/var/log/messages complains :

Nov 24 23:52:54 myth systemd[1]: mythbackend.service: control process exited, code=exited status=235
Nov 24 23:52:54 myth systemd[1]: Unit mythbackend.service entered failed state.

Simple solution (not tested whether this survives reboot) :

# touch /var/run/mythbackend.pid; chown mythtv:mythtv /var/run/mythbackend.pid
# systemctl start mythbackend.service
# grep mythbackend

MythTV suddenly stopped audio (yet again : Every upgrade the reason is different). This time, it appears that the order the audio cards are detected has changed, so the default output has changed…
The following is relevant to the process (haven’t tested this through a reboot, yet) :

$ pacmd help
$ pacmd info  | grep -i [...]

I’ve been maintaining a PVR350 on an old Dell 2.4GHz since forever.
Latest updates (to MythTV 24.1, and licrd 0.9.0.7) have made big changes. But it’s all working again, including a serial IR blaster. The following is just for my easy reference, and anyone else who now finds their Grey Hauppauge remote [...]

mysql -u mythtv -p mythconverg
delete from music_directories;delete from music_genres;delete from music_artists;delete from music_albums;delete from music_albumart;delete from music_songs;
and then reload all the music files by :
Utilities/Setup – Music Tools (which then rescans the files)

Aim : Use 1 computer for two tasks : a) Desktop for GF to use as a regular linux machine (web browsing, photos, etc)b) Completely independent MythTV set-up, with the output going to the TV.
Also, the set-up has to be turn-key, with both sessions logging in automatically (goodbye
gdm
).
There’s a lot going on for this one. [...]

After upgrading to FC9, the previously working serial port channel-changer (bought from IRblaster.info) stopped working. None of the configuration had changed.
In addition to the serial port transmitter, there’s a receiver on the PVR350 card – handled by lirc_i2c
After much searching, an additional option came to light :
softcarrier=1
.
Here are the relevant parts of a confirmed [...]

Add a lighttpd configuration file in
/etc/lighttpd/conf.d/lighttpd-myth.conf
(where my machine hostname is ‘americas’ on the local network) :
#! /bin/bash # Just for SciTE language hint
$HTTP["host"] == “myth.americas” { var.root=”/var/www/html/mythweb” server.document-root = var.root
url.rewrite = [...]

Email me for the gory details (for FC7) – but see a more up-to-date post for the same thing (much cleaner) in Fedora 9.

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 [...]