Le mardi 19 juin 2007 à 09:50 -0400, Alexandre Quessy a écrit : > Hi all, > I was wondering if someone has an idea on how one could create a > switch to turn on and off an installation. I was thinking about either > a push button to turn it off, or a web interface. Maybe one of those > two things could make Pd (or PHP) write to a file that would be parsed > by a cron job every minute. That cron job should be owned by root in > order to be able to halt the computer. Then, to turn it on, I guess > one could set the bios to turn on the computer automagically when the > power gets down and then up again... Or one could use the computer > power button (but in this case, it is an laptop that I want to hide > deeply...) The whole idea behind this is to avoid to suddenly turn off > the computer, which would probably corrupt the file system at some > point. Of course I use GNU/Linux : probably Ubuntu Server or Debian. > > Any suggestion ? >
hi alex, I lately setup a video installation using a Debian Lenny box on a mini-PC, that's hidden in the ceiling because of noise and visual distrubance. Of course the ACPI button is "very" difficult to reach, Bios has been setup to restart after a power failure. The power cord is over 10m long and connected to a switchable power adaptor. Shell access is granted from the artist's laptop running windoze thanks to Putty. Pd is started/stopped from the command line. The box is shutdown thanks to the magical "sudo halt" command line. I used to connect that machine to an UPC, but never had enough time to have it commanded over serial port which a very good solution to both protect your machine from data loss and have it start/stop at will. ++ O.
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