It takes a few restarts to get my display to work properly with my G5..why?

Sometimes when I start my G5 the cinema display doesn't start up with it (the picture that is, you can hear the display working but no picture!) and I have to keep restarting the G5 until it does! It usually always does start up after 2 or 3 restarts (sometimes even more) but I was wondering if anyone has some advice as to why this is? Is it likely to be a fault with the G5 or my cinema display? I don't understand why it always works eventually. Can anyone explain what is going on? It is starting to get really ridiculous having to keep on restarting!
Thanks, Adam

Hello and thanks for your reply. Sorry I have left it so long before returning.
Errmm, my room can get cold with the radiator off but I wouldn't call it freezing as there is usually something on in the rest of the house. What evidence is there that temperature would affect the start up of the display? Just wondering that's all.
Regarding the sound of the display. I'll have to restart it again and have a good listen. Maybe it is the actual G5 I am hearing and it is somehow sounding odd when the display doesn't come on. The times when the display comes on normally, everything seems to sound right if you know what I mean. Maybe I can record this on my camera or something and post that for you to watch (don't know if you can upload things to a post).
Regarding the torch or bright light into the screen. I'll give that a go and post back.
Thanks for your help
Adam

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Getting sasc-ng to work properly with systemd service files [SOLVED]

This thread is intended for getting the following AUR packages to work with each other with systemd service scripts:
https://aur.archlinux.org/packages/open-sasc-ng-dkms/
https://aur.archlinux.org/packages/open-sasc-ng/
https://aur.archlinux.org/packages/oscam-svn/ (this is a related package as it must properly execute prior to sasc-ng)
So my server is now on a fresh Arch install with systemd. All is well (& very fast) except I cannot get sasc-ng to function with systemd service init files. Prior to systemd the system worked fine with the rc initscripts & was very stable with the following setup:
rc.local
/etc/rc.d/oscam start
sleep 15
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sleep 4
/etc/rc.d/mythbackend start
/etc/conf.d/sasc-ng.conf
SASCNG_ARGS="-j 0:3 -j 1:4 -j 2:5" -b 16M --sid-allpid --sid-nocache --cam-budget"
DVBLOOPBACK_ARGS="num_adapters=3"
LOGDIR="/home/mythtv/logs/"
CAMDIR="/etc/camdir"
/etc/camdir/cardclient.conf
camd35:localhost:15050:1/0000/0000:mythtv:mythtv
I'll leave out the oscam stuff as that loads fine and doesn't appear to be a part of the problem
I've tried this with the systemd service file that comes with the open-sasc-ng-dkms package and when it was not sucessful I tried a bunch of variants including using "Type=simple" ect. "Type=Forked" seems to be only option that actually tries to start the processes. I also "hardcoded" the service files for the 2 sasc-ng components to find a few issues with the EnvironmentFile variables. The log variable has been removed for now as this seems to cause a fatal error but the rest of the variables load fine now. I also tested spliting up the DVB loopback module from the sasc-ng binary but this also gives similar results as the following script stands now. Running them manually with systemctl start commands doesn't make a difference but that is not surprising. The service file I'm fiddling with now which I feel has the best potential become working is:
sasc-ng.service
[Unit]
Description=Sasc-ng
After=oscam.service
[Service]
Type=forking
EnvironmentFile=/etc/conf.d/sasc-ng
ExecStartPre=/sbin/modprobe dvbloopback $DVBLOOPBACK_ARGS
TimeoutSec=2
ExecStart=/usr/sbin/sasc-ng -D $SASCNG_ARGS --cam-dir=$CAMDIR
TimeoutSec=4
[Install]
WantedBy=multi-user.target
Mythbackend always runs fine (even without DTV via sasc-ng) with the following mythbackend.service:
[Unit]
Description=MythTV_backend
After=sasc-ng.service
[Service]
Type=simple
Environment=MYTHCONFDIR=/etc/conf.d/mythbackend
Environment=HOME=/usr/share/mythtv
User=mythtv
ExecStart=/usr/bin/mythbackend --logpath /var/log/mythtv
[Install]
WantedBy=multi-user.target
oscam.service taken mostly from AUR package also seems fine. I added the TimeoutSec=15 to give time for oscam to load the SC and client protocol before moving on or else sasc-ng fails
Unit]
Description=An Open Source Conditional Access Module software
After=network.target
[Service]
Type=forking
EnvironmentFile=/etc/conf.d/oscam
ExecStart=/usr/bin/oscam $OSCAM_ARGS
TimeoutSec=15
[Install]
WantedBy=multi-user.target
Below is the output of the systemctl status commands. Despite the noise in the sasc-ng binary status, it is the loopback module that is " inactive (dead)" and there are no virtual DVB devices being created:
[mythtv@server ~]$ sudo systemctl status oscam.service
oscam.service - An Open Source Conditional Access Module software
Loaded: loaded (/usr/lib/systemd/system/oscam.service; enabled)
Active: active (running) since Tue, 2012-11-27 21:10:17 CET; 1min 7s ago
Process: 338 ExecStart=/usr/bin/oscam $OSCAM_ARGS (code=exited, status=0/SUCCESS)
Main PID: 377 (oscam)
CGroup: name=systemd:/system/oscam.service
├ 377 /usr/bin/oscam -b -c /etc/oscam
└ 378 /usr/bin/oscam -b -c /etc/oscam
Nov 27 21:10:17 server systemd[1]: Started An Open Source Conditional Acces...e.
[mythtv@server ~]$ sudo systemctl status loopback.service
loopback.service - Sasc-ng DVB Loopback Module
Loaded: loaded (/etc/systemd/system/loopback.service; enabled)
Active: inactive (dead) since Tue, 2012-11-27 21:10:28 CET; 1min 27s ago
Process: 907 ExecStart=/sbin/modprobe dvbloopback num_adapters=3 (code=exited, status=0/SUCCESS)
CGroup: name=systemd:/system/loopback.service
Nov 27 21:10:28 server systemd[1]: Started Sasc-ng DVB Loopback Module.
[mythtv@server ~]$ sudo systemctl status sasc-ng.service
sasc-ng.service - Sasc-ng
Loaded: loaded (/etc/systemd/system/sasc-ng.service; enabled)
Active: failed (Result: exit-code) since Tue, 2012-11-27 21:10:47 CET; 1min 45s ago
Process: 913 ExecStart=/usr/sbin/sasc-ng -D -j 0:3 -j 1:4 -j 2:5" -b 16M --sid-allpid --sid-nocache --cam-budget --cam-dir=/etc/camdir -l /home/mythtv/logs/sasc-ng.log (code=exited, status=0/SUCCESS)
Main PID: 921 (code=exited, status=255)
CGroup: name=systemd:/system/sasc-ng.service
Nov 27 21:10:39 server sasc-ng[921]: [921] [general.error] failed open /etc...ry
Nov 27 21:10:40 server sasc-ng[921]: [921] [general.error] failed open /etc...ry
Nov 27 21:10:40 server sasc-ng[921]: [921] [general.error] failed open /etc...ry
Nov 27 21:10:40 server sasc-ng[921]: [921] [general.info] loading cardclien...nf
Nov 27 21:10:42 server sasc-ng[921]: [1062] Netwatcher thread started (pid=...6)
Nov 27 21:10:42 server sasc-ng[921]: [921] [general.error] no keys loaded f...m!
Nov 27 21:10:46 server sasc-ng[921]: [1098] SC housekeeper thread started (...2)
Nov 27 21:10:47 server sasc-ng[921]: [1062] Netwatcher thread ended (pid=92...6)
Nov 27 21:10:47 server systemd[1]: sasc-ng.service: main process exited, co.../a
Nov 27 21:10:47 server systemd[1]: Unit sasc-ng.service entered failed state
[mythtv@server ~]$ sudo systemctl status sasc-ng.service
sasc-ng.service - Sasc-ng
Loaded: loaded (/etc/systemd/system/sasc-ng.service; enabled)
Active: failed (Result: exit-code) since Tue, 2012-11-27 21:10:47 CET; 2min 9s ago
Process: 913 ExecStart=/usr/sbin/sasc-ng -D -j 0:3 -j 1:4 -j 2:5" -b 16M --sid-allpid --sid-nocache --cam-budget --cam-dir=/etc/camdir -l /home/mythtv/logs/sasc-ng.log (code=exited, status=0/SUCCESS)
Main PID: 921 (code=exited, status=255)
CGroup: name=systemd:/system/sasc-ng.service
Nov 27 21:10:39 server sasc-ng[921]: [921] [general.error] failed open /etc/camdir/smartcard.conf: No such file or directory
Nov 27 21:10:40 server sasc-ng[921]: [921] [general.error] failed open /etc/camdir/cardslot.conf: No such file or directory
Nov 27 21:10:40 server sasc-ng[921]: [921] [general.error] failed open /etc/camdir/SoftCam.Key: No such file or directory
Nov 27 21:10:40 server sasc-ng[921]: [921] [general.info] loading cardclient config from /etc/camdir/cardclient.conf
Nov 27 21:10:42 server sasc-ng[921]: [1062] Netwatcher thread started (pid=921, tid=140074379712256)
Nov 27 21:10:42 server sasc-ng[921]: [921] [general.error] no keys loaded for softcam!
Nov 27 21:10:46 server sasc-ng[921]: [1098] SC housekeeper thread started (pid=921, tid=140074371319552)
Nov 27 21:10:47 server sasc-ng[921]: [1062] Netwatcher thread ended (pid=921, tid=140074379712256)
Nov 27 21:10:47 server systemd[1]: sasc-ng.service: main process exited, code=exited, status=255/n/a
Nov 27 21:10:47 server systemd[1]: Unit sasc-ng.service entered failed state
[mythtv@server ~]$
Any ideas?
Last edited by wdirksen (2012-12-10 19:54:43)

After some head scratching it seems to be all good now. Considering there have been no replies to this I've come to wonder if I might be the only one with this issue. I could get it working somewhat using service files but never ideal, ex. sasc-ng only using a few of the entitlements from oscam because it started too quick etc. Anyway this might help a few and I'm hoping the linux savvy who find what I'm writing here painfully newbie like or flawed will reply and educate me a bit if what's provided here needs some sharpening up:
1) Systemd was confusing the sasc-ng binary shorthand arguments with Linux init arguments and a few were misinterpreted if they were not nested into the environment specifiers. So the -l (log) was causing problems and -b (buffer) wasn't loading. To be safe I'm using only the sasc-ng longhand specifiers from now on (two "--" and more verbose) so that they can never be confused even if safely nested in an environment parameter. That means that /etc/conf.d/sasc-ng will also need to be changed to reflect this. I also decided to simplify the LOGFILE parameter to include the whole argument syntax.
2) Oscam.service needs to be initiated with oneshot and RemainAfterExit=yes to make sure the delay (15 seconds in my config) gets counted out before sasc-ng initiates.
[EDIT 12/12/2012: Initially I had a second TimeoutSec=2 after ExecStart in sasc-ng.service but this had no function. Turns out that it almost always does work without this delay but not always with my setup. Adding TimeoutSec=2 to mythbackend.service prior to ExecStart command does function and makes things init more consistant]
sasc-ng.service
[Unit]
Description=Sasc-ng
After=oscam.service
[Service]
Type=simple
EnvironmentFile=/etc/conf.d/sasc-ng
ExecStartPre=/sbin/modprobe dvbloopback $DVBLOOPBACK_ARGS
TimeoutSec=2
ExecStart=/usr/sbin/sasc-ng $SASCNG_ARGS --cam-dir $CAMDIR --log $LOGFILE
[Install]
WantedBy=multi-user.target
/etc/conf.d/sasc-ng
SASCNG_ARGS="--join 0:3 --join 1:4 --join 2:5 --buffer 16M --sid-allpid --sid-nocache --cam-budget"
DVBLOOPBACK_ARGS="num_adapters=3"
LOGFILE="/home/mythtv/logs/sasc-ng.log"
CAMDIR="/etc/camdir"
oscam.service
[Unit]
Description=An Open Source Conditional Access Module software
After=network.target
[Service]
Type=oneshot
EnvironmentFile=/etc/conf.d/oscam
ExecStart=/usr/bin/oscam $OSCAM_ARGS
TimeoutSec=15
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target
mythbackend.service
[Unit]
Description=MythTV_backend
After=sasc-ng.service
[Service]
Type=simple
TimeoutSec=2
Environment=MYTHCONFDIR=/etc/conf.d/mythbackend
Environment=HOME=/usr/share/mythtv
User=mythtv
ExecStart=/usr/bin/mythbackend --logpath /var/log/mythtv
[Install]
WantedBy=multi-user.target
I will make the related changes to the open-sasc-ng AUR package which I currently maintain
Last edited by wdirksen (2012-12-23 14:40:43)

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