I have tried echo on > /sys/bus/usb/devices/usb1/power/level # turn on echo suspend > /sys/bus/usb/devices/usb1/power/level # turn off
with different devices (like 4-2 which is the MIDI interface) and I'm always getting "invalid argument" when I try to use "suspend". Any ideas? Ingo > A while ago a MIDI interface problem came up here that nobody seemed to > really know about: > > All the sudden huge delays in the range of one or more seconds started to > happen and then the interface sometimes possibly started playing notes, > etc. > on its own. > I had experienced this quite a few times with Pd on Windows and Linux and > already way back (about 25 years ago) with my Akai MPC60 drum sequencer. > > I finally found out what causes it. > When starting the computer the interface gets powered up as well before > the > system is ready to receive any information coming from the interface. > Therefor the interface keeps every input on the MIDI side in a buffer > until > it can transmit it to the USB port. > > From time to time the buffer gets completely overloaded during startup > when > receiving too much MIDI what in return makes the interface go nuts! The > only > way to reset it is to disconnect it from power. > > > Now here is my question: > > Does anybody know how I can power off a USB port (probably using [shell]) > to > do a reset (USB power off - USB power on) while or after loading the > patch? > > I'm on Ubuntu Natty. > > Thanks > Ingo > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
