

Upgrade to 2.6.22 breaks *everything* :

ivtv
ivtv-fb
ivtv-xdriver
ivtvfb-ctl (now gone)

Want to have two independent displays (two simultaneous X servers running)

Complex /etc/X11/xorg.conf
Need to use evdev to have dual keyboards

Toy with /etc/gdm/custom.conf (not necessary, hardly working)

Added a Belkin wireless keyboard (from woot.com)

Set up special [...]