vladasyn
[DO NOT PLUG IN OR TURN ON YOUR MIDI DEVICES WHILE SONAR IS RUNNING!!!

Sometimes it works, sometimes it doesn't. If I need to use a MIDI device that is not currently connected and turned on I turn off Sonar (and save beforehand if need be) THEN turn on/connect my controllers and THEN turn on Sonar. I know you have a cmplex studio and you do not want to do that but seriously it takes maybe 5-10 seconds to save what you are doing, close Sonar, turn on whatever it is you want to use and THEN reopen Sonar.

 
Unplugging and replugging USB device is THE ONLY was to make Sonar to see it. When I open Sonar, some time it sees it, some time it does not. Some time, if I have to close perfectly working Sonar instance and reopen it, it opens without MIDI controller detected. I HAVE TO unplug controller and connect it again while Sonar is open. All my devices always connected except the Maschine- that one has to be unplugged for computer to even start, but that is all another story. My studio is not that advanced. It has Yamaha Motif USB connected and it always sees it, Presonus Fire Wire mixer and Novation LaunchPad MIDI- it is small desk controller- 25 keys- I never know if it will be detected or not. As I said- Novation sent me replacement USB cord. And, yes, I use it on the same port, and I also tried it on other ports.  


 
The quote thing seems to be broken in this post for some reason. The above^^^^^^ is what vlad said...
 
Below vvvvvvvv  is my reply. Freaky arse forum software.
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Wait for a minute before launching Sonar after reconnecting/turning on a devices. Sometimes if I open Sonar too quickly it will fail to detect as well. I usually don't have to wait a FULL minute but like I said... try giving it a bit of time. Maybe your device is still trying to get itself set up within Windows and it's own driver software and by opening Sonar you are interrupting it.
 
Just a suggestion. I usually get a little MIDI icon in the Windows taskbar once my controllers are ready.
 
And by even changing ports once just to try it out I think Windows then will log it as a brand new port for that device (on top of the old one). That could be confusing things as well. There are articles on line showing you how to clear all the MIDI ports within Windows so you can start from scratch using the ports you ACTUALLY intend to use.
 
I think many of those MIDI port issues have been made less annoying in Win7 (it was a major porblem in XP) but it probably does still cause some issues. If you are going to go through the bother of doing all that I would recommend you completely uninstall all the drivers for your devices, clear the Windows MIDI port crap THEN reinstall all the drivers with your devices connected to the ports you intend to use (follow the installation instructions for each device EXACTLY). Also make sure you have the latest drivers for the devices (don't use the CDs that came with the device because those are almost ALWAYS out of date). And one final thing to watch out for with drivers is sometimes a bad driver update will be released. You can use Google to find out if anyone is having problems with the most current drivers and then find out whether a previous release is working better for your O/S and other programs.
 
I am not a computer tech though. The other guys here can help you more with the intracacies of all that better than I can and I MAY be wrong on some (or all) of that so yanno... please don't come back yelling at me because your computer went weird. Beepster does NOT provide a warranty on his half ass intertube advice. ;-)

vladasyn
Unplugging and replugging USB device is THE ONLY was to make Sonar to see it. When I open Sonar, some time it sees it, some time it does not. Some time, if I have to close perfectly working Sonar instance and reopen it, it opens without MIDI controller detected. I HAVE TO unplug controller and connect it again while Sonar is open.

This is likely more a computer issue than SONAR. I have some hard drives and optical drives that my computer will not see unless they are plugged in after the computer is booted. I have others that need to be connected when booting or they won't be seen. Why? I have no idea and probably never will. My Mac doesn't do this as much but still, every now and then it won't recognize a USB stick or some other peripheral unless I reboot with it inserted. 
 
I should add none of these go through an external hub, powered or otherwise (the only devices I'll put on a hub are dongles), so that is not the issue; also, on the Windows computer all the USB ports are set not to suspend.
 
With my Casio XW-P1, both the computer and SONAR recognize it every time I plug it in, but only if it plugs into the same port each time.

Regarding the features request.. I entered my request about Undo and Redo buttons on several occasions. Nothing happened. I am not sure what I can contribute- would you like me to repost arpeggiators links?

vladasyn
The computer sees it. If I unplug it, computer can feel that some USB device was unplugged. It would play "Tam tam tam..." sound. Then when I plug in back, computer feels it again and plays another sound. It's the Sonar. 

I'm not sure about that. If you exceed the Windows MIDI port limit (and if you're on the edge of that limit, it can happen intermittently), the computer will recognize the device, you'll get the "inserted" sound, and the device will show up in device manager. But SONAR (or any other program) won't see it because there are layers between the USB ports, the USB controller, and what goes to the rest of the computer via the operating system - that's where the limit lies, not at the port itself. And you won't see you've hit the limit unless you run a batch file to show hidden devices (just choosing to show hidden devices in device manager isn't enough).
 
And it doesn't have to be the number of MIDI devices you're using currently. Unless you've cleaned out the hidden devices, there will be an entry for every time you plugged any MIDI device into a unique USB port since you installed the OS (i.e., if you plug the device into one MIDI port four times, that's one entry. If you plug the device into four MIDI ports one time, that's four entries).
 
A bigger question is why anyone would need to know this, but you'll have to take that up with Microsoft...I already have and there is a group of people working with the company to overcome this issue. But it's still there for now.

Actually I was referring to the drivers for your MIDI devices. Some MIDI controllers are plug and play (my M-Audio Oxygen 25 works without installing anything) but many require drivers (like my Korg padKontrol which was a pain to get working the first time).
 
However even with my M-Audio Oxygen 25, even though it is technically plug and play, M-Audio apparently has released drivers for it to solve certain problems.
 
So those are the types of drivers I would look for (like on Novation's site and whatever else you have). Even if your controllers are mostly working there may be an update that might help solve your ittermittent problems.
 
And yes... definitely try waiting for a little bit before opening Sonar. That does seem to help me.
 
As for you USB hub working even when unplugged some of those hubs are designed to use both power from the wall and power from your computer via USB. That way if you do not have an available electrical socket you can still use the hub... BUT it is better for the hub to be plugged into the wall because it causes less of a strain on your computer AND provides continuous power to your devices/prevents dropped signal.
 
Another thing to look at is a Windows setting. You may have already done this but make sure in Windows Power Management that you do not have your USB ports set to fall asleep. You want to use the Maximum Performance settings for the USB ports. In fact pretty much everything on your DAW should be set to Max Performance or the highest settings possible in the Windows Power Management section of the Control Panel. That way NOTHING on your computer falls alseep which can cause a LOT of problems for audio recording.
 
Actually your problem does sound a lot like your USB ports may be falling asleep sometimes but I thought you had already fixed that after your thread(s) a year ago. Better to check just to make sure.
 
Good luck.