Ableton Forum

I had this issue for a couple of weeks now... it doesn't happen all the time but the problem came back enough for me to post it.

When I open Live, all the usb devices already plugged in the machine are recognized and appear in the preference's tab "MIDI/Sync". But everything that I plug after that is not recognized and sometime (not always...) Live will not notice if I unplug an already recognized device. I have to shut down and restart Live and everything is there but if I unplug something and plug it back, the same problem happens.

I was considering it might be the hubs I'm using but sometime I would unplug a whole hub and live would think that the devices that were on this hub are still plugged...

As I am typing this topic, I made some tests and the problem came... and now it's gone. Everything works fine. I try to think that it is solved but I did nothing in particular so it will come again.

Anyone experienced that? Any solution?

Live is updated 8.2.2

i have had some issues with some controllers and soundcard.....some controllers wouldn't work on the same hub as my sound card....so i had to separate some things from other things....particularly a fast track pro and a maudio axiom 25....for me, do not work on the same usb hub....so i run my axiom on its own port, separate from everything else....i have read up on it a little, and i think it has to do with one usb port not having enough juice to power a bunch of controllers etc. on its own...people have suggested getting a powered usb hub...or like the axiom, you can buy a separate plug for it.

Thanks eddiex.

I do have powered hubs. I understand that I have to be careful about what is plugged where and how many devices requires some amount of juice. I'll look upon it.

Macbook Pro 15" have only 2 usb port (ridiculus...) so I'm limited there...

bujol wrote:Thanks eddiex.

I do have powered hubs. I understand that I have to be careful about what is plugged where and how many devices requires some amount of juice. I'll look upon it.

Macbook Pro 15" have only 2 usb port (ridiculus...) so I'm limited there...

i feel you, i just have a macbook...2 usb, 1 firewire 400.
my understanding is controllers that have lights, like the launchpad, or crazy blue screens, like my axiom25...that type of thing,phantom power.....if you have a bunch of these devices, it taxes the bus, so you either have to get a powered usb hub, or start powering your devices...otherwise they act up....here is an article i read on the subject http://www.djtechtools.com/2010/01/25/u ... j-hi-spee/