Difference between revisions of "User:Lwoggardner"

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Let me just start by saying MythTV rocks.
 
 
I was keeping track of where I was at with Myth on my home wiki, but then figured I might as well share it here!
 
I was keeping track of where I was at with Myth on my home wiki, but then figured I might as well share it here!
  
== My Setup ==
+
= My Setup =
 +
 
 +
MythBuntu 12.04 with separated front-end/backend
 +
 
 +
* Live TV/TV recording Free to air HD/SD (from Sydney, Australia)
 +
* Multi-rec
 +
* DTS/AC3 passthrough including 5,1 surround digital out
 +
* VDPAU
 +
* [[MythMusic]]
 +
* [[MythGallery]]
 +
* [[MythVideo]]
 +
* Frontend Suspend to RAM + Wake On USB
 +
* Backend Suspend to RAM
 +
 
 +
== Backend ==
  
Combined FE/BE.
 
 
=== Hardware ===
 
=== Hardware ===
* AMD S754 Athlon 64 3700+
 
* Gigabyte S754 GA-K8VM800M
 
* 1GB Ram
 
* 320GB Western Digital 7200rpm 8M Serial ATA HDD
 
* Albatron FX5200LP 128M 8x Video Card with DVI output.
 
  
* DVICO FusionHDTV Hybrid Tuner
+
* HDDs totalling 1.2Tb
* DNTVLive LP Tuner
+
* Intel S775 Core 2 Q6600 Quad-Core CPU
 +
* Gigabyte S775 GA-G33M-S2 Motherboard
 +
* 4GB RAM
 +
* PCI Hauppauge Nova-T-500 MCE(OEM) Dual DVBT tuner
 +
* PCI Hauppauge Nova-TD 400 Dual DVBT tuner
 +
 
 +
=== Software ===
 +
 
 +
* MythBuntu 12.04
 +
* [[MythWeb]]
 +
* [http://svn.whuffy.com/index.fcgi/wiki Shepherd XMLTV grabber]
 +
 
 +
=== Configuration ===
 +
 
 +
* Channel 9, Gem, GO will not tune. The dtv_multiplex.network_id is null - set to 4114 seems to fix things.
 +
 
 +
==== Shepherd grabber ====
 +
 
 +
Standard install except cron job is disabled and allow mythtv to run mythfilldatabase. This is to allow mythtv to also be in control of suspend.
 +
 
 +
==== Suspend to RAM on idle ====
 +
 
 +
Why Suspend to RAM and not just a full shutdown that would "just work"?  Partly due to boot speed and partly just because.
 +
 
 +
'''Overview''':
 +
 
 +
* mythbackend controls idle detection, supported by a custom script to check other reasons to stay up, and sudo rules to allow passwordless root activity
 +
* suspend needs to unload dvb/usb modules which requires stopping mythbackend which means triggering suspend via upstart
 +
* wake up for recordings triggered by /sys/class/rtc as per [[ACPI_Wakeup]], hwlock-save update disabled via upstart override
 +
* wake up for daily processing (anacron) triggered by cron running on my (always on) DD-WRT enabled router issuing a WOL
 +
* wake up for serving adhoc web requests (mythweb et al) triggered by [[http://www.dd-wrt.com/wiki/index.php/Useful_Scripts#Web_Server_Wake-up|a custom router script]]
 +
 
 +
Settings (set via mythweb as server is basically headless)
 +
 
 +
{| border=1 cellspacing=0 cellpadding=5
 +
| '''Name'''
 +
| '''Setting'''
 +
| '''Value'''
 +
| '''Why'''
 +
|-|
 +
| Pre ShutdownWakeUp Check Command
 +
| preSDWUCheckCommand
 +
| /home/mythtv/bin/check-idle.sh
 +
| check if i'm logged in, or machine is in use for some other reason
 +
|-
 +
| Block ShutdownWakeUp without client
 +
| blockSDWUwithoutClient
 +
| 0
 +
| because this is a backend only machine
 +
|-
 +
| Set Wakeup time command
 +
| SetWakeuptimeCommand
 +
| sudo /usr/local/sbin/set-wakeup.sh $time
 +
|-
 +
| Server Halt command
 +
| ServerHaltCommand
 +
| sudo /usr/local/sbin/emit-suspend.sh
 +
| can't suspend directly because we need to shutdown mythbackend during suspend
 +
|-
 +
| Wakeup time format
 +
| WakeupTimeFormat
 +
| time_t
 +
| as per [[ACPI_Wakeup|ACPI wakeup]] page to use /sys/class/rtc
 +
|-
 +
|}
 +
===== /home/mythtv/bin/check_idle.sh =====
 +
<pre>
 +
#!/bin/sh
 +
 
 +
ACCESS_LOG="/var/log/apache2/access.log"
 +
LOG_AGE="5 minutes ago"
 +
 
 +
# Anacron runs our daily, weekly, monthly housekeeping (backups etc)
 +
# anacron runs at boot, on resume from suspend, and at 2:00am via a cron job
 +
# It will actually do its thing the first time it runs after midnight on any given day
 +
# In general I expect it to run at 2:30am when we are resumed by a cron scheduled WOL event from the router
 +
pgrep 'anacron' && {
 +
    echo "Anacron job is running"
 +
    exit 1
 +
}
 +
 
 +
# users are logged in
 +
if [ `who | wc -l` -gt 0 ] ; then
 +
    who
 +
    exit 1
 +
fi
 +
 
 +
# apache request in last 5 minutes
 +
# also need to configure apache to drop its dummy internal connections from the access logs
 +
if [ -f $ACCESS_LOG -a `stat -c %Y $ACCESS_LOG` -gt `date --date "$LOG_AGE" "+%s"` ] ; then
 +
    echo "Web server in use"
 +
    exit 1
 +
fi
 +
 
 +
# and all the standard mythtv stuff
 +
/usr/bin/mythshutdown -v --check
 +
</pre>
 +
 
 +
===== /etc/sudoers.d/mythtv =====
 +
<pre>
 +
#Enable mythtv to set the real time clock and emit the suspending event without a password prompt
 +
 
 +
%mythtv ALL = NOPASSWD: /usr/local/sbin/emit-suspend.sh, /usr/local/sbin/set-wakeup.sh
 +
</pre>
 +
 
 +
===== /usr/local/sbin/set-wakeup.sh =====
 +
<pre>
 +
#!/bin/sh
 +
#$1 is the first argument to the script. It is the time in seconds since 1970
 +
#this is defined in mythtv-setup with the time_t argument
 +
 
 +
echo 0 > /sys/class/rtc/rtc0/wakealarm      #this clears your alarm.
 +
echo $1 > /sys/class/rtc/rtc0/wakealarm    #this writes your alarm
 +
</pre>
  
* DVICO FusionRemote
+
===== /usr/local/sbin/emit-suspend.sh =====
 +
<pre>
 +
#!/bin/sh
 +
# Suspend via upstart
 +
initctl emit suspending
 +
</pre>
  
 +
===== /etc/init/suspending.conf =====
 +
<pre>
 +
start on (suspending)
 +
 +
script
 +
  logger -t "suspending" "Suspending via upstart"
 +
  pm-suspend
 +
end script
 +
</pre>
 +
 +
===== /etc/pm/sleep.d/50_mythtv =====
 +
<pre>
 +
#!/bin/sh
 +
# The dvb modules need to be unloaded to allow suspend/resume to work
 +
# To unload the modules mythbackend needs to be stopped
 +
#
 +
# NOTE: Suspend cannot be executed in a child process of mythbackend itself (eg via server halt command)
 +
# since it will simply abort at the point we stop mythbackend below. If this is required use upstart or some
 +
# other means to decouple pm-suspend from the mythbackend process.
 +
 +
LOG=/var/log/mythtv/mythsuspend.log
 +
MODULES="dvb_usb_dib0700"
 +
 +
echo "Will now $1 mythtv" | tee -a $LOG
 +
 +
case $1 in
 +
  suspend|hibernate)
 +
       
 +
        stop mythtv-backend 2>&1 | tee -a $LOG
 +
        sleep 3
 +
        modprobe -r  $MODULES 2>&1 | tee -a $LOG
 +
  ;;
 +
  resume|thaw)
 +
       
 +
        modprobe $MODULES
 +
        start mythtv-backend | tee -a $LOG
 +
  ;;
 +
esac
 +
</pre>
 +
 +
== Frontend ==
 +
 +
=== Hardware ===
 +
* ZOTAC ionitx-d-e board, 2G memory
 +
* Szrealan E-2011 case (tiny!)
 +
* External DVD player
 +
* 1Tb external e-Sata drive
 
* BenQ PE8700 DLP Projector
 
* BenQ PE8700 DLP Projector
 +
* Sony Bravia TV over HDMI
 +
* CambridgeAudio AV receiver
 +
  
 
=== Software ===
 
=== Software ===
* Ubuntu Dapper (upgraded from Breezy server install)
+
* MythBuntu 12.04 64bit
* Kernel 2.6.15-25-amd64-k8
+
* [http://synergy2.sourceforge.net/ Synergy] to allow laptop to be the keyboard/mouse.
* Patched v4l-dvb drivers (Many thanks to [http://www.itee.uq.edu.au/~chrisp/Linux-DVB/ Chris Pascoe] for getting the DVICO card going)
+
 
* [http://www.nvidia.com/object/unix.html NVidia amd64 version 8762]
+
=== Configuration ===
* lirc version 0.8.0 (Dapper upgrade changed device from <code>/dev/usb/hiddev0</code> to <code>/dev/hiddev0</code>
+
 
* [[Ratpoison]] window manager
+
==== Enable Wake on USB ====
* MythTV 0.19.x fixes branch (had to move <code>/usr/lib/libdts_pic.a</code> to <code>/usr/lib/libdts.a</code> to compile)
+
We need to enable USB0 in /proc/acpi/wakeup
* [http://xinehq.de Xine] external DVD/video player
+
 
 +
Note if USB2 is also enabled, then the board immediately wakes up regardless, unsure if this is due to another USB device
 +
 
 +
Seems to be enabled by default for Mythbuntu 12.04 but
 +
Current cheap as Chinese remote does not send the wakeup signal from the power button unfortunately
 +
 
 +
==== Auto-start X ====
 +
 
 +
* disabled lightdm in via upstart override (echo 'manual' > /etc/init/lightdm.override)
 +
* [[Frontend Auto Login|Simple mingetty startup]] with a tty definition and a startx script in the console
 +
* user .xsession linked to /usr/share/mythbuntu/session.sh so we get the same xfce startup.
 +
 
 +
===== /etc/init/tty7.conf =====
 +
<pre>
 +
# tty7 - mythtv
 +
#
 +
start on runlevel [23]
 +
stop on runlevel [!23]
 +
 
 +
respawn
 +
exec /sbin/mingetty --autologin=mythtv tty7
 +
</pre>
 +
 
 +
===== ~mythtv/.profile =====
 +
Appended to detect if we are on tty7, in which case we start-up X with an optional layout specified in ~/.mythrc
 +
 
 +
Note that when X is stopped we automatically logout and respawn
 +
 
 +
<pre>
 +
start-frontend() {
 +
MYTHRC="$HOME/.mythrc"
 +
if [ -r $MYTHRC ] ; then
 +
  . $MYTHRC
 +
fi
 +
 
 +
LAYOUT_SPEC=
 +
[ ! -z "$LAYOUT" ] && LAYOUT_SPEC="-layout $LAYOUT"
 +
 
 +
startx --  $LAYOUT_SPEC -logverbose 5
 +
logout
 +
}
  
== What's working for me ==
+
tty | grep tty7 && start-frontend
 +
</pre>
  
* Live TV/TV recording Free to air HD/SD (from Sydney, Australia). Both tuner's simultaneously.
+
===== xorg.conf =====
* AC3 passthrough including 5,1 surround
+
For PE8700 Samsung LCD. See also the tips for the [[NVidiaProprietaryDriver]]
* XvMC ( with Bob de-interlacing for HD channels. Have to manually turn it off for SD stuff).
 
* [http://www.cse.unsw.edu.au/~willu/xmltv/tv_grab_au_reg.html XMLTV grabber] from the OZTivo site
 
* [[MythMusic]]
 
* [[MythGallery]]
 
* [[MythDVD]] using xine as an external player
 
  
== What's not ==
+
The FX5200 cards were the cause of my DVI problems on my projector. Apparently they freak out a PCB component causing the EDID data to become corrupt.
* Multi-monitor config. I need an easy way to switch between MythTV running on my TV-Out and on the projector. There's some shows where it is just not worth wasting lamp hours on.
+
(a Gigabyte card lasted from Aug 2006 to Dec 2007. Fortunately the new nvidia driver allow you to use a CustomEDID to load the data from a file.
* My projector. Apparently the DVI on the video card is not exactly to spec and freaks out a PCB component in the projector causing the EDID data to become corrupt.
 
  
== What more do I want to do ==
+
Option ExactModeTimingsDVI is also important for the projector.
* I'd like MythMusic to use MythGallery as a visualisation!
 
* More cleanup of MythGallery thumbnail code. (Thumbnail cache is unnecessary if EXIF thumbnails are available in the images themselves)
 
  
== Useful config info ==
+
Option "UseEDIDDpi" "false" or some equivalent control of DPI is important for the Samsung television otherwise you get really small fonts (fixed in 0.21)
xorg.conf for PE8700.
 
ExactModeTimingsDVI is important!, not sure about the others.
 
  
Since nvidia version 8756 the Modeline is not required as it generates them from the EDID and specifying 1280x720 works fine.
+
There are two layouts, the default uses outputs via VGA to a Samsung LCD television, the second uses DVI to the PE8700 projector.
  
 
<pre>
 
<pre>
 +
Section "ServerLayout"
 +
    Identifier    "Main" # Output to Samsung LCD television
 +
#LCD[0] VGA, LCD[1] HDMI
 +
    Screen        0 "LCD[1]" 0 0
 +
    Option        "Xinerama" "off"
 +
EndSection
 +
 +
Section "ServerLayout"
 +
    Identifier    "Projector"
 +
    Screen        0 "Projector[0]" 0 0
 +
    Option        "Xinerama" "off"
 +
EndSection
 +
 +
Section "Module"
 +
        Load    "glx"
 +
EndSection
 +
 +
Section "Device"
 +
    Identifier    "ION-GPU[0]"
 +
    Driver        "nvidia"
 +
    BusID          "PCI:3:0:0"
 +
    Screen        0
 +
    #This prevents the cursor being displayed on resume from suspend
 +
    Option        "HWCursor" "off"
 +
EndSection
 +
 +
Section "Screen"
 +
    Identifier    "LCD[1]"
 +
    Device        "ION-GPU[0]"
 +
    Monitor        "AnyMonitor"
 +
    DefaultDepth    24
 +
    Option        "UseDisplayDevice" "DFP-1" # HDMI
 +
    Option        "ConnectedMonitor" "DFP-1"
 +
EndSection
 +
 +
Section "Screen"
 +
    Identifier    "LCD[0]"
 +
    Device        "ION-GPU[0]"
 +
    Monitor        "AnyMonitor"
 +
    DefaultDepth    24
 +
    Option        "ConnectedMonitor" "CRT-1"
 +
    Option        "UseEDIDDpi" "FALSE" #Computed DPI values not so good for TV display
 +
    Option        "UseDisplayDevice" "CRT-1" # VGA out
 +
    SubSection    "Display"
 +
        Depth      24
 +
        Modes      "1360x768" "800x600"
 +
    EndSubSection
 +
EndSection
 +
 +
Section "Screen"
 +
    Identifier    "Projector[0]"
 +
    Device        "ION-GPU[0]"
 +
    Monitor        "AnyMonitor"
 +
    Option        "ConnectedMonitor" "DFP"
 +
    Option        "UseDisplayDevice" "DFP" # DVI out
 +
    Option        "CustomEDID" "DFP-0:/etc/X11/benq-c.bin"
 +
 +
    DefaultDepth    24
 +
    SubSection    "Display"
 +
        Depth      24
 +
        Modes      "1280x720" "800x600"
 +
    EndSubSection
 +
EndSection
 +
 
Section "Monitor"
 
Section "Monitor"
     Identifier     "Benq PE8700"
+
     Identifier   "AnyMonitor"
     Option         "DPMS"
+
     Option       "DPMS"
     Option         "UseEDIDFreqs" "true"
+
     Option       "ExactModeTimingsDVI" "true"
    Option        "ExactModeTimingsDVI" "true"
+
     Option       "RenderAccel" "true"
     Option             "ConnectedMonitor" "DFP"
 
    Option        "RenderAccel" "true"
 
    Modeline "pe8700" 74.160 1280 1352 1392 1648 720 725 730 750 -hsync -vsync
 
 
EndSection
 
EndSection
 +
 +
</pre>
 +
 +
===== ~mythtv/.mythtv/session =====
 +
 +
Start a ruby program that listens to /dev/lircd and manages -
 +
 +
* mythtv via updating the database + network control port
 +
* the AV receiver via RS232 - volume/mute, power on/off, input type
 +
* alsa via calls to amixer - volume/mute, digital/analog outputs
 +
* suspend on lirc idle or power button
 +
* restart specifying TV or Projector layout
 +
 +
<pre>
 +
#!/bin/sh
 +
 +
#store our dbus session and display where our kill script can pick it up
 +
export | egrep "DBUS_SESSION_BUS_ADDRESS|DISPLAY" > ~/.xsession-export
 +
 +
#Run unclutter to hide the cursor after resume - not required - see HWCursor in xorg.conf
 +
#unclutter -display $DISPLAY &
 +
 +
#run our main lirc control program
 +
/home/mythtv/bin/audiomodeswitch/main.rb &
 +
</pre>
 +
 +
===== ~mythtv/bin/suspend_mythtv.sh =====
 +
<pre>
 +
#!/bin/sh
 +
 +
# We use dbus-send because it seems to block until resume which is what we want
 +
echo "Suspending"
 +
 +
dbus-send --system --print-reply --dest=org.freedesktop.Hal /org/freedesktop/Hal/devices/computer \
 +
        org.freedesktop.Hal.Device.SystemPowerManagement.Suspend int32:2
 +
 +
echo "Resumed"
 
</pre>
 
</pre>
  
 +
===== ~mythtv/bin/kill_mythtv.sh =====
 +
Script is called by the ruby program, but also useful to restart from ssh
 +
<pre>
 +
#!/bin/sh
 +
 +
[ -f $HOME/.xsession-export ] && . $HOME/.xsession-export
 +
echo "killing mythfrontend"
 +
pkill mythfrontend
 +
#pkill unclutter
 +
echo "xfce logout $DISPLAY"
 +
xfce4-session-logout --logout --fast
 +
</pre>
 +
 +
==== LIRC Remote Control ====
 +
 +
Standard mythbuntu setup for MCE remote.
 +
 +
==== Sound ====
 +
 +
Onboard sound
 +
 +
=====~/.asoundrc=====
 +
 +
Could probably do better 48/44kHz switching on the analog output between music and video but if that is important we just go digital passthrough and let the receiver do the work.
 +
 +
In myth config, you can see that default sound device is ALSA:myth-video, the passthrough device is ALSA:myth-passthru, and mythmusic uses ALSA:myth-music. the AC3PassThru and DTSPassThru
 +
settings are managed by the ruby program
  
.asoundrc For ALSA digital audio out
 
 
<pre>
 
<pre>
pcm.!default {
+
#First line comment
type plug
+
 
slave {
+
pcm.myth-music {
pcm "spdif"
+
  type copy
rate 48000
+
  slave.pcm "default"
format S16_LE
+
}
 +
 
 +
ctl.myth-music {
 +
  type hw
 +
  card 0
 +
}
 +
 
 +
pcm.myth-video {
 +
  type copy
 +
  slave.pcm "default"
 
}
 
}
 +
 +
ctl.myth-video {
 +
  type hw
 +
  card 0
 
}
 
}
 +
 +
pcm.myth-passthru {
 +
  type copy
 +
  slave.pcm = "spdif"
 +
}
 +
 +
ctl.myth-passthru {
 +
  type hw
 +
  card 0
 +
}
 +
 
</pre>
 
</pre>
  
.xsession To start MFE and Ratpoison
+
=== minimyth.conf ===
 +
TODO - Works nicely through the WRT310N router etc, but we have a hard drive have decided to stick with Mythbuntu for now.
 +
 
 +
== Upgrades ==
 +
 
 +
=== Mythbuntu 12.04 ===
 +
 
 +
Reconfigured from scratch for no particular reason
 +
 
 +
=== Mythbuntu 10.10 ===
 +
 
 +
100% clean on server
 +
 
 +
front end was missing non-versioned symlink for vdpau nvidia library
 
<pre>
 
<pre>
#Remove default blue background around TV-out picture
+
ln -s /etc/alternatives/libvdpau_nvidia.so /usr/lib/libvdpau_nvidia.so
xvattr -a XV_COLORKEY -v 0
 
ratpoison &
 
mythfrontend -l mfe.log
 
 
</pre>
 
</pre>
 +
 +
=== Mythbuntu 9.10 ===
 +
 +
100% clean on server
 +
 +
front end needed /etc/events.d/tty7 moved to /etc/init/tty7.conf
 +
 +
=== Mythbuntu 8.10  ===
 +
 +
=== 0.21-fixes ===
 +
upgrade smooth
 +
 +
[[Category:User_Systems]]

Revision as of 04:09, 12 January 2013

I was keeping track of where I was at with Myth on my home wiki, but then figured I might as well share it here!

My Setup

MythBuntu 12.04 with separated front-end/backend

  • Live TV/TV recording Free to air HD/SD (from Sydney, Australia)
  • Multi-rec
  • DTS/AC3 passthrough including 5,1 surround digital out
  • VDPAU
  • MythMusic
  • MythGallery
  • MythVideo
  • Frontend Suspend to RAM + Wake On USB
  • Backend Suspend to RAM

Backend

Hardware

  • HDDs totalling 1.2Tb
  • Intel S775 Core 2 Q6600 Quad-Core CPU
  • Gigabyte S775 GA-G33M-S2 Motherboard
  • 4GB RAM
  • PCI Hauppauge Nova-T-500 MCE(OEM) Dual DVBT tuner
  • PCI Hauppauge Nova-TD 400 Dual DVBT tuner

Software

Configuration

  • Channel 9, Gem, GO will not tune. The dtv_multiplex.network_id is null - set to 4114 seems to fix things.

Shepherd grabber

Standard install except cron job is disabled and allow mythtv to run mythfilldatabase. This is to allow mythtv to also be in control of suspend.

Suspend to RAM on idle

Why Suspend to RAM and not just a full shutdown that would "just work"? Partly due to boot speed and partly just because.

Overview:

  • mythbackend controls idle detection, supported by a custom script to check other reasons to stay up, and sudo rules to allow passwordless root activity
  • suspend needs to unload dvb/usb modules which requires stopping mythbackend which means triggering suspend via upstart
  • wake up for recordings triggered by /sys/class/rtc as per ACPI_Wakeup, hwlock-save update disabled via upstart override
  • wake up for daily processing (anacron) triggered by cron running on my (always on) DD-WRT enabled router issuing a WOL
  • wake up for serving adhoc web requests (mythweb et al) triggered by [custom router script]

Settings (set via mythweb as server is basically headless)

Name Setting Value Why
Pre ShutdownWakeUp Check Command preSDWUCheckCommand /home/mythtv/bin/check-idle.sh check if i'm logged in, or machine is in use for some other reason
Block ShutdownWakeUp without client blockSDWUwithoutClient 0 because this is a backend only machine
Set Wakeup time command SetWakeuptimeCommand sudo /usr/local/sbin/set-wakeup.sh $time
Server Halt command ServerHaltCommand sudo /usr/local/sbin/emit-suspend.sh can't suspend directly because we need to shutdown mythbackend during suspend
Wakeup time format WakeupTimeFormat time_t as per ACPI wakeup page to use /sys/class/rtc
/home/mythtv/bin/check_idle.sh
#!/bin/sh

ACCESS_LOG="/var/log/apache2/access.log"
LOG_AGE="5 minutes ago"

# Anacron runs our daily, weekly, monthly housekeeping (backups etc)
# anacron runs at boot, on resume from suspend, and at 2:00am via a cron job
# It will actually do its thing the first time it runs after midnight on any given day
# In general I expect it to run at 2:30am when we are resumed by a cron scheduled WOL event from the router 
pgrep 'anacron' && {
    echo "Anacron job is running"
    exit 1
}

# users are logged in
if [ `who | wc -l` -gt 0 ] ; then
    who
    exit 1
fi

# apache request in last 5 minutes
# also need to configure apache to drop its dummy internal connections from the access logs
if [ -f $ACCESS_LOG -a `stat -c %Y $ACCESS_LOG` -gt `date --date "$LOG_AGE" "+%s"` ] ; then
    echo "Web server in use"
    exit 1
fi

# and all the standard mythtv stuff
/usr/bin/mythshutdown -v --check
/etc/sudoers.d/mythtv
#Enable mythtv to set the real time clock and emit the suspending event without a password prompt

%mythtv ALL = NOPASSWD: /usr/local/sbin/emit-suspend.sh, /usr/local/sbin/set-wakeup.sh
/usr/local/sbin/set-wakeup.sh
#!/bin/sh
#$1 is the first argument to the script. It is the time in seconds since 1970
#this is defined in mythtv-setup with the time_t argument

echo 0 > /sys/class/rtc/rtc0/wakealarm      #this clears your alarm.
echo $1 > /sys/class/rtc/rtc0/wakealarm     #this writes your alarm
/usr/local/sbin/emit-suspend.sh
#!/bin/sh
# Suspend via upstart
initctl emit suspending
/etc/init/suspending.conf
start on (suspending)

script
   logger -t "suspending" "Suspending via upstart" 
   pm-suspend
end script
/etc/pm/sleep.d/50_mythtv
#!/bin/sh
# The dvb modules need to be unloaded to allow suspend/resume to work
# To unload the modules mythbackend needs to be stopped
# 
# NOTE: Suspend cannot be executed in a child process of mythbackend itself (eg via server halt command)
# since it will simply abort at the point we stop mythbackend below. If this is required use upstart or some
# other means to decouple pm-suspend from the mythbackend process.

LOG=/var/log/mythtv/mythsuspend.log
MODULES="dvb_usb_dib0700"

echo "Will now $1 mythtv" | tee -a $LOG

case $1 in
  suspend|hibernate)
        
        stop mythtv-backend 2>&1 | tee -a $LOG
        sleep 3
        modprobe -r  $MODULES 2>&1 | tee -a $LOG 
  ;;
  resume|thaw)
        
        modprobe $MODULES
        start mythtv-backend | tee -a $LOG
  ;;
esac

Frontend

Hardware

  • ZOTAC ionitx-d-e board, 2G memory
  • Szrealan E-2011 case (tiny!)
  • External DVD player
  • 1Tb external e-Sata drive
  • BenQ PE8700 DLP Projector
  • Sony Bravia TV over HDMI
  • CambridgeAudio AV receiver


Software

  • MythBuntu 12.04 64bit
  • Synergy to allow laptop to be the keyboard/mouse.

Configuration

Enable Wake on USB

We need to enable USB0 in /proc/acpi/wakeup

Note if USB2 is also enabled, then the board immediately wakes up regardless, unsure if this is due to another USB device

Seems to be enabled by default for Mythbuntu 12.04 but Current cheap as Chinese remote does not send the wakeup signal from the power button unfortunately

Auto-start X

  • disabled lightdm in via upstart override (echo 'manual' > /etc/init/lightdm.override)
  • Simple mingetty startup with a tty definition and a startx script in the console
  • user .xsession linked to /usr/share/mythbuntu/session.sh so we get the same xfce startup.
/etc/init/tty7.conf
# tty7 - mythtv
#
start on runlevel [23]
stop on runlevel [!23]

respawn
exec /sbin/mingetty --autologin=mythtv tty7
~mythtv/.profile

Appended to detect if we are on tty7, in which case we start-up X with an optional layout specified in ~/.mythrc

Note that when X is stopped we automatically logout and respawn

start-frontend() {
MYTHRC="$HOME/.mythrc"
if [ -r $MYTHRC ] ; then
   . $MYTHRC
fi

LAYOUT_SPEC=
[ ! -z "$LAYOUT" ] && LAYOUT_SPEC="-layout $LAYOUT"

startx --  $LAYOUT_SPEC -logverbose 5
logout
}

tty | grep tty7 && start-frontend
xorg.conf

For PE8700 Samsung LCD. See also the tips for the NVidiaProprietaryDriver

The FX5200 cards were the cause of my DVI problems on my projector. Apparently they freak out a PCB component causing the EDID data to become corrupt. (a Gigabyte card lasted from Aug 2006 to Dec 2007. Fortunately the new nvidia driver allow you to use a CustomEDID to load the data from a file.

Option ExactModeTimingsDVI is also important for the projector.

Option "UseEDIDDpi" "false" or some equivalent control of DPI is important for the Samsung television otherwise you get really small fonts (fixed in 0.21)

There are two layouts, the default uses outputs via VGA to a Samsung LCD television, the second uses DVI to the PE8700 projector.

Section "ServerLayout"
    Identifier     "Main" # Output to Samsung LCD television
#LCD[0] VGA, LCD[1] HDMI
    Screen         0 "LCD[1]" 0 0
    Option         "Xinerama" "off"
EndSection

Section "ServerLayout"
    Identifier     "Projector"
    Screen         0 "Projector[0]" 0 0
    Option         "Xinerama" "off"
EndSection
 
Section "Module"
        Load    "glx"
EndSection

Section "Device"
    Identifier     "ION-GPU[0]"
    Driver         "nvidia"
    BusID          "PCI:3:0:0"
    Screen         0
    #This prevents the cursor being displayed on resume from suspend
    Option         "HWCursor" "off"
EndSection

Section "Screen"
    Identifier     "LCD[1]"
    Device         "ION-GPU[0]"
    Monitor        "AnyMonitor"
    DefaultDepth    24
    Option         "UseDisplayDevice" "DFP-1" # HDMI
    Option         "ConnectedMonitor" "DFP-1"
EndSection

Section "Screen"
    Identifier     "LCD[0]"
    Device         "ION-GPU[0]"
    Monitor        "AnyMonitor"
    DefaultDepth    24
    Option         "ConnectedMonitor" "CRT-1"
    Option         "UseEDIDDpi" "FALSE" #Computed DPI values not so good for TV display
    Option         "UseDisplayDevice" "CRT-1" # VGA out
    SubSection     "Display"
        Depth       24
        Modes       "1360x768" "800x600"
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Projector[0]"
    Device         "ION-GPU[0]"
    Monitor        "AnyMonitor"
    Option         "ConnectedMonitor" "DFP"
    Option         "UseDisplayDevice" "DFP" # DVI out
    Option         "CustomEDID" "DFP-0:/etc/X11/benq-c.bin"

    DefaultDepth    24
    SubSection     "Display"
        Depth       24
        Modes       "1280x720" "800x600"
    EndSubSection
EndSection

Section "Monitor"
    Identifier   "AnyMonitor"
    Option       "DPMS"
    Option       "ExactModeTimingsDVI" "true"
    Option       "RenderAccel" "true"
EndSection

~mythtv/.mythtv/session

Start a ruby program that listens to /dev/lircd and manages -

  • mythtv via updating the database + network control port
  • the AV receiver via RS232 - volume/mute, power on/off, input type
  • alsa via calls to amixer - volume/mute, digital/analog outputs
  • suspend on lirc idle or power button
  • restart specifying TV or Projector layout
#!/bin/sh

#store our dbus session and display where our kill script can pick it up
export | egrep "DBUS_SESSION_BUS_ADDRESS|DISPLAY" > ~/.xsession-export

#Run unclutter to hide the cursor after resume - not required - see HWCursor in xorg.conf
#unclutter -display $DISPLAY &

#run our main lirc control program
/home/mythtv/bin/audiomodeswitch/main.rb &
~mythtv/bin/suspend_mythtv.sh
#!/bin/sh

# We use dbus-send because it seems to block until resume which is what we want
echo "Suspending"

dbus-send --system --print-reply --dest=org.freedesktop.Hal /org/freedesktop/Hal/devices/computer \
        org.freedesktop.Hal.Device.SystemPowerManagement.Suspend int32:2

echo "Resumed"
~mythtv/bin/kill_mythtv.sh

Script is called by the ruby program, but also useful to restart from ssh

#!/bin/sh

[ -f $HOME/.xsession-export ] && . $HOME/.xsession-export
echo "killing mythfrontend"
pkill mythfrontend
#pkill unclutter
echo "xfce logout $DISPLAY"
xfce4-session-logout --logout --fast

LIRC Remote Control

Standard mythbuntu setup for MCE remote.

Sound

Onboard sound

~/.asoundrc

Could probably do better 48/44kHz switching on the analog output between music and video but if that is important we just go digital passthrough and let the receiver do the work.

In myth config, you can see that default sound device is ALSA:myth-video, the passthrough device is ALSA:myth-passthru, and mythmusic uses ALSA:myth-music. the AC3PassThru and DTSPassThru settings are managed by the ruby program

#First line comment

pcm.myth-music {
  type copy
  slave.pcm "default"
}

ctl.myth-music {
  type hw
  card 0
}

pcm.myth-video {
  type copy 
  slave.pcm "default"
}

ctl.myth-video {
  type hw
  card 0
}

pcm.myth-passthru {
  type copy
  slave.pcm = "spdif"
}

ctl.myth-passthru {
  type hw
  card 0
}

minimyth.conf

TODO - Works nicely through the WRT310N router etc, but we have a hard drive have decided to stick with Mythbuntu for now.

Upgrades

Mythbuntu 12.04

Reconfigured from scratch for no particular reason

Mythbuntu 10.10

100% clean on server

front end was missing non-versioned symlink for vdpau nvidia library

ln -s /etc/alternatives/libvdpau_nvidia.so /usr/lib/libvdpau_nvidia.so

Mythbuntu 9.10

100% clean on server

front end needed /etc/events.d/tty7 moved to /etc/init/tty7.conf

Mythbuntu 8.10

0.21-fixes

upgrade smooth