Difference between revisions of "User:Lwoggardner"
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logger -s -t "mythtv-checkidle" | logger -s -t "mythtv-checkidle" | ||
} | } | ||
− | # | + | |
+ | # Regardless of WOL settings and going into standbymode the 0.25 front-end | ||
+ | # simply cannot cope with the backend dropping out unexpectedly so we | ||
+ | # keep the BE up until the FE suspends itself | ||
check_frontend mythion && { | check_frontend mythion && { | ||
echo "Frontend is still up" | log | echo "Frontend is still up" | log |
Revision as of 00:38, 2 February 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!
Contents
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
- MythBuntu 12.04
- MythWeb
- 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 [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/bash ACCESS_LOG="/var/log/apache2/access.log" LOG_AGE="5 minutes ago" check_frontend() { # Not this doesn't care about what the FE is doing, just that it is up expect - $1 <<'END_EXPECT' #exp_internal 1 set timeout 2 log_user 0 set prompt "# " set cmd "query location\r" set frontend [lindex $argv 0] spawn netcat $frontend 6546 expect { timeout { send_user "\nNo prompt\n"; exit 1 } eof { send_user "\nNo output\n"; exit 1 } $prompt } send $cmd expect { timeout { send_user "\nNo response\n"; exit 1 } eof { send_user "\nPremature EOF\n"; exit 1 } -re "query location\r\n(.*)\r\r\n# " } set location $expect_out(1,string) send "exit\r" expect eof send_user "MythTVLocation:$location\n" END_EXPECT } log() { logger -s -t "mythtv-checkidle" } # Regardless of WOL settings and going into standbymode the 0.25 front-end # simply cannot cope with the backend dropping out unexpectedly so we # keep the BE up until the FE suspends itself check_frontend mythion && { echo "Frontend is still up" | log exit 1 } # anacron is running daily, weekly or monthly jobs pgrep 'anacron' && { echo "Anacron job is running" | log exit 1 } # apache request in last 5 minutes if [ -f $ACCESS_LOG -a `stat -c %Y $ACCESS_LOG` -gt `date --date "$LOG_AGE" "+%s"` ] ; then echo "Web server in use" | log exit 1 fi # users are logged in if [ `who | wc -l` -gt 0 ] ; then echo "Users logged in" | log who | log exit 1 fi /usr/bin/mythshutdown -v --check | log exit ${PIPESTATUS[0]}
/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. #!/bin/bash LOG=/var/log/mythtv/mythsuspend.log MODULE="dvb_usb_dib0700" echo "Will now $1 mythtv" | tee -a $LOG case $1 in suspend|hibernate) stop mythtv-backend 2>&1 | tee -a $LOG while [ `lsmod | grep "^${MODULE}" | wc -l` -gt 0 ] do sleep 1 modprobe -r $MODULE 2>&1 | tee -a $LOG done ;; resume|thaw) modprobe $MODULE 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