Frederick's Free Blog

I think I have managed to solve the realtime priorities issue with the ubuntu sysv startup init script. However now I need testers to test and see if the INIT INFO header that I added will be honored by upstart. I am not ready to write upstart scripts for Rivendell yet. They say on their site that the format for the scripts is not totally set and could change so I am trying to get the sysv init script to where it works. I do not have a fast enough test machine for this. I know some on the list have reported this problem. I had one report where they cpu was a Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz.

The symptoms are Rivendell does not start or complains that /var/run does not exists. There maybe others. The problem only occurs on boot up. After the boot up is complete starting Rivendell works fine.

If you are interested in testing download this shared file and follow the instructions contain therein.

rivendell.startup_for_lucid

I have also added a feature where the script will wait for jackd to be started if you set a variable for that.

You may have noticed on your Ubuntu install (using debian.tryphon.org packages, this includes RRAbuntu Live CD Installs) of Rivendell that real time priorities do not get enable when it starts on boot up but if you restart after booting it does.

This assumes you have setup (or it was setup for you) like in this Rivendell wiki page on real time limits.

If you check your messages log. System>Administration>Log File Viewer>messages

You will find lines that either say Rivendell started with real time priorities or not.

Sep 23 16:12:47 rrabuntu caed: using realtime scheduling, priority=8

Sep 22 16:19:16 rrabuntu caed: Unable to set realtime scheduling: Operation not permitted

Obviously the second line is not what you want to see. It appears that the the problem is the start-stop-daemon that is being used in the sysv init script. Replacing the line from /etc/init.d/rivendell

start-stop-daemon –start –oknodo –chuid $DAEMON_USER –exec “/usr/bin/$daemon”

with a simple su command to change the user, like so:

su $DAEMON_USER -c “/usr/bin/$daemon”

allows the Rivendell daemons to start with real time priorities on boot.

Happy real time priority booting of Rivendell!

PS Any feedback on whether this still allows jackd to work with Rivendell would be appreciated.

If you run the RRAbuntu Live CD in demo mode it normally comes up in English, but maybe this is not your preferred language. What to do? As the CD is booting up there will appear a screen with the word Ubuntu and the Ubuntu logo. At the bottom of the screen you will see:

Basically this means a keyboard press = human intervention. When you see this pressing any key on the keyboard will take you to a menu that will allow you to change the interface language by pressing F2. You can also change the default keyboard by pressing F3.

After that select “Try Ubuntu without installing” (top menu entry) in your language to boot RRAbuntu from the CD.  With the current RRAbuntu (v1.13) the language of the user interface for Ubuntu will be what you selected and also for Rivendell. However the demo and installation scripts will still be in English. Changes will be needed to localize the scripts in future releases. If you find things in Rivendell that are not correctly translated or are not translated it means some work still needs to be done there. See this Rivendell wiki page about translations for more information.

Hi everyone!

Just wanted to say that I will be keeping an open mind about this blog and the subjects that I write about. Which means I will write about whatever I want to. I will tag the posts so you can search to see only what interests you.

Greetings,

Frederick